摘要:本文将带你了解IOS源码之实现二维码的扫描功能,希望本文对大家学IOS有所帮助。
ViewController.m // QRCode // // Created by chenchen on 15/7/30. // Copyright (c) 2015年 BSY. All rights reserved. // #<d>import</d> <AVFoundation/AVFoundation.h> #<d>import</d> "ViewController.h" @interface ViewController ()<AVCapture<d>Meta</d>dataOutputObjectsDelegate> @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; AVCaptureSession *session = [[AVCaptureSession alloc] init]; AVCaptureDevice *device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]; NSError *error = nil; AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:device error:&error]; if (input) { [session addInput:input]; } else { NSLog(@"Error: %@", error); } AVCapture<d>Meta</d>dataOutput *output = [[AVCapture<d>Meta</d>dataOutput alloc] init]; //设置扫码支持的编码格式(如下设置条形码和二维码兼容) [output set<d>Meta</d>dataObjectTypes:@[AV<d>Meta</d>dataObjectTypeQRCode,AV<d>Meta</d>dataObjectTypeEAN13Code, AV<d>Meta</d>dataObjectTypeEAN8Code, AV<d>Meta</d>dataObjectTypeCode128Code]]; [output set<d>Meta</d>dataObjectsDelegate:self queue:dispatch_get_main_queue()]; [session addOutput:output]; [session startRunning]; } #pragma mark - AVCapture<d>Meta</d>dataOutputObjectsDelegate - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutput<d>Meta</d>dataObjects:(NSArray *)<d>meta</d>dataObjects fromConnection:(AVCaptureConnection *)connection { NSString *QRCode = nil; for (AV<d>Meta</d>dataObject *<d>meta</d>data in <d>meta</d>dataObjects) { if ([<d>meta</d>data.type isEqualToString:AV<d>Meta</d>dataObjectTypeQRCode]) { // This will never happen; nobody has ever scanned a QR code... ever QRCode = [(AV<d>Meta</d>dataMachineReadableCodeObject *)<d>meta</d>data stringValue]; break; } } NSLog(@"QR Code: %@", QRCode); } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
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