In Chapter 31, after updating ViewControl for Swift 4.1 and Xcode 9.4.1, I get a runtime error, which reads in part:
Unable to install constraint on view. Does the constraint reference something from outside the subtree of the view? That’s illegal.
No window appears. At the end of Chapter 30, ViewControl was working fine, so the problem must be in the NerdTabViewController file.
Has anyone encountered this? If so, have you found a way around it (in modern code)?