Xcode 9 Storyboard: an internal error occurred. editing functionality may be limited
You can find the issue in Problem Report, just clink on report a bug and open the log.txt file where you can find the issue. In my case i set invalid table row height.
I was getting same issue in Xcode 10.2.1
I have open interface builder (Story board) as source code just like attached screen shot by right click on storyboard file
Followed below steps
- Updated version 3.0 to 3.5
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" - Open storyboard as interface builder again
Its get refreshed now and I was not getting error now and view was proper also
However when I revisted the spruce code of story board the version reverted to 3.0 again.
But this worked for as refresh and resolved my problem
Trash derived data by two ways either by command or Preferences.
rm -rf ~/Library/Developer/Xcode/DerivedData/
or
Xcode -> Preferences -> Location -> Derived Data
In Xcode menu go to product clear the project.
Disconnect connected device and restart Xcode and system.
More: https://www.e-learn.cn/content/wangluowenzhang/266937