resizeAspectFill scanView.layer.addSublayer(previewLayer) 1.3 开始扫描 Tips: 不能在主线程中扫描,否则会无法响应用户操作,导致卡死现象 代码语言:javascript 复制 DispatchQueue.global(qos: .userInitiated).async { self.captureSession.startRunning() } 1.4 处理扫描结果 遵循AVCaptureMetadataOutputObjects...
QR codes are everywhere nowadays, from rental bikes to trains, posters, and more. Once upon a time in iOS, you had to download and open an app to scan a QR code, but a few years ago Apple integrated it into the camera app to make life easier for all of us! We’ll start inSetti...
#import "LWQRCodeScanView.h" @interface LWQRCodeScanView() //记录当前线条绘制的位置 @property (nonatomic,assign) CGPoint position; // 定时器 @property (nonatomic,strong)NSTimer *timer; //横线 @property (nonatomic,strong)UIImageView *lineImage; @end @implementation LWQRCodeScan...
CGFloat scanWH = 220; CGFloat scanX = (kScreenWidth - scanWH) * 0.5; CGFloat scanY = (kScreenHeight - scanWH) * 0.5; self.scanRect = CGRectMake(scanX, scanY, scanWH, scanWH); AVAuthorizationStatus status = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo]; if (sta...
- (NSString *)messageFromQRCodeImage:(UIImage *)image{ if (!image) { return nil; } //创建上下文 CIContext *context = [CIContext contextWithOptions:nil]; //识别类型设置为二维码,精度设为高 CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:context options:@{CIDetecto...
-(void)creatScanQR{/** 创建输入数据源 */AVCaptureDevice*device = [AVCaptureDevicedefaultDeviceWithMediaType:AVMediaTypeVideo];//获取摄像设备self.input = [AVCaptureDeviceInputdeviceInputWithDevice:device error:nil];//创建输出流/** 创建输出数据源 */self.output = [[AVCaptureMetadataOutputalloc] ...
@IBAction func startScan(_ sender: Any) { session.startRunning() } “` 7. 运行项目 最后,我们可以运行项目,测试扫描功能是否正常。 三、总结 iOS 扫一扫是一种常见的功能,它可以通过摄像头将二维码或条形码扫描并识别出来,然后进行相应的操作。在本文中,我们详细介绍了 iOS 扫一扫的原理和开发过程。通过本文...
@IBAction func startScan(_ sender: Any) { session.startRunning() } “` 7. 运行项目 最后,我们可以运行项目,测试扫描功能是否正常。 三、总结 iOS 扫一扫是一种常见的功能,它可以通过摄像头将二维码或条形码扫描并识别出来,然后进行相应的操作。在本文中,我们详细介绍了 iOS 扫一扫的原理和开发过程。通过本文...
@IBAction func startScan(_ sender: Any) { session.startRunning() } 7. 运行项目 最后,我们可以运行项目,测试扫描功能是否正常。 三、总结 iOS 扫一扫是一种常见的功能,它可以通过摄像头将二维码或条形码扫描并识别出来,然后进行相应的操作。在本文中,我们详细介绍了 iOS 扫一扫的原理和开发过程。通过本文的学习...
Scan QR Code To scan a QR code to open files or links, do the following: Point the camera toward any QR code (for example, on a web page or on a business card) and hold your iPhone steady during the scan. When the link is recognized, tap eitherCopy,Open, orNote. ...