如何使用所有类型的UTI初始化UIDocumentPickerViewController

Question

我想打开UIDocumentPickerViewController，它应该允许用户选择所有类型的文件。我尝试在Visio init方法中提到所有的UTI仍然找不到一些文件的有效UTI，比如rar，UIDocumentPickerViewController文件，mpp，mpt

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

和

+(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

如果要允许任何文件类型，则应使用

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

请参阅UTI concepts的苹果文档

Answer 2

Swift 5：

import MobileCoreServices

    let importMenu = UIDocumentPickerViewController(documentTypes: ["public.item"], in: .import)
    importMenu.delegate = self
    importMenu.modalPresentationStyle = .fullScreen
    self.present(importMenu, animated: true, completion: nil)

Answer 3

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