ios - 如何在 Flutter 插件中覆盖 iOS App 生命周期

Question

在我的 flutter 插件的 Swift 端，我需要覆盖 applicationDidBecomeActive 和 applicationWillResignActive 但我不知道该怎么做。

假设它只是一个普通的 flutter 应用程序，我会在 AppDelegate 中完成此操作:

   override func applicationDidBecomeActive(_ application: UIApplication) {

    }

    override func applicationWillResignActive(_ application: UIApplication) {

    }

但这似乎不适用于插件类。

请注意，我知道我可以使用 AppLifecycleState 来做到这一点在 Flutter 端，但正如我所说，在 Swift 端执行此操作很重要

Answer 1

您需要实现 FlutterApplicationLifeCycleDelegate 接口(interface)，并在您的 FlutterPlugin 类上使用 register 方法注册它。

OBS:FlutterPlugin类已经继承了FlutterApplicationLifeCycleDelegate接口(interface)，无需担心

第 1 步:将您的插件注册为 ApplicationDelegate 类:

public static func register(with registrar: FlutterPluginRegistrar) {
    let channel = FlutterMethodChannel(name: "my_wonderful_plugin_id", binaryMessenger: registrar.messenger())
    let instance = MyWonderfulPlugin() // YOUR PLUGGIN NAME INSTEAD

    registrar.addMethodCallDelegate(instance, channel: channel)
    registrar.addApplicationDelegate(instance) // THIS IS THE BIG SECRET
}

第 2 步:实现接口(interface)，包括插件类中的以下方法:

public func applicationDidBecomeActive(_ application: UIApplication) {
    debugPrint("applicationDidBecomeActive")
}

public func applicationWillTerminate(_ application: UIApplication) {
    debugPrint("applicationWillTerminate")
}

public func applicationWillResignActive(_ application: UIApplication) {
    debugPrint("applicationWillResignActive")
}

public func applicationDidEnterBackground(_ application: UIApplication) {
    debugPrint("applicationDidEnterBackground")
}

public func applicationWillEnterForeground(_ application: UIApplication) {
    print("applicationWillEnterForeground")
}

就是这样!雅虎!