Objective-c - Copied xib includes cannot be generated

Question

I copied a xib (including the corresponding class) from one project to another project, but it crashed when running, saying that the unpacking was empty. But the original project is exactly the same as the newly moved project, so why does it crash? ! ! ! !

Answer 1

What is returned is an optional value. You can go to xib to see its identify or see if it has been imported

Answer 2

Please post the initialization code of nib
Your nib is completely empty