Xcode 8.1 storyboard showing blue lines only

Question

I installed Xcode 8.1 and the storyboard shows only blue lines, for all UI elements. If someone has figured it out let me know. I am unable to revert it to even Xcode 8.0.

Answer 1

Had a similar issue (only blue lines without details rendering) when upgrading Xcode without restarting the Mac. Killing the simulator fixed it:

sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService

Answer 2

I had a similar problem in XCode 11, in my case even the view controllers was completely black. The problem was a Custom Class assigned to an UIButton. After a while i deleted the class because i didn't need it anymore, but the Button still had the class assigned.

Open the particular storyboard file, delete the assignment in Identity Inspector, restart Xcode. This fixed it for me.

Answer 3

Don't worry revert back to old xcode

To remove the blue lines,

First, select a view controller in the storyboard.

Then, go to Editor > Canvas > Show Bounds Rectangles

This will hide the blue lines.

You may have to repeat this 2 or 3 times to make it work.

Answer 4

I had this same issue when I had upgraded to Mojave and then installed an older Xcode (10.1) version. To fix I deleted all Xcode (10.2/10.1) versions and then installed Xcode 10 and it fixed the issue.

Answer 5

Ok, So finally I too got the blue line problem in Xcode 8.1

Here is the screenshot

We can see the error message:

An internal error occurred. Editing functionality may be limited

with a Report a Bug button on the right side.

Don't know why it happened. But I just quit Xcode and Simulator and restarted it. That fixed it and I got the UI elements back.

Answer 6

Seeing the blue rectangles is actually a feature of Xcode editor. You can turn this On/Off by going to Editor menu->Canvas->Show Bounds Rectangles

But yes, seeing just the blue boxes seems to be a bug. Usually happens if you have been switching between various versions of Xcode frequently. I guess quitting and reopening Xcode shall resolve this temporary issue.