//
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// AdvertiseHelper.m
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// MobileProject 启动广告帮助类
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//
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// Created by wujunyang on 16/6/14.
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// Copyright © 2016年 wujunyang. All rights reserved.
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//
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#import "AdvertiseHelper.h"
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static NSString *const adImageName = @"adImageName";
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@implementation AdvertiseHelper
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static AdvertiseHelper* _instance = nil;
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+ (instancetype)sharedInstance
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{
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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_instance = [[self alloc] init];
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});
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return _instance;
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}
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(adClick:) name:NotificationContants_Advertise_Key object:nil];
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}
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return self;
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}
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+ (void)showAdvertiserView:(NSArray<NSString *> *)imageArray
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{
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// 1.判断沙盒中是否存在广告图片，如果存在，直接显示
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NSString *filePath = [[AdvertiseHelper sharedInstance] getFilePathWithImageName:[NSUserDefaults.standardUserDefaults valueForKey:adImageName]];
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BOOL isExist = [[AdvertiseHelper sharedInstance] isFileExistWithFilePath:filePath];
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if (isExist) {// 图片存在
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AdvertiseView *advertiseView = [[AdvertiseView alloc] initWithFrame:UIScreen.mainScreen.bounds];
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advertiseView.filePath = filePath;
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[advertiseView show];
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}
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// 2.无论沙盒中是否存在广告图片，都需要重新调用广告接口，判断广告是否更新
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[[AdvertiseHelper sharedInstance] getAdvertisingImage:imageArray];
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}
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/**
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* 初始化广告页面
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*/
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- (void)getAdvertisingImage:(NSArray<NSString *> *)imageArray
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{
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//随机取一张
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NSString *imageUrl = imageArray[arc4random() % imageArray.count];
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NSArray *stringArr = [imageUrl componentsSeparatedByString:@"/"];
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NSString *imageName = stringArr.lastObject;
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// 拼接沙盒路径
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NSString *filePath = [self getFilePathWithImageName:imageName];
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BOOL isExist = [self isFileExistWithFilePath:filePath];
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if (!isExist){// 如果该图片不存在，则删除老图片，下载新图片
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[self downloadAdImageWithUrl:imageUrl imageName:imageName];
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}
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}
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/**
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* 判断文件是否存在
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*/
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- (BOOL)isFileExistWithFilePath:(NSString *)filePath
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{
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NSFileManager *fileManager = [NSFileManager defaultManager];
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BOOL isDirectory = FALSE;
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return [fileManager fileExistsAtPath:filePath isDirectory:&isDirectory];
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}
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/**
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* 下载新图片
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*/
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- (void)downloadAdImageWithUrl:(NSString *)imageUrl imageName:(NSString *)imageName
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{
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dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
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NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:imageUrl]];
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NSString *filePath = [self getFilePathWithImageName:imageName]; // 保存文件的名称
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if ([data writeToFile:filePath atomically:YES]) {// 保存成功
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NSLog(@"保存成功");
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[self deleteOldImage];
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[NSUserDefaults.standardUserDefaults setValue:imageName forKey:adImageName];
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[NSUserDefaults.standardUserDefaults synchronize];
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// 如果有广告链接，将广告链接也保存下来
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}else{
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NSLog(@"保存失败");
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}
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});
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}
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/**
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* 删除旧图片
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*/
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- (void)deleteOldImage
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{
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NSString *imageName = [NSUserDefaults.standardUserDefaults valueForKey:adImageName];
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if (imageName) {
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NSString *filePath = [self getFilePathWithImageName:imageName];
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NSFileManager *fileManager = [NSFileManager defaultManager];
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[fileManager removeItemAtPath:filePath error:nil];
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}
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}
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/**
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* 根据图片名拼接文件路径
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*/
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- (NSString *)getFilePathWithImageName:(NSString *)imageName
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{
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if (imageName) {
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NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES);
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NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:imageName];
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return filePath;
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}
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return nil;
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}
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//NotificationContants_Advertise_Key
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- (void)adClick:(NSNotification *)noti
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{
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NSString *url = @"https://github.com/NJHu";
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if (!TWIsEmpty(url)) {
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if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:url]]) {
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[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url] options:@{@"username" : @"njhu"} completionHandler:^(BOOL success) {
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NSLog(@"%zd", success);
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}];
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}
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}
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}
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- (void)dealloc {
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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@end
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