iOS 照片框架 : how to revert image asset to original

Question

所有在线文档和示例都展示了如何使用 PHContentEditingInput 和 PHContentEditingOutput 编辑/更改 Assets 。我没有找到任何关于将图像重置或恢复为原始图像的信息。任何写入 renderedContentURL 的内容都被视为编辑，所以这不是我想要的。在这里分享我的发现:

Answer 1

使用revertAssetContentToOriginal

swift :

    PHPhotoLibrary.shared().performChanges({
        let request = PHAssetChangeRequest(for:asset)
        request.revertAssetContentToOriginal()
    }, completionHandler: { success, error in
        if !success { print("can't revert asset: \(error)") }
    })

Objective-C :

     [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
         PHAssetChangeRequest *change = [PHAssetChangeRequest changeRequestForAsset:asset];
         [change revertAssetContentToOriginal];
     } completionHandler:^(BOOL success, NSError *error) {
         NSLog(@"Finished adding asset. %@", (success ? @"Success" : error));
     }];