SwiftUI List的使用

演示创建一个三组，每组有四行数据的列表

import SwiftUI

struct ContentView: View {
    
    @State var showRight:Bool
    
    var body: some View {
        
        NavigationView{
            List {
                //创建分组
                ForEach (0 ..< 3) {(i) in
                    Section(header:Text("Section \(i)"), footer: Text("Fotter\(i)")){
                        //创建行内容
                        ForEach (0 ..< 4) {(i) in
                            return HStack {
                                Text("\(i)").listRowBackground(Color.red);
                            }
                        }
                    }
                }
                        
            }
            .onAppear {
                 //隐藏自带分割线
                 UITableView.appearance().separatorStyle = .none
            }
            .navigationBarTitle("Title")
            .navigationBarItems(trailing: Button(showRight ? "Right" : "trailing"){
                print("trailing button clicked!")
                self.showRight.toggle()
            })
        }
        
        
    }
}

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