title: Xamarin Forms Tap gesture recognizer Ios doesn't work
body: <p>I have a problem about some Gesture Recognizer into my <code>Xamarin</code> Forms project.
  I was working to set three Image into a grid layer to see a viewfinder with <code>Zxing</code> Forms library to go into specific page and manage the flash camera device.</p>
  
  <p>After I compiled and build my project, into Android device works perfectly, besided Ios that when I touch an image of them they didn't work not at all. I don't make any mistake to write the code.</p>
  
  <p>Tap recognizer for example are wrote like these:</p>
  
  <pre><code>var settingsGestureRecognizer = new TapGestureRecognizer();
  settingsGestureRecognizer.NumberOfTapsRequired = 1;
  settingsGestureRecognizer.Tapped += async(s, e) =&gt;
      {
          // handle the tap
          NavigationPage nav = new NavigationPage(new SettingsPage());
          await Navigation.PushModalAsync(nav);
      };
  </code></pre>
  
  <p>And also, I add it into a button of a <code>StackLayout</code> like these</p>
  
  <pre><code>settingsImage = new Image
      {
          Source = ImageSource.FromFile(ConstantStringCollector.iconSettings),
          Aspect = Aspect.AspectFit,
          WidthRequest = 45,
          HeightRequest = 45,
          MinimumHeightRequest = 45,
          MinimumWidthRequest = 45,
          IsEnabled = true
      };
  settingsImage.GestureRecognizers.Add(settingsGestureRecognizer);
  </code></pre>
  
  <p>And then there is my personal layout</p>
  
  <pre><code>StackLayout stackLayoutBottom = new StackLayout
  {
      IsEnabled = true,
      IsVisible = true,
      IsClippedToBounds = true,
      Padding = new Thickness(20, 20),
      BackgroundColor = Color.Black,
      Opacity = 0.8,
      VerticalOptions = LayoutOptions.FillAndExpand,
      Orientation = StackOrientation.Horizontal,
      Children = {
                  infoImage,
                  flashImage,
                  settingsImage
                  }
  
  };
  </code></pre>
  
  <p>Someone could help me?</p>