title: iOS Swift 3 tableview custom cell error
body: <p>I am trying to add a custom cell to tableview in Swift3 but getting a strange error. Here is the screenshot of error. </p>
  
  <p><a href="https://i.stack.imgur.com/8FPDU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8FPDU.png" alt="enter image description here"></a></p>