How to make ZStack as top index even on the modal sheet in SwiftUI?

问题

While I'm trying to make incoming call view with ZStack, I saw that It looks under modal sheet presented View.

• Can I make this incoming call view top even above modal view?
• Or How Can I dissmiss all modal sheet presentations at a time when a call arrived?

AppView.swift

import SwiftUI

struct AppView: View {

    @ObservedObject var callVM = CallViewModel()
    
    var body: some View {
        ZStack {
            TabView {
                TabOne()
                    .tabItem {
                        Image(systemName: "list.dash")
                        Text("Menu")
                    }
                TabTwo()
                    .tabItem {
                        Image(systemName: "square.and.pencil")
                        Text("Order")
                    }
            }
            if self.callVM.isIncomingCallActive {
                CallView(isActiveCall: self.$callVM.isIncomingCallActive)
            }
        }
        .onAppear() {
            print("AppView onAppear called.")
            self.callVM.getCall()
        }
    }
}

struct AppView_Previews: PreviewProvider {
    static var previews: some View {
        AppView()
    }
}

来源：https://stackoverflow.com/questions/63707549/how-to-make-zstack-as-top-index-even-on-the-modal-sheet-in-swiftui