效果
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#import@classQRCodeView;@protocolQRCodeViewDelegate @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@interfaceQRCodeView : UIView/**
* 代理*/@property (nonatomic, weak)iddelegate;/**
* 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"@interfaceQRCodeView () @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@implementationQRCodeView-(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];
}returnself;
}#pragmamark - NSNotificationCenter related.- (void)addNotificationCenter {
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(notificationCenterEvent:)
name:AVCaptureInputPortFormatDescriptionDidChangeNotificationobject:nil];
}- (void)removeNotificationCenter {
[[NSNotificationCenter defaultCenter] removeObserver:self
name:AVCaptureInputPortFormatDescriptionDidChangeNotificationobject: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);
}
}#pragmamark - 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);returnresult;
}//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;returnresult;
}- (void)stop {
[self.captureSession stopRunning];
self.isRunning=NO;
self.captureSession=nil;
}#pragmamark - 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];
}
}
}
}#pragmamark - Setter & Getter.- (void)setTorchMode:(AVCaptureTorchMode)torchMode {
_torchMode=torchMode;if(_deviceInput &&[self.captureDevice hasTorch]) {
[self.captureDevice lockForConfiguration:nil];
[self.captureDevice setTorchMode:torchMode];
[self.captureDevice unlockForConfiguration];
}
}#pragmamark - System method.- (void)dealloc {
[self stop];
[self removeNotificationCenter];
}@end
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