SwiftUI × Presentation

ナビゲーション&プレゼンテーション

//
//  ContentView.swift
//  NaviGomi
//
//  Created by crea on 2019/09/09.
//  Copyright © 2019 crea. All rights reserved.
//

import SwiftUI

struct ContentView: View {
    
    @State var openSheet: Bool {
        didSet {
            print("opensheet！\(openSheet)")
        }
    }
    @State var openAlert:       Bool
    @State var openActionSheet: Bool
    
    var body: some View {
        VStack(spacing: 8) {
            Button("Sheet") { self.openSheet.toggle() }
                .sheet(isPresented: $openSheet) {
                    Text("Sheet!!!")
                }
            Button("Alert") { self.openAlert.toggle() }
                .alert(isPresented: $openAlert) {
                    Alert(title: .init("このアカウント消したい?"),
                          message: .init("それは取り消せないけど..."),
                          primaryButton: Alert.Button.cancel(.init("やっぱやめた...")),
                          secondaryButton: Alert.Button.destructive(.init("けす！")))
                }
            Button("ActionSheet") { self.openActionSheet.toggle() }
                .actionSheet(isPresented: $openActionSheet) {
                    ActionSheet(
                        title: .init("beef or chicken?"),
                        buttons: [
                            .default(.init("Beef"))    { print("beef!") },
                            .default(.init("Chicken")) { print("chicken!") },
                            .cancel()
                        ]
                    )
                }
        }
    }
}

struct DestinationView: View {
    var body: some View {
        Text("goal!")
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView(openSheet:       false,
                    openAlert:       false,
                    openActionSheet: false
        )
    }
}