屏蔽方法:

进入新的CCLayer时:

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

离开此CCLayer时调用

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

重写方法

- (BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event;

解释:

由于CCMenu 按钮接受按键的优先级为-128(值越小优先级越高)，所有不论处在那一层都会接收到点击 

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

priority: 优先级 kCCMenuHandlerPriority(-128)

swallowsToucher: 是否吃掉按钮不叫其他层再接收了  如果为NO其他层还是一样会接收到Touch数据

注意离开此CCLayer时一定要调用

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

否则下面层将不再接收按键