SwiftUI 3.0 Button的使用 相当于UIButton控件

//
//  ContentView.swift
//  ButtonControl
//
//  Created by lujun on 2021/12/19.
//

import SwiftUI

struct ContentView: View {
    var body: some View {
//         basiceButton
        //ScrollView(.vertical, showsIndicators: true) {
//            addToContainers
//        styleButtonIOS
        customButtonStyle
        //}
    }
    
    //MARK: - button的基本使用
    var basiceButton : some View {
        VStack(spacing:20) {
            HStack {
                Button(action: {
                    singIn()
                } ,label: {
                    Text("Sign In 1")
                })
                Button(action: singIn) {
                    Text("Sign In 2")
                }
             }
            HStack {
                Button("Register 1")
                {
                    register()
                }
                Button("Register 1",action: register)
            }
        }
    }
    private func singIn(){
        debugPrint("singIn")
    }
    private func register(){
        debugPrint("register")
    }
    
    //MARK: - 添加容器
    var addToContainers: some View {
        List {
            ForEach(items) { item in
                Text(item.title) + Text("\t\(item.desc)")
            }
            Button("Add Item",action: addItem)
        }
    }
    struct Item: Identifiable {
        let id = UUID()
        let title: String
        let desc: String
    }
    @State private var items: [Item] = []
    private func addItem() -> Void {
        let newItem = Item(title: "new items title", desc: "new Item Desc")
        items.append(newItem)
    }
    
    //MARK: - styleButtonIOS button自带的样式
    var styleButtonIOS: some View {
        VStack(spacing: 20) {
            Button("Sign In",action: singIn)
                .buttonStyle(PlainButtonStyle())
            Button("Sign In",action: singIn)
                .buttonStyle(BorderlessButtonStyle())
            Button("Sign In",action: singIn)
                .buttonStyle(DefaultButtonStyle())
            #if os(macOS)
            Button("Sign In",action: singIn).buttonStyle(.bordered)
            Button("Sign In",action: singIn).buttonStyle(BorderlessButtonStyle())
            #endif
            
        }
    }
     
    var customButtonStyle: some View {
        VStack(spacing: 20) {
            Button("Scale Effect",action: singIn)
                .buttonStyle(ScaleEffectButtonStyle())
            Button("Red Bordered",action: singIn)
                .buttonStyle(RedBorderedButtonStyle())
            Button("Scale Effect + Bordered",action: singIn)
                .buttonStyle(RedBorderedButtonStyle())
                .buttonStyle(ScaleEffectButtonStyle())
            Button("Scale Effect + Bordered",action: singIn)
                .buttonStyle(ScaleEffectButtonStyle())
                .buttonStyle(RedBorderedButtonStyle())
            Button("Long Press Tap",action: singIn)
                .buttonStyle(LongPressButtonStyle())
            Button("ComposeButtonStyle",action: singIn)
                .buttonStyle(ComposeButtonStyle())
        }
    }
    
    struct ScaleEffectButtonStyle : ButtonStyle {
        func makeBody(configuration: Configuration) -> some View {
            HStack {
                Spacer()
                configuration.label
                    .padding()
                    .foregroundColor(configuration.isPressed ? .red: .white)
                Spacer()
            }
            .frame(width: 300)
            .background(Color.blue.cornerRadius(10.0))
            .scaleEffect(configuration.isPressed ? 0.9 : 1.0)
        }
    }

    struct RedBorderedButtonStyle : PrimitiveButtonStyle {
        func makeBody(configuration: Configuration) -> some View {
            Button(configuration)
                .border(Color.red,width: 2)
        }
    }
    
    struct LongPressButtonStyle: PrimitiveButtonStyle {
        func makeBody(configuration: Configuration) -> some View {
             Button(configuration)
                .gesture(
                 LongPressGesture()
                    .onEnded({ _ in
                        configuration.trigger()
                    })
                )
        }
    }
    
    struct ComposeButtonStyle: PrimitiveButtonStyle {
        func makeBody(configuration: Configuration) -> some View {
            Button(configuration)
                .buttonStyle(LongPressButtonStyle())
                .buttonStyle(RedBorderedButtonStyle())
                .buttonStyle(ScaleEffectButtonStyle())
        }
    }
    
}

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