title: How do you balance Auto Layout with creating frames?
body: <p>When I'm creating a frame in iOS with <code>CGRectMake()</code>, be it setting the <code>frame</code> property or using <code>initWithFrame:</code>, it asks for the x, y, width and height. I supply these.</p>
  
  <p>But with Auto Layout, I'm next going to say something like: "position its x in the very middle" and "set the width to half the screen", right after I set those with <code>CGRectMake()</code> likely differently.</p>
  
  <p>What do I set them as in <code>CGRectMake()</code>? 0? An arbitrary value? Something close to what I want?</p>