Question

我正在尝试将UIImage保存到相册。我已经尝试过最后一种方法：

-(IBAction)captureLocalImage:(id)sender{

[photoCaptureButton setEnabled:NO];

// Save to assets library
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

[library writeImageToSavedPhotosAlbum: imageView.image.CGImage metadata:nil completionBlock:^(NSURL *assetURL, NSError *error2)
 {
     //             report_memory(@"After writing to library");
     if (error2) {
         NSLog(@"ERROR: the image failed to be written");
     }
     else {
         NSLog(@"PHOTO SAVED - assetURL: %@", assetURL);
     }

     runOnMainQueueWithoutDeadlocking(^{
         //                 report_memory(@"Operation completed");
         [photoCaptureButton setEnabled:YES];
     });
 }];  

}

imageView是一个UIImageView，它包含我要保存的图像。在日志中我得到了“PHOTO SAVED - assetURL：（null）”，照片没有保存到图书馆。

我做错了什么？

Answer 1

只需使用此波纹管线即可保存照片库中的图像

UIImageWriteToSavedPhotosAlbum(imageView.image,nil,nil,nil);

：）

Answer 2

查看此sample ..其中介绍了如何使用资源库保存照片..

你甚至可以使用..

UIImageWriteToSavedPhotosAlbum(UIImage *image, id completionTarget, SEL completionSelector, void *contextInfo);

了解他的链接How to save picture to iPhone photo library?

Answer 3

我使用GPUImage，显然库本身存在某种问题。

上面的代码绝对有用。如果您想了解有关此问题的更多信息：

GPUImagePicture with imageFromCurrentlyProcessedOutput doesn't get UIImage

Answer 4

对于iOS 11+需要隐私 - 照片库添加使用说明 info.plist

在info.plist中添加 NSPhotoLibraryAddUsageDescription

代码：

UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

Reference

Answer 5

由于iOS 8.1 UIKit框架具有UishmageWriteToSavedPhotosAlbum（）函数，因为vishy说。

我以这种方式使用它：

 UIImageWriteToSavedPhotosAlbum(myImage, self, "image:didFinishSavingWithError:contextInfo:", nil)

然后

func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
    // check error, report image has been saved, ...
}

Answer 6

从相机拍摄照片时，您可以将图像保存在选择器代理中：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage *image = [info valueForKey:UIImagePickerControllerEditedImage];   
    [library writeImageToSavedPhotosAlbum:image.CGImage metadata:[info objectForKey:UIImagePickerControllerMediaMetadata] completionBlock:^(NSURL *assetURL, NSError *error) {
...
    }];



    [picker dismissViewControllerAnimated:YES completion:nil];
}

使用writeImageToSavedPhotosAlbum将UIImage保存到相册

6 个答案: