直接上代码，就不多废话了
// // ViewController.m // QRCode // // Created by chenchen on 15/7/30. // Copyright (c) 2015年 BSY. All rights reserved. // #import <AVFoundation/AVFoundation.h> #import "ViewController.h" @interface ViewController ()<AVCaptureMetadataOutputObjectsDelegate> @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); } AVCaptureMetadataOutput *output = [[AVCaptureMetadataOutput 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 setMetadataObjectTypes:@[AVMetadataObjectTypeQRCode,AVMetadataObjectTypeEAN13Code, AVMetadataObjectTypeEAN8Code, AVMetadataObjectTypeCode128Code]]; [output setMetadataObjectsDelegate:self queue:dispatch_get_main_queue()]; [session addOutput:output]; [session startRunning]; } #pragma mark - AVCaptureMetadataOutputObjectsDelegate - (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputMetadataObjects:(NSArray *)metadataObjects fromConnection:(AVCaptureConnection *)connection { NSString *QRCode = nil; for (AVMetadataObject *metadata in metadataObjects) { if ([metadata.type isEqualToString:AVMetadataObjectTypeQRCode]) { // This will never happen; nobody has ever scanned a QR code... ever QRCode = [(AVMetadataMachineReadableCodeObject *)metadata stringValue]; break; } } NSLog(@"QR Code: %@", QRCode); } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
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