UIDocumentInteractionController 不显示基于 UTI 的应用程序

Question

我想在 iBooks 应用程序中读取 .epub 文件，因此我使用 UIDocumentInteractionController 在 iBooks 中打开 .epub 文件。一切正常，但我只想在 UIDocumentInteractionController 中显示 iBooks 应用程序而不是其他应用程序，所以我为 iBooks 添加了 UTI但它仍然显示下面的所有应用程序是我的代码。

 var sharingController = UIDocumentInteractionController()
  sharingController.url = url
  sharingController.uti = "com.apple.iBooks"
  sharingController.name = url.lastPathComponent
  sharingController.presentOptionsMenu(from: view.frame, in: view, animated: true)

Answer 1

UTI 不是包标识符，而是内容的统一类型标识符。

试试下面的

sharingController.uti = "org.idpf.epub-container"

或使用 MobileCoreServices 中的常量

import MobileCoreServices

...
sharingController.uti = kUTTypeElectronicPublication as String

更新： 顺便说一句，上面提供的（和其他）选项不会限制调用的选项对话框（见下文），因为它确定了所有能够快速查看、复制、文件的打开等

// This is the default method you should call to give your users the option to quick look, open, or copy the document.
// Presents a menu allowing the user to Quick Look, open, or copy the item specified by URL.
// This automatically determines the correct application or applications that can open the item at URL.
// Returns NO if the options menu contained no options and was not opened.
// Note that you must implement the delegate method documentInteractionControllerViewControllerForPreview: to get the Quick Look menu item.
open func presentOptionsMenu(from rect: CGRect, in view: UIView, animated: Bool) -> Bool

如果你需要open，只有菜单的内容会更短，只支持epub的读者。

// Presents a menu allowing the user to open the document in another application.  The menu
// will contain all applications that can open the item at URL.
// Returns NO if there are no applications that can open the item at URL.
open func presentOpenInMenu(from rect: CGRect, in view: UIView, animated: Bool) -> Bool