Q3: Code cannot be highlighted after Xcode Sourcekitservice crashed

The solution is known to most people, but it is not guaranteed that newcomers to the pit are not aware of it and are therefore recorded.

First open a Finder window, then the shortcut key Shift+command+g open the road input box, of course you can choose to "go to the folder" this way to open. The input path is then

/USER (that is, the user, you enter user will automatically become the Chinese character)/pmst (this is my user name). You have to fill in your own)/library (that is, the library)/developer/xcode/deriveddata/ Please note: The TAB key can be automatically completed, so you just lose the first few English characters and then press TAB to help you complete the auto-completion. The final complete path is as follows:

After entering this folder, delete the corresponding items, or too much trouble to delete all.

Because the repository is a hidden file, you cannot see it from the graphical interface. Below provides two MAC terminal small order entertainment under:

Defaults write Com.apple.finder appleshowallfiles-bool true to show All files

Defaults write Com.apple.finder appleshowallfiles-bool true to hide all files

Q3: Code cannot be highlighted after Xcode Sourcekitservice crashed