Which version of cocos2d should I choose?
I am new to cocos2d. There are like 2.x and 3.0 versions. If I want develop for iOS 7, should I choose 3.0? What is the difference between?
If you want to choose the most iOS 7-compatible version of Cocos2D, choose 3.0. However, the team fixed iOS 7-compatibility in version 2.1.4.
For a basic change log for 3.0, visit this: http://www.cocos2d-iphone.org/development/