I upgraded from Xcode 7.3 to Xcode 8.0 and changed syntax from swift 2.3 to swift 3.0. I am able to build the project and run fine but I got some 233 warnings all about images I used in Assets.xcassets.
I realized that the path is wrong as I changed the name of my project from projectA to projectB and the path is referring to an invalid path which is
/Users/name/Desktop/projectA/projectB/Assets.xcassets/Images/img_01.imageset/img_01@2x.png is missing from working copy
I believe that I have to remove name of those files from my sourcecontrol as they are not valid anymore. I have committed all my changes and have no idea how to remove these missing file links to get rid of those warnings.
I was able to solve this after a lot of research.
I went to projectB.xcodeproject > Show package contents > project.pbxproj > xcuserdata. Delete the xcuserdata.
Then go to Source Control > Commit
Commit all changes. Since the path doesn't exist, Xcode will not commit changes; so just cancel out of it and do
Source Control > Refresh Status
Then exit out of Xcode and restart it.