CODEWITHSUNDEEP
xamarin.formsgestures
Jesse Liberty
Jesse Liberty

Reputation: 1414

Xamarin.Forms Tap Gesturer not responding

In my XAML I have:

<Label Text="{Binding DisplayName}" TextColor="Blue">
   <Label.GestureRecognizers>
      <TapGestureRecognizer Command="{Binding TapCommand}"
                            CommandParameter="{Binding URL}" />
   </Label.GestureRecognizers>
</Label>

In the view model (and I've checked the binding context) I have

private ICommand tapCommand;
public ICommand TapCommand
{
    get { return tapCommand; }
}

public LinkReportPageViewModel()
{
    PopulateLinkReport();
    tapCommand = new Command( OnTapped );
}

public void OnTapped( object tappedURL )
{
    Log.LogThis( $"Tapped on {tappedURL}", "LinkReportPageVM", DateTime.Now );
}

I expect that when I tap on the label I'll hit a breakpoint in OnTapped, but I don't. Am I missing something?

Note, this label is in a grouped list.

This was based on https://developer.xamarin.com/guides/xamarin-forms/application-fundamentals/gestures/tap/

Thanks!!

Upvotes: 1

Views: 473

Answers (1)

Steve Chadbourne
Steve Chadbourne

Reputation: 6953

As Diego mentioned, the binding context for the label is the model of the data item that the ListView is bound to. Try changing it to this:

<Label Text="{Binding DisplayName}" TextColor="Blue">
   <Label.GestureRecognizers>
      <TapGestureRecognizer Command="{Binding Path=BindingContext.TapCommand, Source={x:Reference NameOfListView}}"
                            CommandParameter="{Binding URL}" />
   </Label.GestureRecognizers>
</Label>

Also ensure that you give your ListView an x:Name

We are telling the command that it's binding context is the parent ListView, which is bound to the ViewModel containing your command.

Upvotes: 2

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