Xcode project CMD-Click on symbol to 'Jump to Definition' does not work
Try this:
Open the organizer. Close your project in Xcode (leaving Xcode and the organizer running). In the organizer, in projects, click on the Delete button next to Derived Data. Quit Xcode.
Find your Xcode project via the finder. Rightclick and "Show Package Contents". Delete project.xcworkspace and xcuserdata folder.
Open up Xcode again and see if that works for you.
With Xcode 8.2 I solved in this way:
- File > Workspace Settings
- Click over the little grey arrow above Advanced... Button (Derived Data)
- Select my project folder and delete it.
Now in your project see if cmd+click works
Similar issues with Xcode 8 and Swift 3.
Just quitting the Xcode and Simulator, reopening the project worked.
Other times, Restarting the Mac gets rid of question mark and does navigate to relevant method implementations
And at times, simply closing the project and opening it again from 'File -> Open Recent' also works.