How to initialise UIDocumentPickerViewController w

Question

I want to open UIDocumentPickerViewController and It should allow user to select all type of files. I tried to mention all UTIs in UIDocumentPickerViewController init method still couldnt find valid UTIs for some of files like rar,Visio files,mpp,mpt

UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:[MingleUtils allowedUTIs] inMode:UIDocumentPickerModeImport];

and

+(NSArray*)allowedUTIs{
    return @[@"public.data",@"public.content",@"public.audiovisual-content",@"public.movie",@"public.audiovisual-content",@"public.video",@"public.audio",@"public.text",@"public.data",@"public.zip-archive",@"com.pkware.zip-archive",@"public.composite-content",@"public.text"];
}

Answer 1

If you want to allow any file type, you should use

UIDocumentPickerViewController* documentPicker = 
  [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.data"]
                                                         inMode:UIDocumentPickerModeImport];

See apple docs for UTI concepts

Answer 2

UIDocumentPickerViewController* documentPicker = 
  [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.item"]
                                                         inMode:UIDocumentPickerModeImport];

Answer 3

I think your best shot is to use abstract UTI types.

Using kUTTypeContent and kUTTypeItem should cover most of the file types.