xcode 您如何使用 AVCaptureStillImageOutput，尤其是 captureStillImageAsynchronouslyFromConnection？
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时间：2020-09-14 19:41:38 来源:igfitidea点击:
How do you use AVCaptureStillImageOutput, captureStillImageAsynchronouslyFromConnection in particular?
提问by Shizam
How do you setup the completion handler for:
您如何设置完成处理程序：
captureStillImageAsynchronouslyFromConnection:completionHandler:
captureStillImageAsynchronouslyFromConnection:completionHandler:
for AVCaptureStillImageOutput?
对于 AVCaptureStillImageOutput？
- (void)captureDelegate:(CMSampleBufferRef)buffer error:(NSError *)error;
- (void)captureDelegate:(CMSampleBufferRef)buffer error:(NSError *)error;
?
?
回答by Nico Prananta
use block. something like this:
使用块。像这样：
[[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];
}
}
}];
