title: UICollectionView is too wide. How can i make it the width of the device?
body: <p>I created a new UICollectionView in the storyboard. My problem is that the cells try and fit a larger width than the width of the device, so the ones on the right get cut off. What's a good way to fix this?</p>
  
  <p><img src="https://i.stack.imgur.com/iJokM.png" alt="enter image description here"></p>