cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   Cyber
   Member

   Hello,

   In my game I use Layers. I have one for my player, and one for the controls. How can I communicate variables between them? I have 3 vars that need to be able to be changed in both layers. How can I do that?

   Posted 2 years ago #
2. 

   randomtruth
   Member

   You will need to read about messaging and selectors. This link should be increadibly helpful and should be able to answer all your objective C related questions...
   http://developer.apple.com/iphone/library/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtHowMessagingWorks.html#//apple_ref/doc/uid/TP40008048-CH104-SW1
   Hope this helps.

   Posted 2 years ago #
3. 

   Codemattic
   Moderator

   http://www.cocos2d-iphone.org/forum/topic/630
   http://www.cocos2d-iphone.org/forum/topic/2520
   http://www.cocos2d-iphone.org/forum/topic/1222

   Posted 2 years ago #
4. 

   Cyber
   Member

   @Codemattic
   Thank you!
   Can someone help me with explaining the second post in this topic? http://www.cocos2d-iphone.org/forum/topic/1222
   I have
   GameTankLayer *GTLayer;
   in my .h file, and then I have:
   [GTLayer setTankRotation:5];`
   in my .m file. It doesn't give errors, but the action isn't executed either. What am I missing?

   Posted 2 years ago #
5. 

   Codemattic
   Moderator

   you have to set GameTankLayer to point to a GTLayer that youve already created before you can send it messages. Right now GameTankLayer is nil, and it will ignore messages.

   Posted 2 years ago #
6. 

   Cyber
   Member

   Okay, thank you. How can I do that? Sorry for all my questions, but I am a big n00b in objC.

   btw, I just noticed the typo in the title. It of course should be 'communication between two layers'.

   Posted 2 years ago #
7. 

   Codemattic
   Moderator

   [typo fixed]

   create your new GTLayer and save it in a variable, lets call it myGTLayer.
   create your other object, lets call it myObject.
   then: [myObject setGameTankLayer:myGTLayer];

   Posted 2 years ago #

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