iOS Development--Error summary & common errors and warnings in development summary (38)

Summary of common errors and warnings in development (38)

Duplicate symbol

Error:

Ld:duplicate symbol _objc_class_$_************ in ****************

The first: the possibility is a class with the same name in the different group of your project

Workaround: Delete one or change the name.

The second type: suck:

You could also get this error if your mistakenly let XCode's auto-complete for #import statements specify the '. m ' File for The ' duplicate ' class instead of the '. h '.

Xcode Auto-complete feature, when you import the header file, the ". H" to the ". M"

Workaround: change to. h

iOS Development--Error summary & common errors and warnings in development summary (38)