objective-c - iOS PHAsset对象如何本地保存

Question

现需功能：选择的本地相册照片上传，如果上传过程中中断。下次开启程序可以继续上传任务。
遇到问题：选择的本地照片数据PHAsset不遵守NSCoding协议，无法归档。寻求本地保存的方案。或者此功能更好的解决方案。
感谢！

Answer 1

If you can’t save it directly, just find a mark and record it. Next time, use this mark to filter and get the original object.
So I looked for the documentation and there happened to be something like this:

• (PHFetchResult<PHAsset > )fetchAssetsWithLocalIdentifiers:(NSArray<NSString > )identifiers options:(nullable PHFetchOptions *)options;

identifiers just pass the localIdentifier of PHAsset:
@property (nonatomic, copy, readonly) NSString *localIdentifier;

Save the localIdentifier and use this to filter next time you open it

Answer 2

To prevent the picture from being deleted, the best solution is to move it to the app’s file directory. Just remove it after uploading.

Answer 3

Owner, I also encountered the same problem, please tell me how to solve it.