“AppDelegate"类型的值没有成员“window" [英] Value of type 'AppDelegate' has no member 'window'

问题描述

我正在尝试使用 3D 触摸快速操作，我正在设置它复制 VEA 软件代码.在他的示例代码中，它工作得很好，但是当我尝试将它添加到我的应用程序时，我遇到了一些不寻常的错误.我是编码和快速的新手，所以请尽可能多地解释.谢谢.下面是我的应用程序委托中的代码.

Im trying to use the 3D touch Quick Actions and I'm setting it up copying VEA Software code. In his sample code it works perfectly but when I try to add it to my app I get some unusual errors. I am new to coding and swift so please explain as much as possible. Thanks. Below I have the code which is in my app delegate.

这是我收到错误的地方 (self.window?):

This is where I'm getting the error (self.window?):

@available(iOS 9.0, *)
func handleShortcutItem(shortcutItem: UIApplicationShortcutItem) -> Bool
{
var handled = false
var window: UIWindow?

guard ShortcutIdentifier(fullType: shortcutItem.type) != nil else { return false }
guard let shortcutType = shortcutItem.type as String? else { return false }

switch (shortcutType)
{
case ShortcutIdentifier.First.type:
    handled = true
    var window = UIWindow?()

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let navVC = storyboard.instantiateViewControllerWithIdentifier("ProjectPage") as! UINavigationController
    // Error on line below
    self.window?.rootViewController?.presentViewController(navVC, animated: true, completion: nil)


    break
case ShortcutIdentifier.Second.type:
    handled = true

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let navVC = storyboard.instantiateViewControllerWithIdentifier("ContactPageView") as! UINavigationController
    // Error on line below
    self.window?.rootViewController?.presentViewController(navVC, animated: true, completion: nil)
    break

case ShortcutIdentifier.Third.type:
    handled = true

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let navVC = storyboard.instantiateViewControllerWithIdentifier("ViewController") as! UINavigationController
    // Error on line below
    self.window?.rootViewController?.presentViewController(navVC, animated: true, completion: nil)
    break


default:
    break
}

return handled

}

推荐答案

在 iOS 13、Xcode 11 中，sceneDelegate 处理 UIScene 和 window 的功能.窗口在sceneDelegate 中使用时正常执行.

In iOS 13, Xcode 11, the sceneDelegate handles the functionality of UIScene and window. The window performs properly when used in the sceneDelegate.

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