首页 / 移动开发 / IOS / 扫描二维码控件的封装iOS实现

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

//// 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

//// 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:selfselector:@selector（notificationCenterEvent:） name:AVCaptureInputPortFormatDescriptionDidChangeNotificationobject: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 BOOLresult = 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 *）metadataObjectsfromConnection:（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