斯威夫特使用警报导航

Question

我可以使用一些建议来获得我的导航链接，以提醒我工作。该代码是正确的，我收到一条错误消息，提示“未使用'NavigationLink'初始化程序的结果”。

@State private var mainScreenReturn = false
@State private var gameOver = false

.alert(isPresented: $gameOver) {
                Alert(title: Text("Game Over"), message: Text("Tighten Up!"), primaryButton: .destructive(Text("Main Menu")) {
                    self.mainMenu()
                    }, secondaryButton: .default(Text("Play Again"), action: { self.playAgain() }))
        }

func mainMenu() {
        DispatchQueue.main.async {
            self.mainScreenReturn = true
        }
        NavigationLink(destination: ContentView(), isActive: self.$mainScreenReturn,
                       label: { EmptyView() })

    }

func playAgain() {

        // reset timer and score
        self.timeRemaining = 2; self.score = 0

    }

func endGame() {

        // warm up haptics
        self.feedBack.prepare()
        // vibrate 
        self.feedBack.notificationOccurred(.error)
        // show game over alert
        self.gameOver = true
        // set time to 0
        self.timeRemaining = 0
        // play sound file
        playSound(sound: "CasingDrop", type: "wav")
    }

我也试图将导航链接移到视图正下方但同样的问题。

var body: some View {
NavigationView {
            ZStack {
        NavigationLink(destination: ContentView(), isActive: self.$mainScreenReturn,
        label: { EmptyView() })
        }
        }

提前谢谢！