title: How to create the nice buttons on iOS?
body: <p>I am not sure if this is a total stupid question and that I just do not see it but I just get it.</p>
  
  <p>Apple has this nice shiny button used on several occasions, e.g. stop-watch</p>
  
  <p><img src="https://i.stack.imgur.com/81Y0k.jpg" alt="enter image description here"></p>
  
  <p>Now, how can you create those buttons ? In code and Interface Designer ?</p>
  
  <p>Or is it only possible by using images for the different button states ?</p>
  
  <p>Thanks.</p>