Undefined Symbols for Architecture i386 error

Ext.: http://blog.csdn.net/azhou_hui/article/details/18312047

When multiple people work together on the same project or copy a project, there are often problems like this:

Undefined Symbols for Architecture i386:

"_objc_class_$_xx file name", referenced from:

The following are the causes and modifications that may cause such problems:

1. Related project files not imported

You can directly in here + come in, you can also in the left engineering directory to all re-guide the document (in the case of multi-person operation of the project, the general approach)

2..framework File not imported

Put xx file library + come in, this question "_objc_class_$_asidentifiermanager", is because Adsupport.framework class library does not add

3. File path missing

Check if some file paths are not joined or are incorrectly written

Project Compile report: Undefined Symbols for Architecture i386: and "_objc_class_$_xx", referenced from: error, the problem is largely due to the above situation, the various aspects of the basic check is OK.

Undefined Symbols for Architecture i386 error