如何使用tapGesture（Xamarin.Forms）从应用程序中的多个标签中删除选定的标签

Question

我有一个按钮，每次单击它时都会创建一个标签，假设我点击了它10次，所以现在我创建了10个标签。如何删除我点击的随机标签？

PS: my labels are added to a stackLayout 

我的应用程序的想法是创建待办事项列表。我有一个输入框和一个按钮。我在输入框中键入我想要做的事情，然后点击按钮，并在条目中输入一个标签。当我完成某件事情时，我想要点击某个特定标签并将其删除，这怎么可能。任何帮助？

代码：

var entry = new Entry(); 
entry.Placeholder = "type here"; 
entry.BackgroundColor = Color.White; 
entry.PlaceholderColor = Color.Gray; 
var newButton = new Button { Text = "+", BackgroundColor = Color.Purple, FontSize = Device.GetNamedSize(NamedSize.Small, typeof(Button)), }; 
StackLayout stackLayout = new StackLayout(); 
stackLayout.Children.Add(entry); 
stackLayout.Children.Add(newButton); 
this.Content = stackLayout; 

var tapGestureRecognizer = new TapGestureRecognizer(); 
tapGestureRecognizer.Tapped += labelClick; 
newButton.Clicked += (sender, args) => { label = new Label(); 
label.BackgroundColor = Color.White; 
label.TextColor = Color.Black; 
label.Text = entry.Text; 
entry.Text = ""; 
stackLayout.Children.Add(label); 
label.GestureRecognizers.Add(tapGestureRecognizer);  

Answer 1

好了，我不知道你的代码是如何，这让人有点难以回答你的问题，但这里有一个想法：

如果您使用的是MVVM方法（我推荐），你可以用这个标签创建一个视图，用待处理的项目数据（Id，Name，Details，...）将它绑定到ViewModel，添加TapGesture并在ViewModel中执行操作。

编辑：

不这样做或我会做到这一点的最好办法。但这里是一个基于你的来源的解决方案：

public MainPage() 
    { 
     var entry = new Entry(); 
     entry.Placeholder = "type here"; 
     entry.BackgroundColor = Color.White; 
     entry.PlaceholderColor = Color.Gray; 
     var newButton = new Button { Text = "+", BackgroundColor = Color.Purple, FontSize = Device.GetNamedSize(NamedSize.Small, typeof(Button)), }; 
     StackLayout stackLayout = new StackLayout(); 
     stackLayout.Children.Add(entry); 
     stackLayout.Children.Add(newButton); 
     this.Content = stackLayout; 

     newButton.Clicked += (sender, args) => 
     { 
      var label = new Label(); 
      label.BackgroundColor = Color.White; 
      label.TextColor = Color.Black; 
      label.Text = entry.Text; 
      entry.Text = ""; 
      stackLayout.Children.Add(label); 

      var tapGestureRecognizer = new TapGestureRecognizer(); 
      tapGestureRecognizer.Tapped += (sensder, e) => DeleteLabel(stackLayout, label); 

      label.GestureRecognizers.Add(tapGestureRecognizer); 
     }; 
    } 

    void DeleteLabel(StackLayout stackLayout, Label label) 
    { 
     stackLayout.Children.Remove(label); 
    }