我的app在UIDocumentPickerViewController上崩溃了

I am working on file sharing on my iOS App, I am new to UIDocumentPickerViewController. I do not know why my app is crashing.

我在iOS应用上做文件共享，我是UIDocumentPickerViewController新手。我不知道为什么我的应用程序会崩溃。

UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"public.image"] inMode:UIDocumentPickerModeImport];
documentPicker.delegate = self;
documentPicker.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentViewController:documentPicker animated:YES completion:nil];

App is crashing on the highlighted lines.

应用程序正在突出显示的行上崩溃。

Has anyone done this previously? I want to do the same like the attachment below

以前有人这样做过吗?我想做的和下面的附件一样

4 个解决方案

#1

See Prerequisite section on Apple Documentation:

有关苹果文档的前提部分:

Before your app can use the document picker, you must turn on the iCloud Documents capabilities in Xcode

在应用程序使用文档选择器之前，必须在Xcode中打开iCloud文档功能

Let me know if this solve your problem!

如果这能解决你的问题，请告诉我!

#2

Even with all entitlements set up, this still happens every now and then, when running on a device (not simulator).
The best solution I've found so far is:

即使设置了所有的权限，当在设备上运行(不是模拟器)时，这种情况仍然时有发生。到目前为止，我发现的最佳解决方案是:

1. Stop the app from Xcode.
2. 停止应用程序Xcode。
3. Launch the app from the device (tap the app icon on the home screen...)
4. 从设备上启动app(点击主屏幕上的app图标…)
5. Navigate in your app, in order to open the UIDocumentPickerViewController.
6. 在app中导航，以打开UIDocumentPickerViewController。
7. Once open, you can launch the app again in Xcode and UIDocumentPickerViewController will init as intended.
8. 一旦打开，你可以在Xcode中再次启动这个应用UIDocumentPickerViewController会按预期初始化。

From my experience, it will work until you install a TestFlight build. Sometimes you'll need to do this again after restarting Xcode.
This certainly looks like a bug with installing entitlements on the device.

根据我的经验，它将一直工作到您安装TestFlight构建。有时，在重新启动Xcode之后需要再次执行此操作。这看起来确实像一个在设备上安装权限的错误。

(Xcode 7.2, iOS 9.2)

(Xcode 7.2,iOS 9.2)

#3

UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:@[@"com.apple.iwork.pages.pages", @"com.apple.iwork.numbers.numbers", @"com.apple.iwork.keynote.key"] inMode:UIDocumentPickerModeImport];

#4

swift 3.0 you can select all document.

您可以选择所有的文档。

let documentPicker = UIDocumentPickerViewController(documentTypes: ["com.apple.iwork.pages.pages", "com.apple.iwork.numbers.numbers", "com.apple.iwork.keynote.key","public.image", "com.apple.application", "public.item","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"], in: .import)

    documentPicker.delegate = self
    present(documentPicker, animated: true, completion: nil)