Xcode code sense and cmd+click to symbol doesn't work for 1 of my projects

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:

1. File > Workspace Settings
2. Click over the little grey arrow above Advanced... Button (Derived Data)
3. Select my project folder and delete it.

Now in your project see if cmd+click works

In my case I solved in this way.

• Go to Project's propreties from Project navigator.
• Build Phases
• Add your *.m files in "Compile Sources"

Now re-build.

This could be happen, for instance, when your manually rename a class after its creations.

Hope this help.