首先这肯定是组合序列动作CCSequence
既然要让A执行完，那么B函数写在A函数的最后是最简单的
然后延迟执行B函数
CCDelayTime* delayTime = CCDelayTime::create(时间);
CCCallFunc *callFunND = CCCallFun::create(this, callfunc_selector(这里写上函数);
//组合起来
CCFiniteTimeAction* seq = CCSequence::create(delayTime, callFunc, NULL);
//然后进行播放
CCSequence *action = CCSequence::create(seq );
//也可以直接
CCSequence *action = CCSequence::create(delayTime,callFunND, NULL );
