插入删除视图时的Swiftui动态过渡

I have a use case with a vertical menu with items: link_target1, ..., link_target5.
And I have a container that display a View associated with one of those items.
When I click on one of the menu items, I set a state and display the matching view according to this state.
What i'm trying to achieve, is a dynamic sliding effect on views transition:
If I go from target3 to target1 for example, i'm moving upward. So both views should slide to the bottom.
target3 view disappears by sliding down and target1 view appears by sliding down also.
So it's like all views are vertically stacked and by clicking to the menu I slide from one to another.
I need to be able to control, at the same time, the transition of the discarded and presented view and I'm only able to do that when the user actually click on the menu (cause otherwise, I don't know if we are going up or down).

代码如下所示:

enum ViewScreen: String, CaseIterable, Identifiable {
    case target1
    case target2
    case target3
    case target4
    case target5
        
    var id: String { return self.rawValue }
    var index: Int { ViewScreen.allCases.firstIndex(of: self) ?? 0 }
}

struct ContentView: View {
    @State var target: ViewScreen = .target1 {
        willSet {
            self.previousTarget = target
        }
    }
    @State var previousTarget: ViewScreen = .target1
    var direction: AnyTransition {
        get {
            previousTarget.index <= target.index ? .move(edge: .top) : .move(edge: .bottom)
        }
    }
    
    var body: some View {
        HStack(alignment: .top) {
            SidebarView(target: $target) // It just set target to the clicked link           
            Group {
                switch target {
                    case .target1: View1()
                    case .target2: View2()
                    case .target3: View3()
                    case .target4: View4()
                    case .target5: View5()
                }
            }.transition(AnyTransition.opacity.combined(with: direction))
        }
    }
}

有没有可能进行过渡？欢迎任何帮助.谢谢你们！