主要類：
CCNode

   CCDirector
   CCScene
   CCLayer


定時更新：

   [[[CCDirector sharedDirector] scheduler] scheduleUpdateForTarget:self priority:0 paused:NO];

   //[[[CCDirector sharedDirector] scheduler] unscheduleUpdateForTarget:self];

接收輸入：
   v0.99

      CCStandardTouchDelegate

      CCTargetedTouchDelegate

   v2.10

      CCTouchOneByOneDelegate

      CCTouchAllAtOnceDelegate

   [[[CCDirector sharedDirector] touchDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];

   //[[[CCDirector sharedDirector] touchDispatcher] removeDelegate:self];

坐標系統：
   position是設置相對于父親節點的坐標
   self.anchorPoint和self.position重合

多層：
   [cclayer.addchild cclayer];
   一層疊一層