如何将从相机捕获的图像快速保存到相册

if (imageDataSampleBuffer != NULL) {

    NSData *imageData = [AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

    UIImage *image = [[UIImage alloc] initWithData:imageData];
    NSLog(@\"capturestill image size is %@\", NSStringFromCGSize(image.size));
    [library writeImageToSavedPhotosAlbum:[image CGImage]
        orientation:(ALAssetOrientation)[image imageOrientation]
        completionBlock:completionBlock];
    [image release];

    [library release];
}