Question

以下代码不起作用：

var fs = new FormattedString();

fs.Spans.Add(new Span { Text = "\n\n" });

var telSpan = new Span { Text = "Hi Mum!" };

telSpan.GestureRecognizers.Add(new TapGestureRecognizer
{
   Command = new Command(() =>
   {
      // ...
   })
});

fs.Spans.Add(telSpan);

如果我将 TapGestureRecognizer 放在父级 Label 上，则可以正常启动。

我在XAML中声明了在其他地方带有 GestureRecognizer 的Span，并且工作正常。

这有什么问题吗？

Answer 1

向标签中的每个跨度添加 TapGestureRecognizers。在本例中，我将 Label 添加到 StackLayout。

var fs = new FormattedString();
foreach(var sentence in paragraph) 
{
     var span = new Span
     {
          Text = sentence.Message,
          TextColor = Color.FromHex("#222"),
          FontSize = 16,
     };
                
     span.GestureRecognizers.Add(new TapGestureRecognizer
     {
          Command = new Command(i =>
          {
               // On double tap the sentence Id will be written to the console.
               Console.WriteLine(i);
          }),
          CommandParameter = sentence.Id,
          NumberOfTapsRequired = 2 // removing this line will default number of taps to 1 
     });

     fs.Spans.Add(span);
}
// remove LineBreakMode = LineBreakMode.WordWrap if unnecessary.
someStackLayout.Children.Add(new Label { LineBreakMode = LineBreakMode.WordWrap, FormattedText = fs });

单击时，Span上的GestureRecognizer不会触发

1 个答案: