ios自带的二维码扫描（ios内建扫描二维码）

扫描二维码效果

源码：https://github.com/YouXianMing/Animations

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 // // QRCodeView.h // QRCode // // Created by YouXianMing on 16/7/7. // Copyright © 2016年 XianMing You. All rights reserved. // #import <UIKit/UIKit.h> #import <AVFoundation/AVFoundation.h> @class QRCodeView; @protocol QRCodeViewDelegate <NSObject> @optional /** * 获取QR的扫描结果 * * @param codeView QRCodeView实体对象 * @param codeString 扫描字符串 */ - (void)QRCodeView:(QRCodeView *)codeView codeString:(NSString *)codeString; @end @interface QRCodeView : UIView /** * 代理 */ @property (nonatomic, weak) id <QRCodeViewDelegate> delegate; /** * 灯的状态,默认为关闭 */ @property (nonatomic) AVCaptureTorchMode torchMode; /** * 敏感区域,如果不设置,则为全部扫描区域 */ @property (nonatomic) CGRect interestArea; /** * 你用来添加自定义控件的view,尺寸与当前初始化的view一致 */ @property (nonatomic, strong) UIView *contentView; /** * 正在运行当中 */ @property (nonatomic, readonly) BOOL isRunning; /** * 开始扫描 * * @return 如果成功,则返回YES,否则返回NO */ - (BOOL)start; /** * 结束扫描 */ - (void)stop; @end

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 // // QRCodeView.m // QRCode // // Created by YouXianMing on 16/7/7. // Copyright © 2016年 XianMing You. All rights reserved. // #import "QRCodeView.h" @interface QRCodeView () <AVCaptureMetadataOutputObjectsDelegate> @property (nonatomic) BOOL isRunning; @property (nonatomic, strong) UIView *videoView; @property (nonatomic, strong) AVCaptureDeviceInput *deviceInput; @property (nonatomic, strong) AVCaptureDevice *captureDevice; @property (nonatomic, strong) AVCaptureSession *captureSession; @property (nonatomic, strong) AVCaptureVideoPreviewLayer *videoPreviewLayer; @property (nonatomic, strong) AVCaptureMetadataOutput *captureMetadataOutput; @end @implementation QRCodeView - (instancetype)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { self.videoView = [[UIView alloc] initWithFrame:self.bounds]; [self addSubview:self.videoView]; self.contentView = [[UIView alloc] initWithFrame:self.bounds]; [self addSubview:self.contentView]; self.captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; _torchMode = AVCaptureTorchModeOff; [self addNotificationCenter]; } return self; } #pragma mark - NSNotificationCenter related. - (void)addNotificationCenter { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(notificationCenterEvent:) name:AVCaptureInputPortFormatDescriptionDidChangeNotification object:nil]; } - (void)removeNotificationCenter { [[NSNotificationCenter defaultCenter] removeObserver:self name:AVCaptureInputPortFormatDescriptionDidChangeNotification object:nil]; } - (void)notificationCenterEvent:(NSNotification *)sender { if (self.interestArea.size.width && self.interestArea.size.height) { self.captureMetadataOutput.rectOfInterest = [self.videoPreviewLayer metadataOutputRectOfInterestForRect:self.interestArea]; } else { self.captureMetadataOutput.rectOfInterest = CGRectMake(0, 0, 1, 1); } } #pragma mark - Start & Stop. - (BOOL)start { // 初始化输入流 BOOL result = NO; NSError *error = nil; self.deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:self.captureDevice error:&error]; if (self.deviceInput == nil) { NSLog(@"%@", error); return result; } // 创建会话 self.captureSession = [[AVCaptureSession alloc] init]; // 添加输入流 [self.captureSession addInput:self.deviceInput]; // 初始化输出流 self.captureMetadataOutput = [[AVCaptureMetadataOutput alloc] init]; // 添加输出流 [self.captureSession addOutput:self.captureMetadataOutput]; // 创建queue. [self.captureMetadataOutput setMetadataObjectsDelegate:self queue:dispatch_queue_create(nil, nil)]; self.captureMetadataOutput.metadataObjectTypes = @[AVMetadataObjectTypeQRCode]; // 创建输出对象 self.videoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:self.captureSession]; self.videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill; self.videoPreviewLayer.frame = self.contentView.bounds; [self.videoView.layer addSublayer:self.videoPreviewLayer]; // 开始 [self.captureSession startRunning]; self.isRunning = YES; result = YES; return result; } - (void)stop { [self.captureSession stopRunning]; self.isRunning = NO; self.captureSession = nil; } #pragma mark - AVCaptureMetadataOutputObjectsDelegate - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection { if (metadataObjects.count > 0) { AVMetadataMachineReadableCodeObject *metadata = metadataObjects.firstObject; NSString *result = nil; if ([metadata.type isEqualToString:AVMetadataObjectTypeQRCode]) { result = metadata.stringValue; if (_delegate && [_delegate respondsToSelector:@selector(QRCodeView:codeString:)]) { [_delegate QRCodeView:self codeString:result]; } } } } #pragma mark - Setter & Getter. - (void)setTorchMode:(AVCaptureTorchMode)torchMode { _torchMode = torchMode; if (_deviceInput && [self.captureDevice hasTorch]) { [self.captureDevice lockForConfiguration:nil]; [self.captureDevice setTorchMode:torchMode]; [self.captureDevice unlockForConfiguration]; } } #pragma mark - System method. - (void)dealloc { [self stop]; [self removeNotificationCenter]; } @end