title: SelectedItem binding works in UWP but not in ios
body: <p>In my Xamarin.Forms app, I have a <code>ListView</code> and am binding to the <code>SelectedItem</code> property:</p>
  
  <pre><code>&lt;ListView x:Name="MyListView" ItemsSource="{Binding MyItems}" IsVisible="{Binding Expanded}" SelectedItem="{Binding SelectedItem, Mode=TwoWay}" SelectionMode="Single" SeparatorVisibility="None"&gt;
      &lt;!-- not relevant code --&gt;
  &lt;/ListView&gt;
  </code></pre>
  
  <p>When I run it on UWP, my <code>SelectedItem</code> property in my view model gets set when I select an item in the list. But not in ios. Am I doing something wrong? Or is there a work around?</p>