xcode not recognizing NSPopUpButton as a class

Question

I'm trying to implement an NSPopUpButton but Xcode does not recognize it. After I type NSPopUpButton Xcode does not offer code completion and reports the problem "use of undeclared identifier". Is there a specific framework I have to add and if so which one. Sorry I know there is probably a simple fix...

Thanks

Answer 1

That's because NSPopUpButton inherits from NSButton which is declared in the AppKit framework for OS X, and you can not use an OS X class in an iOS project.

(Basing this off the use of the iOS tag in the question)

If this is a Mac project, then you should check to make sure that your class is importing the AppKit framework, or Cocoa/Cocoa.h which also imports AppKit.