Git ignore UserInterfaceState.xcuserstate
git rm --cached ProjectFolder.xcodeproj/project.xcworkspace/xcuserdata/myUserName.xcuserdatad/UserInterfaceState.xcuserstate git commit -m "Removed file that shouldn't be tracked"
git rm --cached ProjectFolder.xcodeproj/project.xcworkspace/xcuserdata/myUserName.xcuserdatad/UserInterfaceState.xcuserstate git commit -m "Removed file that shouldn't be tracked"