title: How to auto layout an app for different devices.
body: <p>Apologies in advance for the basic nature of this question. I'm happy to be redirected to a previously answered version of this question, but haven't found it yet.</p>
  
  <p>I just finished up the majority of my first app, and am concerned I might have set it up in the wrong way. </p>
  
  <p>My app looks "good" on an iphone7, but when I change the device to a 7+ there is empty space on the bottom and right edges of the view controllers, and when I run it on an iphone 5, the view doesn't fit. </p>
  
  <p>Is there a way to make the view of my app automatically stretch/condense to any device? Or, is this way more complicated that I anticipated? I want to believe there's an easy solution but I haven't found it yet.</p>
  
  <p>Thanks!</p>