直接上代碼：

0.代理協議?

UIImagePickerControllerDelegate, UINavigationControllerDelegate

1.定義

@property (strong, nonatomic) CIDetector *detector;

2.“相冊”按鈕的點擊事件

-(void)clickRightBarButton:(UIBarButtonItem*)item{self.detector = [CIDetector detectorOfType:CIDetectorTypeQRCode context:nil options:@{ CIDetectorAccuracy : CIDetectorAccuracyHigh }];UIImagePickerController *picker = [[UIImagePickerController alloc] init];picker.delegate = self;picker.allowsEditing = NO;picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;[self.navigationController presentViewController:picker animated:YES completion:nil];}

　　

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3.照片選擇后的代理方法

- ( void )imagePickerController:( UIImagePickerController *)picker didFinishPickingMediaWithInfo:( NSDictionary *)info {[picker dismissViewControllerAnimated:YES completion:nil];UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];if (!image){image = [info objectForKey:UIImagePickerControllerOriginalImage];}NSArray *features = [self.detector featuresInImage:[CIImage imageWithCGImage:image.CGImage]];if (features.count >=1) {CIQRCodeFeature *feature = [features objectAtIndex:0];NSString *scannedResult = feature.messageString;NSLog(@" ---- %@", scannedResult);NSArray *typeArray = [scannedResult componentsSeparatedByString:@","];if (typeArray.count <= 0) {return;}// 分析掃描結果 [self analyzeQRCode:typeArray];} }

　　

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轉載于:https://www.cnblogs.com/yangzhifan/p/4950053.html

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