扫描相册中的二维码

直接上代码：

0.代理协议 

UIImagePickerControllerDelegate, UINavigationControllerDelegate

1.定义

@property (strong, nonatomic) CIDetector *detector;

2.“相册”按钮的点击事件

-(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];

}

　　

 

3.照片选择后的代理方法

- ( 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;
        }
       // 分析扫描结果      
        [self analyzeQRCode:typeArray];
    }
}