“Could not find any information for class named ViewController”

Question

This bug has been driving me nuts since I started using Xcode (4.6.3). Whenever I try to link a Storyboard item to my code, I get the error:

Could not

Answer 1

I just had this problem on April 2017 with Xcode 8

Simply creating an outlet through code and compiling fixed it. eg:

@IBOutlet weak var containerViewHeight: NSLayoutConstraint!

You got to love Xcode…

Edit: Still happening on Xcode 9