IOS: Compilation error undefined symbols for architecture i386: _objc_class_$_xxx ", referenced From:error

Undefined Symbols for architecture i386: _objc_class_$_XXX", referenced From:error



This means that you cannot find a name namedXXXclass, which in turn results in an error that cannot be connected, as long as it is resolved.

since there is no such class, we need to add this class

The first step:

Select project file to find targets

Step Two:
Select Build Phases

Step Three:
Select Compile Sources

Fourth Step:
Add the XXX.M Class (remember, add a. m file)

It may then cause a butterfly effect, and all the classes you reference to the XXX class will not be found, so add it.

IOS: Compilation error undefined symbols for architecture i386: _objc_class_$_xxx ", referenced From:error