I edited a project of Xcode 10 with Xcode 11, which caused it to no longer run with Xcode 10, and the storyboard file could not be opened, showing an error: "This version does not support iOS 13.0 system colors. Open this document with least Xcode 11.0."
Is there a solution?
You could try (did not test) :
- select the project (at bthe very top of file list in XCode left pane)
- in the inspector panel, select the first icon (identity and type)
- see which XCode version is selected and select 10
Otherwise, hope you have a saved version of the older project.
Did you try openningt the storyboard as a text or html file and see what could be wrong there (may be you can post the html version hre for inspection if not too large).
