iphone – 你如何使用AVCaptureStillImageOutput,captureStillImageAsynchronouslyFromConnection？

概述如何设置完成处理程序： captureStillImageAsynchronouslyFromConnection：completionHandler： for AVCaptureStillImageOutput？ >(void)captureDelegate：(CMSampleBufferRef)缓冲区错误：(NSError *)错误; ？ 使用块. 像这样的东西： [[self stillIm 如何设置完成处理程序：

captureStillImageAsynchronouslyFromConnection：completionHandler：

for AVCaptureStillimageOutput？

>(voID)captureDelegate：(CMSampleBufferRef)缓冲区错误：(NSError *)错误;

？

解决方法 使用块.
像这样的东西：

[[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];                                                             }                                                         }                                                     }];

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