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| | | MJExtension |
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| | | === |
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| | | - A fast, convenient and nonintrusive conversion framework between JSON and model. |
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| | | - 转换速度快、使用简单方便的字典转模型框架 |
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| | | GitHub：[CoderMJLee](https://github.com/CoderMJLee) ｜ Blog：[mjios(Chinese)](http://www.cnblogs.com/mjios) ｜ PR is welcome，or [feedback](mailto:richermj123go@vip.qq.com) |
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| | | ## Contents |
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| | | * [Getting Started 【开始使用】](#Getting_Started) |
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| | | * [Features 【能做什么】](#Features) |
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| | | * [Installation 【安装】](#Installation) |
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| | | * [Examples 【示例】](#Examples) |
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| | | * [JSON -> Model](#JSON_Model) |
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| | | * [JSONString -> Model](#JSONString_Model) |
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| | | * [Model contains model](#Model_contains_model) |
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| | | * [Model contains model-array](#Model_contains_model_array) |
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| | | * [Model name - JSON key mapping](#Model_name_JSON_key_mapping) |
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| | | * [JSON array -> model array](#JSON_array_model_array) |
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| | | * [Model -> JSON](#Model_JSON) |
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| | | * [Model array -> JSON array](#Model_array_JSON_array) |
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| | | * [Core Data](#Core_Data) |
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| | | * [Coding](#Coding) |
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| | | * [Camel -> underline](#Camel_underline) |
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| | | * [NSString -> NSDate, nil -> @""](#NSString_NSDate) |
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| | | * [More use cases](#More_use_cases) |
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| | | |
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| | | --- |
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| | | # <a id="Getting_Started"></a> Getting Started【开始使用】 |
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| | | |
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| | | ## <a id="Features"></a> Features【能做什么】 |
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| | | - MJExtension是一套字典和模型之间互相转换的超轻量级框架 |
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| | | * `JSON` --> `Model`、`Core Data Model` |
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| | | * `JSONString` --> `Model`、`Core Data Model` |
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| | | * `Model`、`Core Data Model` --> `JSON` |
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| | | * `JSON Array` --> `Model Array`、`Core Data Model Array` |
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| | | * `JSONString` --> `Model Array`、`Core Data Model Array` |
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| | | * `Model Array`、`Core Data Model Array` --> `JSON Array` |
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| | | * Coding all properties of a model with only one line of code. |
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| | | * 只需要一行代码，就能实现模型的所有属性进行Coding（归档和解档） |
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| | | |
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| | | ## <a id="Installation"></a> Installation【安装】 |
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| | | |
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| | | ### From CocoaPods【使用CocoaPods】 |
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| | | |
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| | | ```ruby |
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| | | pod 'MJExtension' |
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| | | ``` |
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| | | |
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| | | ### Manually【手动导入】 |
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| | | - Drag all source files under folder `MJExtension` to your project.【将`MJExtension`文件夹中的所有源代码拽入项目中】 |
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| | | - Import the main header file：`#import "MJExtension.h"`【导入主头文件：`#import "MJExtension.h"`】 |
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| | | |
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| | | ```objc |
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| | | MJExtension.h |
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| | | MJConst.h MJConst.m |
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| | | MJFoundation.h MJFoundation.m |
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| | | MJProperty.h MJProperty.m |
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| | | MJType.h MJType.m |
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| | | NSObject+MJCoding.h NSObject+MJCoding.m |
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| | | NSObject+MJProperty.h NSObject+MJProperty.m |
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| | | NSObject+MJKeyValue.h NSObject+MJKeyValue.m |
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| | | ``` |
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| | | |
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| | | # <a id="Examples"></a> Examples【示例】 |
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| | | |
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| | | ### <a id="JSON_Model"></a> The most simple JSON -> Model【最简单的字典转模型】 |
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| | | |
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| | | ```objc |
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| | | typedef enum { |
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| | | SexMale, |
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| | | SexFemale |
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| | | } Sex; |
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| | | @interface User : NSObject |
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| | | @property (copy, nonatomic) NSString *name; |
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| | | @property (copy, nonatomic) NSString *icon; |
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| | | @property (assign, nonatomic) unsigned int age; |
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| | | @property (copy, nonatomic) NSString *height; |
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| | | @property (strong, nonatomic) NSNumber *money; |
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| | | @property (assign, nonatomic) Sex sex; |
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| | | @property (assign, nonatomic, getter=isGay) BOOL gay; |
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| | | @end |
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| | | |
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| | | /***********************************************/ |
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| | | |
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| | | NSDictionary *dict = @{ |
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| | | @"name" : @"Jack", |
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| | | @"icon" : @"lufy.png", |
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| | | @"age" : @20, |
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| | | @"height" : @"1.55", |
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| | | @"money" : @100.9, |
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| | | @"sex" : @(SexFemale), |
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| | | @"gay" : @"true" |
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| | | // @"gay" : @"1" |
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| | | // @"gay" : @"NO" |
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| | | }; |
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| | | |
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| | | // JSON -> User |
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| | | User *user = [User mj_objectWithKeyValues:dict]; |
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| | | NSLog(@"name=%@, icon=%@, age=%zd, height=%@, money=%@, sex=%d, gay=%d", user.name, user.icon, user.age, user.height, user.money, user.sex, user.gay); |
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| | | // name=Jack, icon=lufy.png, age=20, height=1.550000, money=100.9, sex=1 |
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| | | ``` |
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| | | |
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| | | ### <a id="JSONString_Model"></a> JSONString -> Model【JSON字符串转模型】 |
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| | | |
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| | | ```objc |
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| | | // 1.Define a JSONString |
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| | | NSString *jsonString = @"{\"name\":\"Jack\", \"icon\":\"lufy.png\", \"age\":20}"; |
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| | | // 2.JSONString -> User |
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| | | User *user = [User mj_objectWithKeyValues:jsonString]; |
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| | | // 3.Print user's properties |
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| | | NSLog(@"name=%@, icon=%@, age=%d", user.name, user.icon, user.age); |
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| | | // name=Jack, icon=lufy.png, age=20 |
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| | | ``` |
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| | | |
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| | | ### <a id="Model_contains_model"></a> Model contains model【模型中嵌套模型】 |
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| | | |
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| | | ```objc |
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| | | @interface Status : NSObject |
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| | | @property (copy, nonatomic) NSString *text; |
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| | | @property (strong, nonatomic) User *user; |
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| | | @property (strong, nonatomic) Status *retweetedStatus; |
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| | | @end |
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| | | |
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| | | /***********************************************/ |
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| | | |
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| | | NSDictionary *dict = @{ |
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| | | @"text" : @"Agree!Nice weather!", |
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| | | @"user" : @{ |
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| | | @"name" : @"Jack", |
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| | | @"icon" : @"lufy.png" |
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| | | }, |
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| | | @"retweetedStatus" : @{ |
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| | | @"text" : @"Nice weather!", |
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| | | @"user" : @{ |
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| | | @"name" : @"Rose", |
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| | | @"icon" : @"nami.png" |
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| | | } |
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| | | } |
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| | | }; |
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| | | |
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| | | // JSON -> Status |
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| | | Status *status = [Status mj_objectWithKeyValues:dict]; |
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| | | NSString *text = status.text; |
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| | | NSString *name = status.user.name; |
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| | | NSString *icon = status.user.icon; |
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| | | NSLog(@"text=%@, name=%@, icon=%@", text, name, icon); |
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| | | // text=Agree!Nice weather!, name=Jack, icon=lufy.png |
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| | | NSString *text2 = status.retweetedStatus.text; |
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| | | NSString *name2 = status.retweetedStatus.user.name; |
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| | | NSString *icon2 = status.retweetedStatus.user.icon; |
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| | | NSLog(@"text2=%@, name2=%@, icon2=%@", text2, name2, icon2); |
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| | | // text2=Nice weather!, name2=Rose, icon2=nami.png |
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| | | ``` |
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| | | |
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| | | ### <a id="Model_contains_model_array"></a> Model contains model-array【模型中有个数组属性，数组里面又要装着其他模型】 |
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| | | ```objc |
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| | | @interface Ad : NSObject |
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| | | @property (copy, nonatomic) NSString *image; |
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| | | @property (copy, nonatomic) NSString *url; |
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| | | @end |
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| | | @interface StatusResult : NSObject |
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| | | /** Contatins status model */ |
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| | | @property (strong, nonatomic) NSMutableArray *statuses; |
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| | | /** Contatins ad model */ |
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| | | @property (strong, nonatomic) NSArray *ads; |
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| | | @property (strong, nonatomic) NSNumber *totalNumber; |
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| | | @end |
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| | | |
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| | | /***********************************************/ |
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| | | |
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| | | // Tell MJExtension what type of model will be contained in statuses and ads. |
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| | | [StatusResult mj_setupObjectClassInArray:^NSDictionary *{ |
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| | | return @{ |
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| | | @"statuses" : @"Status", |
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| | | // @"statuses" : [Status class], |
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| | | @"ads" : @"Ad" |
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| | | // @"ads" : [Ad class] |
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| | | }; |
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| | | }]; |
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| | | // Equals: StatusResult.m implements +mj_objectClassInArray method. |
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| | | |
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| | | NSDictionary *dict = @{ |
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| | | @"statuses" : @[ |
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| | | @{ |
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| | | @"text" : @"Nice weather!", |
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| | | @"user" : @{ |
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| | | @"name" : @"Rose", |
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| | | @"icon" : @"nami.png" |
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| | | } |
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| | | }, |
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| | | @{ |
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| | | @"text" : @"Go camping tomorrow!", |
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| | | @"user" : @{ |
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| | | @"name" : @"Jack", |
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| | | @"icon" : @"lufy.png" |
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| | | } |
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| | | } |
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| | | ], |
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| | | @"ads" : @[ |
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| | | @{ |
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| | | @"image" : @"ad01.png", |
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| | | @"url" : @"http://www.ad01.com" |
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| | | }, |
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| | | @{ |
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| | | @"image" : @"ad02.png", |
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| | | @"url" : @"http://www.ad02.com" |
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| | | } |
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| | | ], |
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| | | @"totalNumber" : @"2014" |
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| | | }; |
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| | | // JSON -> StatusResult |
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| | | StatusResult *result = [StatusResult mj_objectWithKeyValues:dict]; |
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| | | NSLog(@"totalNumber=%@", result.totalNumber); |
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| | | // totalNumber=2014 |
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| | | |
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| | | // Printing |
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| | | for (Status *status in result.statuses) { |
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| | | NSString *text = status.text; |
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| | | NSString *name = status.user.name; |
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| | | NSString *icon = status.user.icon; |
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| | | NSLog(@"text=%@, name=%@, icon=%@", text, name, icon); |
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| | | } |
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| | | // text=Nice weather!, name=Rose, icon=nami.png |
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| | | // text=Go camping tomorrow!, name=Jack, icon=lufy.png |
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| | | |
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| | | // Printing |
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| | | for (Ad *ad in result.ads) { |
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| | | NSLog(@"image=%@, url=%@", ad.image, ad.url); |
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| | | } |
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| | | // image=ad01.png, url=http://www.ad01.com |
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| | | // image=ad02.png, url=http://www.ad02.com |
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| | | ``` |
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| | | |
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| | | ### <a id="Model_name_JSON_key_mapping"></a> Model name - JSON key mapping【模型中的属性名和字典中的key不相同(或者需要多级映射)】 |
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| | | ```objc |
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| | | @interface Bag : NSObject |
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| | | @property (copy, nonatomic) NSString *name; |
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| | | @property (assign, nonatomic) double price; |
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| | | @end |
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| | | @interface Student : NSObject |
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| | | @property (copy, nonatomic) NSString *ID; |
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| | | @property (copy, nonatomic) NSString *desc; |
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| | | @property (copy, nonatomic) NSString *nowName; |
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| | | @property (copy, nonatomic) NSString *oldName; |
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| | | @property (copy, nonatomic) NSString *nameChangedTime; |
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| | | @property (strong, nonatomic) Bag *bag; |
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| | | @end |
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| | | |
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| | | /***********************************************/ |
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| | | |
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| | | // How to map |
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| | | [Student mj_setupReplacedKeyFromPropertyName:^NSDictionary *{ |
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| | | return @{ |
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| | | @"ID" : @"id", |
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| | | @"desc" : @"description", |
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| | | @"oldName" : @"name.oldName", |
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| | | @"nowName" : @"name.newName", |
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| | | @"nameChangedTime" : @"name.info[1].nameChangedTime", |
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| | | @"bag" : @"other.bag" |
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| | | }; |
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| | | }]; |
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| | | // Equals: Student.m implements +mj_replacedKeyFromPropertyName method. |
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| | | |
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| | | NSDictionary *dict = @{ |
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| | | @"id" : @"20", |
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| | | @"description" : @"kids", |
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| | | @"name" : @{ |
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| | | @"newName" : @"lufy", |
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| | | @"oldName" : @"kitty", |
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| | | @"info" : @[ |
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| | | @"test-data", |
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| | | @{ |
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| | | @"nameChangedTime" : @"2013-08" |
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| | | } |
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| | | ] |
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| | | }, |
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| | | @"other" : @{ |
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| | | @"bag" : @{ |
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| | | @"name" : @"a red bag", |
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| | | @"price" : @100.7 |
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| | | } |
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| | | } |
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| | | }; |
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| | | |
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| | | // JSON -> Student |
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| | | Student *stu = [Student mj_objectWithKeyValues:dict]; |
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| | | |
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| | | // Printing |
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| | | NSLog(@"ID=%@, desc=%@, oldName=%@, nowName=%@, nameChangedTime=%@", |
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| | | stu.ID, stu.desc, stu.oldName, stu.nowName, stu.nameChangedTime); |
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| | | // ID=20, desc=kids, oldName=kitty, nowName=lufy, nameChangedTime=2013-08 |
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| | | NSLog(@"bagName=%@, bagPrice=%f", stu.bag.name, stu.bag.price); |
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| | | // bagName=a red bag, bagPrice=100.700000 |
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| | | ``` |
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| | | |
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| | | ### <a id="JSON_array_model_array"></a> JSON array -> model array【将一个字典数组转成模型数组】 |
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| | | |
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| | | ```objc |
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| | | NSArray *dictArray = @[ |
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| | | @{ |
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| | | @"name" : @"Jack", |
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| | | @"icon" : @"lufy.png" |
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| | | }, |
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| | | @{ |
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| | | @"name" : @"Rose", |
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| | | @"icon" : @"nami.png" |
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| | | } |
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| | | ]; |
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| | | |
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| | | // JSON array -> User array |
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| | | NSArray *userArray = [User mj_objectArrayWithKeyValuesArray:dictArray]; |
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| | | |
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| | | // Printing |
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| | | for (User *user in userArray) { |
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| | | NSLog(@"name=%@, icon=%@", user.name, user.icon); |
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| | | } |
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| | | // name=Jack, icon=lufy.png |
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| | | // name=Rose, icon=nami.png |
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| | | ``` |
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| | | |
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| | | ### <a id="Model_JSON"></a> Model -> JSON【将一个模型转成字典】 |
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| | | ```objc |
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| | | // New model |
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| | | User *user = [[User alloc] init]; |
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| | | user.name = @"Jack"; |
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| | | user.icon = @"lufy.png"; |
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| | | |
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| | | Status *status = [[Status alloc] init]; |
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| | | status.user = user; |
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| | | status.text = @"Nice mood!"; |
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| | | |
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| | | // Status -> JSON |
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| | | NSDictionary *statusDict = status.mj_keyValues; |
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| | | NSLog(@"%@", statusDict); |
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| | | /* |
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| | | { |
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| | | text = "Nice mood!"; |
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| | | user = { |
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| | | icon = "lufy.png"; |
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| | | name = Jack; |
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| | | }; |
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| | | } |
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| | | */ |
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| | | |
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| | | // More complex situation |
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| | | Student *stu = [[Student alloc] init]; |
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| | | stu.ID = @"123"; |
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| | | stu.oldName = @"rose"; |
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| | | stu.nowName = @"jack"; |
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| | | stu.desc = @"handsome"; |
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| | | stu.nameChangedTime = @"2018-09-08"; |
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| | | |
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| | | Bag *bag = [[Bag alloc] init]; |
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| | | bag.name = @"a red bag"; |
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| | | bag.price = 205; |
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| | | stu.bag = bag; |
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| | | |
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| | | NSDictionary *stuDict = stu.mj_keyValues; |
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| | | NSLog(@"%@", stuDict); |
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| | | /* |
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| | | { |
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| | | ID = 123; |
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| | | bag = { |
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| | | name = "\U5c0f\U4e66\U5305"; |
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| | | price = 205; |
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| | | }; |
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| | | desc = handsome; |
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| | | nameChangedTime = "2018-09-08"; |
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| | | nowName = jack; |
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| | | oldName = rose; |
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| | | } |
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| | | */ |
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| | | ``` |
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| | | |
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| | | ### <a id="Model_array_JSON_array"></a> Model array -> JSON array【将一个模型数组转成字典数组】 |
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| | | |
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| | | ```objc |
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| | | // New model array |
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| | | User *user1 = [[User alloc] init]; |
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| | | user1.name = @"Jack"; |
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| | | user1.icon = @"lufy.png"; |
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| | | |
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| | | User *user2 = [[User alloc] init]; |
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| | | user2.name = @"Rose"; |
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| | | user2.icon = @"nami.png"; |
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| | | |
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| | | NSArray *userArray = @[user1, user2]; |
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| | | |
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| | | // Model array -> JSON array |
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| | | NSArray *dictArray = [User mj_keyValuesArrayWithObjectArray:userArray]; |
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| | | NSLog(@"%@", dictArray); |
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| | | /* |
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| | | ( |
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| | | { |
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| | | icon = "lufy.png"; |
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| | | name = Jack; |
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| | | }, |
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| | | { |
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| | | icon = "nami.png"; |
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| | | name = Rose; |
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| | | } |
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| | | ) |
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| | | */ |
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| | | ``` |
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| | | |
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| | | ### <a id="Core_Data"></a> Core Data |
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| | | |
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| | | ```objc |
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| | | NSDictionary *dict = @{ |
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| | | @"name" : @"Jack", |
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| | | @"icon" : @"lufy.png", |
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| | | @"age" : @20, |
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| | | @"height" : @1.55, |
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| | | @"money" : @"100.9", |
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| | | @"sex" : @(SexFemale), |
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| | | @"gay" : @"true" |
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| | | }; |
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| | | |
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| | | // This demo just provide simple steps |
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| | | NSManagedObjectContext *context = nil; |
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| | | User *user = [User mj_objectWithKeyValues:dict context:context]; |
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| | | |
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| | | [context save:nil]; |
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| | | ``` |
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| | | |
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| | | ### <a id="Coding"></a> Coding |
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| | | |
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| | | ```objc |
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| | | #import "MJExtension.h" |
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| | | |
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| | | @implementation Bag |
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| | | // NSCoding Implementation |
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| | | MJExtensionCodingImplementation |
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| | | @end |
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| | | |
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| | | /***********************************************/ |
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| | | |
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| | | // what properties not to be coded |
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| | | [Bag mj_setupIgnoredCodingPropertyNames:^NSArray *{ |
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| | | return @[@"name"]; |
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| | | }]; |
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| | | // Equals: Bag.m implements +mj_ignoredCodingPropertyNames method. |
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| | | |
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| | | // Create model |
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| | | Bag *bag = [[Bag alloc] init]; |
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| | | bag.name = @"Red bag"; |
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| | | bag.price = 200.8; |
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| | | |
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| | | NSString *file = [NSHomeDirectory() stringByAppendingPathComponent:@"Desktop/bag.data"]; |
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| | | // Encoding |
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| | | [NSKeyedArchiver archiveRootObject:bag toFile:file]; |
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| | | |
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| | | // Decoding |
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| | | Bag *decodedBag = [NSKeyedUnarchiver unarchiveObjectWithFile:file]; |
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| | | NSLog(@"name=%@, price=%f", decodedBag.name, decodedBag.price); |
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| | | // name=(null), price=200.800000 |
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| | | ``` |
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| | | |
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| | | ### <a id="Camel_underline"></a> Camel -> underline【统一转换属性名（比如驼峰转下划线）】 |
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| | | ```objc |
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| | | // Dog |
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| | | #import "MJExtension.h" |
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| | | |
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| | | @implementation Dog |
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| | | + (NSString *)mj_replacedKeyFromPropertyName121:(NSString *)propertyName |
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| | | { |
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| | | // nickName -> nick_name |
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| | | return [propertyName mj_underlineFromCamel]; |
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| | | } |
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| | | @end |
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| | | |
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| | | // NSDictionary |
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| | | NSDictionary *dict = @{ |
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| | | @"nick_name" : @"旺财", |
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| | | @"sale_price" : @"10.5", |
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| | | @"run_speed" : @"100.9" |
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| | | }; |
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| | | // NSDictionary -> Dog |
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| | | Dog *dog = [Dog mj_objectWithKeyValues:dict]; |
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| | | |
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| | | // printing |
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| | | NSLog(@"nickName=%@, scalePrice=%f runSpeed=%f", dog.nickName, dog.salePrice, dog.runSpeed); |
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| | | ``` |
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| | | |
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| | | ### <a id="NSString_NSDate"></a> NSString -> NSDate, nil -> @""【过滤字典的值（比如字符串日期处理为NSDate、字符串nil处理为@""）】 |
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| | | ```objc |
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| | | // Book |
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| | | #import "MJExtension.h" |
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| | | |
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| | | @implementation Book |
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| | | - (id)mj_newValueFromOldValue:(id)oldValue property:(MJProperty *)property |
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| | | { |
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| | | if ([property.name isEqualToString:@"publisher"]) { |
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| | | if (oldValue == nil) return @""; |
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| | | } else if (property.type.typeClass == [NSDate class]) { |
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| | | NSDateFormatter *fmt = [[NSDateFormatter alloc] init]; |
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| | | fmt.dateFormat = @"yyyy-MM-dd"; |
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| | | return [fmt dateFromString:oldValue]; |
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| | | } |
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| | | |
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| | | return oldValue; |
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| | | } |
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| | | @end |
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| | | |
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| | | // NSDictionary |
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| | | NSDictionary *dict = @{ |
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| | | @"name" : @"5分钟突破iOS开发", |
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| | | @"publishedTime" : @"2011-09-10" |
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| | | }; |
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| | | // NSDictionary -> Book |
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| | | Book *book = [Book mj_objectWithKeyValues:dict]; |
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| | | |
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| | | // printing |
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| | | NSLog(@"name=%@, publisher=%@, publishedTime=%@", book.name, book.publisher, book.publishedTime); |
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| | | ``` |
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| | | |
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| | | ### <a id="More_use_cases"></a> More use cases【更多用法】 |
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| | | - Please reference to `NSObject+MJKeyValue.h` and `NSObject+MJCoding.h` |
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| | | |
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| | | |
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| | | ## 期待 |
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| | | * 如果在使用过程中遇到BUG，希望你能Issues我，谢谢（或者尝试下载最新的框架代码看看BUG修复没有） |
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| | | * 如果在使用过程中发现功能不够用，希望你能Issues我，我非常想为这个框架增加更多好用的功能，谢谢 |
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| | | * 如果你想为MJExtension输出代码，请拼命Pull Requests我 |
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