缺少“选择”选项以选择UIDocumentPickerViewController中的多个文件

Question

有谁知道为什么在Select中没有3 dots选项，就像在Files app中那样点击UIDocumentPickerViewController？即使multipleSelection设置为true。

我注意到它出现在模拟器上，但没有出现在真正的设备上。

private lazy var _documentPicker = UIDocumentPickerViewController(documentTypes: ["public.image",
         "public.audio",
         "public.movie",
         "public.text",
         "public.item",
         "public.content",
         "public.source-code"],
        in: .import)

private final func performDocumentsMenuOpen() {
        present(self._documentPicker, animated: true) {
            if #available(iOS 11.0, *) {
                self._documentPicker.allowsMultipleSelection = true
            } else {
                // Fallback on earlier versions
            }
        }
    }

​

​

Answer 1

固定在

在documentPicker

• changing中显示present(self._documentPicker, animated: true)

动画为false之前的

• moving allowsMultipleSelection = true