Today, I have a trouble error. When I click Reload All class in Interface Builder, my xib is not loaded resource. But it's working.
r-click on xib > Get Info and then you will see Info dialog. Please choose your Path again. It will work smooth again.
If it’s not working, remove your xib from your project. Copy your xib from your project and paste in other place. Delete your xib in your project folder. Add your xib from xcode, it will work again.
I take a long time for searching solution and I can’t find in goolging too :(