未调用 AppDelegate 的函数

Question

我的一个应用程序有问题。我注意到，当应用程序在后台运行时，我的控制器仍在更新。原因是 AppDelegate 的方法没有被调用，我找不到原因。

这是我的代码：

import UIKit
import Harmony

@UIApplicationMain
class AppDelegate : UIResponder
{
    var window: UIWindow?
    
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool
    {
        return true
    }
}

extension AppDelegate : UIApplicationDelegate
{
    func applicationDidBecomeActive(_ application: UIApplication)
    {
        Swift.print("applicationDidBecomeActive")
        Notifications.post(UIApplication.didBecomeActiveNotification.rawValue)
    }

    func applicationWillResignActive(_ application: UIApplication)
    {
        Swift.print("applicationWillResignActive")
        Notifications.post(UIApplication.willResignActiveNotification.rawValue)
    }

    func applicationWillEnterForeground(_ application: UIApplication)
    {
        Swift.print("applicationWillEnterForeground")
        Notifications.post(UIApplication.willEnterForegroundNotification.rawValue)
    }
}

我尝试了以下方法：

使用真实设备和模拟器。
重新启动 Xcode，清理构建文件夹。
清理 Developer 文件夹
不要使用扩展程序。
调试或发布方案

没有任何效果，方法仍然没有被调用，我想知道为什么？

Answer 1

如果您将 ios 13 与场景委托一起使用..所有功能都转移到场景委托中而不是 AppDelegate

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?


    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).
        guard let _ = (scene as? UIWindowScene) else { return }
    }

    func sceneDidDisconnect(_ scene: UIScene) {
        // Called as the scene is being released by the system.
        // This occurs shortly after the scene enters the background, or when its session is discarded.
        // Release any resources associated with this scene that can be re-created the next time the scene connects.
        // The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
    }

    func sceneDidBecomeActive(_ scene: UIScene) {
        // Called when the scene has moved from an inactive state to an active state.
        // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
    }

    func sceneWillResignActive(_ scene: UIScene) {
        // Called when the scene will move from an active state to an inactive state.
        // This may occur due to temporary interruptions (ex. an incoming phone call).
    }

    func sceneWillEnterForeground(_ scene: UIScene) {
        // Called as the scene transitions from the background to the foreground.
        // Use this method to undo the changes made on entering the background.
    }

    func sceneDidEnterBackground(_ scene: UIScene) {
        // Called as the scene transitions from the foreground to the background.
        // Use this method to save data, release shared resources, and store enough scene-specific state information
        // to restore the scene back to its current state.
    }


}

未调用 AppDelegate 的函数

Functions of AppDelegate not being called

xcode

uiviewcontroller

ios

swift

uiscenedelegate