Xcode 8 hangs / unresponsive when opening storyboard

Question

I\'ve recently upgraded to Xcode 8 and updated my project to Swift 3. All worked fine for a little while. Storyboard loading has always been slow (even when still running Xcode

Answer 1

(Xcode 9.2) I had this happen right after I added a constraint to a stackview. No matter what I did, it didn't seem to fix it. I knew it had to be an auto-layout issue it couldn't resolve.

I ended up opening the Main.storyboard file in text editor and deleting the scene that was causing the issue. It will start with

and end with . Just highlight the entire chunk, delete, save, and try again.

Much better than starting over from scratch!