保存图片至相册

点击按钮，将self.imageView上面的image内容保存到本地相册，并指定判断保存成功与否的方法imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:

- (IBAction)saveImageToAlbum:(id)sender {

UIImageWriteToSavedPhotosAlbum(self.imageView.image, self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:), nil);

}

实现imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:方法

- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo

{

NSString *message = @"呵呵";

if (!error) {

message = @"成功保存到相册";

}else

{

message = [error description];

}

NSLog(@"message is %@",message);

}