While working on my current project which uses a lot of cocos2d actions to create character animations (as opposed to frame by frame animations) I found it incredibly difficult to make decent looking animations as I had to do trial and error to place movements.
So today I start building a tool in AIR and an interpreter in Obj-C which will allow you to take a timeline animation in Adobe Flash, export the keyframes into my tool then export a PList file for Obj-c which my interpreter will convert to Cocos2d actions. So far everything is going well, but I still have bug testing and project saving/loading to implement.
Currently the tool will take the position of the object in flash and can handle changes in x,y,scaleX,scaleY and rotation for 'Classic Tweens', but not the new Motion Editor Tweens. It also will account for basic easing from flash and convert into CCEaseIn or CCEaseOut actions.
I will release the tool and source as soon as bug test some more and complete the AIR tool.
Here is a quick video demo I made showing how to export from flash to my tool then to Cocos2d (sorry about the big green watermark, but I havent payed for IShowU yet):
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