title: How to make ScrollView width = to device screen width?
body: <p>I am making an app that has a (child) View inside a Scroll View. I understand I have to explicitly set the child View's width since the Scroll View won't provide that information to the child, but how can I make this child View's width auto-adjust based on the width of the device?</p>
  
  <p>For example, in the below I've set the width to 380 which centers the "Quotes" in iPhone 6, but makes them slightly right of center in iPhone 5.</p>
  
  <p><img src="https://i.imgur.com/WrpL99u.png" alt="screenshot"></p>