title: Swift 2.0 Call Can Throw but is not marked with try
body: <p>I'm trying to update the code in my app after the update to XCode 7 and it looks like I'm going to have to go through a serious learning curve again just to catch up. What am I doing wrong in the code below?</p>
  
  <p>Is if let still being used?  </p>
  
  <p><a href="https://i.stack.imgur.com/8p3FO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8p3FO.png" alt="enter image description here"></a></p>
  
  <p>I am so not familiar with try/catch outside of C#. I don't know how to use it in the context of swift and it'd be great to find an easy to understand guide that doesn't assume that I ever knew Objective C or have ever come across this before.</p>