ActionSheetIfAvailable ViewModifier

ContentView.swift

//
//  ContentView.swift
//  StackOverflow
//
//  Created by Németh Gergely on 2020. 01. 08..
//  Copyright © 2020. Németh Gergely. All rights reserved.
//

import SwiftUI

struct iosBackground: ViewModifier {
    #if os(OSX)
    func body(content: Content) -> some View {
        content
    }
    #else
    func body(content: Content) -> some View {
        content.background(Color.blue)
    }
    #endif
}

struct ActionSheetIfAvailable: ViewModifier {
    let isPresented: Binding<Bool>
    let actionSheet: () -> ActionSheet

    func body(content: Content) -> some View {
        #if os(OSX)
        return content
        #else
        return content
            .actionSheet(isPresented: isPresented, content: actionSheet)
        #endif
    }
}

extension View {
    func actionSheetIfAvailable(isPresented: Binding<Bool>, content: @escaping () -> ActionSheet) -> some View {
        modifier(ActionSheetIfAvailable(isPresented: isPresented, actionSheet: content))
    }
}

struct DemoView: View {
    @State var showActionSheet = true
    var body: some View {
        Text("Hello, demo!").padding()
            .modifier(iosBackground())
            .actionSheetIfAvailable(isPresented: $showActionSheet) {
                ActionSheet(
                    title: Text("Actions"),
                    message: Text("Available actions"),
                    buttons: [
                        .cancel { },
                        .default(Text("Action")),
                        .destructive(Text("Delete"))
                    ]
                )
            }

    }
}

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