UIDocumentMenuViewController 关闭呈现视图控制器

Question

我有一个VC"A"，它以模式呈现VC"B"。B 呈UIDocumentMenuViewControllerUIDocumentMenuDelegate协议在 B 中实现。

一旦documentMenuWasCancelled(_ documentMenu:)或documentMenu(_:didPickDocumentPicker:)被召唤，B的dismiss(animated:completion:)就会被召唤，我不知道为什么。

这是我的代码

func presentDocumentPicker() {
    let documentTypes = [
        kUTTypeCompositeContent as String,
        kUTTypePDF as String,
        "com.microsoft.word.doc",
        "vnd.openxmlformats-officedocument.wordprocessingml.document"
    ]
    let documentMenuViewController = UIDocumentMenuViewController(documentTypes: documentTypes, in: .import)
    documentMenuViewController.delegate = self
    present(documentMenuViewController, animated: true, completion: nil)
}
// MARK: - Document Menu View Controller Delegate
func documentMenu(_ documentMenu: UIDocumentMenuViewController, didPickDocumentPicker documentPicker: UIDocumentPickerViewController) {
    print("did pick")
}
func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
    print("was cancelled")
}

如您所见，我在实现的委托函数中什么都不做。B仍然被解雇。我不明白。

Answer 1

这是

由单击操作或取消UIDocumentMenuViewController时调用documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL)方法引起的。

我在这里发布了一个解决方案：https://stackoverflow.com/a/45505488/6381503

希望对您有所帮助。