broken-tap-areas.swift

import SwiftUI

struct ContentView: View {
    @State private var showSheetView = false

    var body: some View {
        VStack(spacing: 0) {
            topBar
            Color.blue
        }
        .sheet(isPresented: $showSheetView) {
            SheetView()
        }
    }

    private var topBar: some View {
        HStack(spacing: 0) {
            Spacer()
            Button {
                showSheetView = true
            } label: {
                Text("Sheet")
                    .padding()
                    .background(Color.red)
            }
        }
    }
}

struct SheetView: View {
    var body: some View {
        Color.green
    }
}

struct ContentView_Previews: PreviewProvider  {
    static var previews: some View {
        ContentView()
    }
}

• Tap "Sheet"
• Background the app for a few seconds
• Open the app again
• Dismiss sheet
• Notice how the tap area for the Button is shifted down