如何将数据从Navigation.PopAsync传递到上一页？

1 回答

• 2

  我看了一个关于事件和代表的视频并让它运行起来！

  第1页：

  public partial class Page1 : ContentPage, INotifyPropertyChanged
  {
      public static int _player;
      public static int Player
      {
          get{ return _player; }
          set{ _player = value; }
      }
  
      public NewGameH(string homeTeam, string opponentTeam)
      {
          InitializeComponent();
      }
  
      public void OnPlayerSet(object source, EventArgs e)
      {
          System.Diagnostics.Debug.WriteLine("Begin Player {0} ", Player);
      }
  
      async void button1_Clicked(object sender, System.EventArgs e)
      {
          var page2 = new Page2();
          page2.PlayerSet += this.OnPlayerSet;
          await Navigation.PushAsync(page2);
      }
  }
  

  第2页：

  public partial class Page2 : ContentPage{
      public delegate void SetPlayerEventHandler(object source, EventArgs args);
      public event SetPlayerEventHandler PlayerSet;
  
      public Page2()
      {
          InitializeComponent();
      }
  
      protected virtual void OnPlayerSet(){
          if (PlayerSet != null){
              PlayerSet(this, EventArgs.Empty);
          }
      }
  
      async void button2_Clicked(object sender, System.EventArgs e)
      {
          Page1.Player=1;
          OnPlayerSet();
          await Navigation.PopAsync();
      }
  }
  

  回复于 2024-04-29T06:04:14+08:00