drag and drop: drop Pages/Numbers/… | Apple Developer Forums

drag and drop: drop Pages/Numbers/Keynote files

Hi everyone,

Recently I am developing Drag&Drop function on iPad and met a problem: I can not get Pages/Numbers/Keynote files from performDrop in UIDropInteractionDelegate. Here is my solution:

1. Create my own file item provider, follow the protocol NSItemProviderReading.

2. override method readableTypeIdentifiersForItemProvider, register UTI of iWorks files which are com.apple.iwork.pages.sffpages, com.apple.iwork.numbers.sffnumbers and com.apple.keynote.key. I got those UTI from [[NSWorkspace sharedWorkspace] typeOfFile:filePath error:nil]

3. override + (instancetype)objectWithItemProviderData:(NSData *)data typeIdentifier:(NSString *)typeIdentifier error:(NSError * _Nullable __autoreleasing*)outError

4. implement canHandleSession of UIDropInteractionDelegate and return [session canLoadObjectsOfClass:[DTFileItemProvider class]]

I do the same thing on office files, and it work very well, I can get file's data in performDrop. But iWorks file are not.

So did I set the wrong UTI or something?