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

Here is what I did , cut the troubling viewcontroller, paste it in a new temp project's storyboard then paste back the viewcontroller. Working fine for me.

Over the time, as the storyboard grows, xcode makes a mess of keeping the history track of viewcontroller's elements and hence the freeze.