title: iOS - Can AutoLayout make constraint like view0.height = view1.height + view2.height?
body: <p>I want make a constraint like <code>view0.height = view1.height + view2.height</code>. And when <code>view1.height</code> or <code>view2.height</code> changed, <code>view0.height</code> will auto changed.</p>
  
  <p>It's passible in iOS AutoLayout?</p>