//
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// HMScannerViewController.m
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// HMQRCodeScanner
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//
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// Created by 刘凡 on 16/1/2.
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// Copyright © 2016年 itheima. All rights reserved.
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//
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#import "HMScannerViewController.h"
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#import "HMScanerCardViewController.h"
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#import "HMScannerBorder.h"
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#import "HMScannerMaskView.h"
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#import "HMScanner.h"
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/// 控件间距
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#define kControlMargin 32.0
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/// 相册图片最大尺寸
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#define kImageMaxSize CGSizeMake(1000, 1000)
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@interface HMScannerViewController () <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
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/// 名片字符串
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@property (nonatomic) NSString *cardName;
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/// 头像图片
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@property (nonatomic) UIImage *avatar;
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/// 完成回调
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@property (nonatomic, copy) void (^completionCallBack)(NSString *);
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@end
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@implementation HMScannerViewController {
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/// 扫描框
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HMScannerBorder *scannerBorder;
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/// 扫描器
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HMScanner *scanner;
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/// 提示标签
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UILabel *tipLabel;
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}
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- (instancetype)initWithCardName:(NSString *)cardName avatar:(UIImage *)avatar completion:(void (^)(NSString *))completion {
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self = [super init];
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if (self) {
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self.cardName = cardName;
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self.avatar = avatar;
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self.completionCallBack = completion;
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}
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return self;
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}
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- (void)viewDidLoad {
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[super viewDidLoad];
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[self prepareUI];
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// 实例化扫描器
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__weak typeof(self) weakSelf = self;
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scanner = [HMScanner scanerWithView:self.view scanFrame:scannerBorder.frame completion:^(NSString *stringValue) {
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// 完成回调
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weakSelf.completionCallBack(stringValue);
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// 关闭
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[weakSelf clickCloseButton];
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}];
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}
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- (void)viewWillAppear:(BOOL)animated {
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[super viewWillAppear:animated];
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[scannerBorder startScannerAnimating];
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[scanner startScan];
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}
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- (void)viewWillDisappear:(BOOL)animated {
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[super viewWillDisappear:animated];
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[scannerBorder stopScannerAnimating];
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[scanner stopScan];
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}
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#pragma mark - 监听方法
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/// 点击关闭按钮
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- (void)clickCloseButton {
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[self dismissViewControllerAnimated:YES completion:nil];
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}
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/// 点击相册按钮
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- (void)clickAlbumButton {
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if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
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tipLabel.text = @"无法访问相册";
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return;
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}
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UIImagePickerController *picker = [[UIImagePickerController alloc] init];
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picker.view.backgroundColor = [UIColor whiteColor];
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picker.delegate = self;
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[self showDetailViewController:picker sender:nil];
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}
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/// 点击名片按钮
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- (void)clickCardButton {
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HMScanerCardViewController *vc = [[HMScanerCardViewController alloc] initWithCardName:self.cardName avatar:self.avatar];
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[self showViewController:vc sender:nil];
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}
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#pragma mark - UIImagePickerControllerDelegate
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- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {
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UIImage *image = [self resizeImage:info[UIImagePickerControllerOriginalImage]];
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// 扫描图像
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[HMScanner scaneImage:image completion:^(NSArray *values) {
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if (values.count > 0) {
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self.completionCallBack(values.firstObject);
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[self dismissViewControllerAnimated:NO completion:^{
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[self clickCloseButton];
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}];
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} else {
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tipLabel.text = @"没有识别到二维码，请选择其他照片";
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[self dismissViewControllerAnimated:YES completion:nil];
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}
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}];
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}
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- (UIImage *)resizeImage:(UIImage *)image {
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if (image.size.width < kImageMaxSize.width && image.size.height < kImageMaxSize.height) {
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return image;
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}
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CGFloat xScale = kImageMaxSize.width / image.size.width;
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CGFloat yScale = kImageMaxSize.height / image.size.height;
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CGFloat scale = MIN(xScale, yScale);
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CGSize size = CGSizeMake(image.size.width * scale, image.size.height * scale);
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UIGraphicsBeginImageContext(size);
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[image drawInRect:CGRectMake(0, 0, size.width, size.height)];
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UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return result;
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}
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#pragma mark - 设置界面
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- (void)prepareUI {
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self.view.backgroundColor = [UIColor darkGrayColor];
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[self prepareNavigationBar];
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[self prepareScanerBorder];
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[self prepareOtherControls];
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}
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/// 准备提示标签和名片按钮
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- (void)prepareOtherControls {
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// 1> 提示标签
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tipLabel = [[UILabel alloc] init];
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tipLabel.text = @"将二维码/条码放入框中，即可自动扫描";
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tipLabel.font = [UIFont systemFontOfSize:12];
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tipLabel.textColor = [UIColor whiteColor];
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tipLabel.textAlignment = NSTextAlignmentCenter;
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[tipLabel sizeToFit];
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tipLabel.center = CGPointMake(scannerBorder.center.x, CGRectGetMaxY(scannerBorder.frame) + kControlMargin);
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[self.view addSubview:tipLabel];
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// 2> 名片按钮
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UIButton *cardButton = [[UIButton alloc] init];
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[cardButton setTitle:@"我的名片" forState:UIControlStateNormal];
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cardButton.titleLabel.font = [UIFont systemFontOfSize:15];
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[cardButton setTitleColor:self.navigationController.navigationBar.tintColor forState:UIControlStateNormal];
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[cardButton sizeToFit];
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cardButton.center = CGPointMake(tipLabel.center.x, CGRectGetMaxY(tipLabel.frame) + kControlMargin);
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[self.view addSubview:cardButton];
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[cardButton addTarget:self action:@selector(clickCardButton) forControlEvents:UIControlEventTouchUpInside];
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}
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/// 准备扫描框
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- (void)prepareScanerBorder {
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CGFloat width = self.view.bounds.size.width - 80;
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scannerBorder = [[HMScannerBorder alloc] initWithFrame:CGRectMake(0, 0, width, width)];
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scannerBorder.center = self.view.center;
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scannerBorder.tintColor = self.navigationController.navigationBar.tintColor;
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[self.view addSubview:scannerBorder];
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HMScannerMaskView *maskView = [HMScannerMaskView maskViewWithFrame:self.view.bounds cropRect:scannerBorder.frame];
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[self.view insertSubview:maskView atIndex:0];
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}
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/// 准备导航栏
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- (void)prepareNavigationBar {
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// 1> 背景颜色
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[self.navigationController.navigationBar setBarTintColor:[UIColor colorWithWhite:0.1 alpha:1.0]];
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self.navigationController.navigationBar.translucent = YES;
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self.navigationController.navigationBar.shadowImage = [[UIImage alloc] init];
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// 2> 标题
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self.title = @"扫一扫";
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// 3> 左右按钮
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self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"关闭" style:UIBarButtonItemStylePlain target:self action:@selector(clickCloseButton)];
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self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"相册" style:UIBarButtonItemStylePlain target:self action:@selector(clickAlbumButton)];
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}
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@end
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