From @sebawita on May 12, 2017 15:22

When I use <Switch> with NS 3.0, the component doesn't get rendered on iOS (it does work fine on Android though), however there seems to be an empty space where the UI component should be.

  <Switch
    [(ngModel)]="profile.angularPro">
  </Switch>

However when I use horizontalAlignment="left" the component appears just fine.

  <Switch
    [(ngModel)]="profile.angularPro"
    class="switch"
    horizontalAlignment="left">
  </Switch>

Copied from original issue: NativeScript/ios-jsc#764