CODEWITHSUNDEEP
c++objective-ccocos2d-iphoneobjective-c++
S.H.
S.H.

Reputation: 2853

objective-c why a .mm file is considered a int* type?

I am trying to create a weak reference of a .mm class... the problem is the file even though code-wise its a NSObject class it considers it as a int* type. If I change the file back to .m though it accepts it as a Obj-c class but the code stops working because of cocos2d requirement of files being .mm

//Game Logic is actually NSObject meaning obj-c class.
@interface GameLogic : NSObject 


//However here I get the error like the file is type int*
@property (weak,nonatomic)GameLogic * __weak gameLogicWeak;

Those are the 2 msgs I get.

Property with 'weak' attribute must be of object type

'__weak' only applies to Objective-C object or block pointer types; type here is 'int *'

Anyone has any idea what can I do to overcome this problem? I know there exists many solutions, one of them would be just not create that weak link, use delegate, or well many other possible solutions.

But this solution was a cleaner one that I came up with which makes ARC come in handy with the memory clean up.

Any suggestions? Workarounds? Solutions? anyone has come with this problem?

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I get the following message when @class GameLogic is added in .h and #import in the .m respectively. This message is generated in a location where I am using the weak reference.

Receiver type 'GameLogic' for instance message is a forward declaration

Upvotes: 1

Views: 465

Answers (1)

CodeSmile
CodeSmile

Reputation: 64477

Did you do

#import "GameLogic.h"

in the header where you added the property? You can also add

@class GameLogic;

but not

class GameLogic;

because that would make it a forward reference to a C++ class. Also double-check that you don't actually have a C++ class of the same name.

And is that header file's implementation also .mm? Because it has to be if GameLogic allows direct access (property or return value) to a C++ class.

Upvotes: 1

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