title: How to auto layout between iPhone 4 and 5
body: <p>I have an iPhone app that will only ever be in Portrait view. </p>
  
  <p>I have a number of buttons etc. on my layout. However, when I switch between iPhone 4 and iPhone 5 sizes, I need the bottom image to "stick" to the bottom. The rest of the images and buttons can stay where they are. I just need to bottom white image to look like a footer.</p>
  
  <p>Can anyone please tell me how to do this?</p>
  
  <p>I have tried using constraint (Pin) and set the bottom margin value to 0 but this simply stretched the bottom white image across the entire View. </p>
  
  <p>Below are 2 screen grabs of how the layouts appear for both iPhone 4 and 5 (this is taken in Storyboard)
  iPhone 4</p>
  
  <p><img src="https://i.stack.imgur.com/BEh3L.png" alt="enter image description here"></p>
  
  <p>And iPhone 5</p>
  
  <p><img src="https://i.stack.imgur.com/ABTON.png" alt="enter image description here"></p>