"Unrecognizer selector sent to class" on class category after importing framework

Question

After adding MessageUI.framework to my Xcode (4.3.2) iOS project I get:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[Message responseArrayKey]: **unrecognized selector sent to class ..

for one of my class extensions.

Message class is simply NSManagedObject subclass and I have category NSManagedObject(Synchronize) on it:

     //
    //  Message.h
    #import <Foundation/Foundation.h>
    #import <CoreData/CoreData.h>

    #import "NSManagedObject+Synchronize.h"
    @class Message;



       @interface Message : NSManagedObject {
        @private
            }
        ...
    @end
    //
    //  NSManagedObject+Synchronize.h

    @interface NSManagedObject (Synchronize)
    +(NSString *)responseArrayKey;
    @end

To be clear: The code worked before and I have Linker flags set to: -Obj-C and -all_load. (Followed: http://developer.apple.com/library/mac/#qa/qa1490/_index.html)

Somehow thou - this framework breaks the linking. What is so special in this framework? I am using many more framework and none of them is causing the issue.

Lukasz Lukasz · Accepted Answer · 2012-06-30T08:37:52

I have repaired the issue by refactoring my Message class to CDMesage. Looks like there was class name clash with MessageUI framework.

"Unrecognizer selector sent to class" on class category after importing framework

1 Answers