title: How to fit all numbers on my display label? - Basic Calculator
body: <p>I'm a beginner in Swift and Xcode. As my very first project without tutorials I try to do basic Calculator app. My goal is to make it look like original calculator app on iOS 9. Everything works, but I don't know how to fit all numbers on the screen. In Apple app, if there are more numbers, they're getting smaller. How to do that? </p>
  
  <p><img src="https://i.stack.imgur.com/OPC46.png" alt="Here&#39;s how it looks"></p>