Come si usa AVCaptureStillImageOutput, captureStillImageAsynchronouslyFromConnection in particolare?

Question

Come si imposta il gestore di completamento per:

captureStillImageAsynchronouslyFromConnection: completionHandler:

per AVCaptureStillImageOutput?

• (void) captureDelegate: errore del buffer (CMSampleBufferRef): errore (NSError *);

?

Answer 1

utilizzare il blocco. qualcosa di simile:

[[self stillImageOutput] captureStillImageAsynchronouslyFromConnection:videoConnection 
                completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) { 
                 if (imageDataSampleBuffer != NULL) { 
                  NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer]; 
                  UIImage *image = [[UIImage alloc] initWithData:imageData];                 
                  ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init]; 
                  [library writeImageToSavedPhotosAlbum:[image CGImage] 
                         orientation:(ALAssetOrientation)[image imageOrientation] 
                        completionBlock:^(NSURL *assetURL, NSError *error){ 
                         if (error) { 
                          id delegate = [self delegate]; 
                          if ([delegate respondsToSelector:@selector(captureStillImageFailedWithError:)]) { 
                           [delegate captureStillImageFailedWithError:error]; 
                          }                        
                         } 
                        }]; 
                  [library release]; 
                  [image release]; 
                 } else if (error) { 
                  id delegate = [self delegate]; 
                  if ([delegate respondsToSelector:@selector(captureStillImageFailedWithError:)]) { 
                   [delegate captureStillImageFailedWithError:error]; 
                  } 
                 } 
                }];