look up here XCode Build – CopyPNGFile Error and No Such File or Directory .
I had same problem and this solution helps me.
If you receive either of these annoying errors when building your
xcode app, something has corrupted in your project bundle.
- Open your project in Xcode
- Click on your project
- Click on your project under Targets
- Hit the build phases tab
- Open “Copy Bundle Resources” near the bottom
- Look for any resources listed in red!