cocos2d for iPhone

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

1. 

   friken
   Member

   I'm not understanding something about how to use transitions. I've looked through the transitions demo and my code looks correct from what I can tell. Seems like I am missing something simple?

   my code:
   
RotoZoomTransition *t = [RotoZoomTransition node];
[[Director sharedDirector] replaceScene:[t transitionWithDuration:1.2f scene:pl]];

   I get a warning "RotoZoomTransition: may not respond to '-transitionWithDuration:' and the app crashes when hitting that line. I have looked at trasitions.h and RotoZoomTransition is of type TransitionScene which clearly has a transitionWithDuration:scene:

   ideas?

   Posted 2 years ago #
2. 

   digitalhobbit
   Member

   transitionWithDuration:scene is a class method on the Transition class. Simply call this on the class, rather than first getting a node and calling it on that. E.g.:

   [[Director sharedDirector] replaceScene:[RotoZoomTransition transitionWithDuration:1.2f scene:pl]];

   Posted 2 years ago #
3. 

   friken
   Member

   I got it to work with this:
   
RotoZoomTransition *t = [RotoZoomTransition node];
[[Director sharedDirector] replaceScene:[t initWithDuration:1.2f scene:pl]];


   I don't understand why. Anyone know how the example/demo is working with transitionWithDuration, but I need to call initWithDuration for it to work? I don't see an init anywhere in the demo.

   Posted 2 years ago #
4. 

   Joao Caxaria
   Member

   In the demo, don't they use:

   [RotoZoomTransition transitionWithDuration:1.2f scene:pl]; ?

   That's the only difference that I can see, calling a static method from the class definition vs calling it on a instance of the class.

   Posted 2 years ago #

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