Ios 视图之间的 SwiftUI 过渡，没有过渡

我想要在Gameview和MenuView之间转换，无论我做什么，我都看不到在模拟器或iPhone中的视图之间的转换.

这就是我在观点之间有条件的地方，也是我提到过渡的地方.

struct gameApp: App {
    @ObservedObject var appState = AppState(isGameActive: false)
    
    var body: some Scene {
        WindowGroup {
            
            if appState.isGameActive == false {
                MenuView()
                    .environmentObject(appState)
                    .transition(.move(edge: .trailing))
                    .animation(.default, value: appState.isGameActive)
            } else {
                GameView(difficulity: 1)
                    .transition(.move(edge: .trailing))
                    .animation(.default, value: appState.isGameActive)
            }
        }
    }
}

这里是切换视图的按钮所在的位置，带有"with Animation"

    
    @EnvironmentObject var appState: AppState
    
    var body: some View {
        
        ZStack {
            VStack {
                Spacer()
                Text("Tic Tac Toe")
                    .font(.title)
                    .fontWeight(.bold)
                    .foregroundColor(.indigo)
                    
                Image("MainLogo")
                    .resizable()
                    .frame(width: 150, height: 150)
                Spacer()
                Button("Start") {
                    withAnimation {
                        appState.isGameActive.toggle()
                    }
                }
                .padding()
                .padding(.horizontal, 16.0)
                .background(.indigo)
                .foregroundColor(Color.white)
                .containerShape(RoundedRectangle(cornerRadius: 16))
            .font(.headline)
                Spacer()
            }
        }
        
        
    }
}