SwiftUI 应用生命周期 iOS14 AppDelegate 代码放哪里

发布于06月23日

既然AppDelegate和SceneDelegate已经从SwiftUI中删除了，我应该把我以前在SceneDelegate和AppDelegate中的代码放在哪里，Firebase config for ex？

所以我的AppDelegate码中有这样的代码:

我现在应该把这个代码放在哪里？

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    // Override point for customization after application launch.
    
    FirebaseConfiguration.shared.setLoggerLevel(.min)
    FirebaseApp.configure()
    return true
}

推荐答案

下面是一个针对SwiftUI生命周期的解决方案.使用Xcode 12b/iOS 14进行测试

import SwiftUI
import UIKit

// no changes in your AppDelegate class
class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        print(">> your code here !!")
        return true
    }
}

@main
struct Testing_SwiftUI2App: App {

    // inject into SwiftUI life-cycle via adaptor !!!
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}