Bool isScheduled(SEL_SCHEDULE selector)

请问这个函数怎么用? 实现了?cocos2d-2.0-x-2.0.2,
需要更新代码不?

1>GameScene.obj : error LNK2001: 无法解析的外部符号 “__declspec(dllimport) public: bool __thiscall cocos2d::CCNode::isScheduled(void (__thiscall cocos2d::CCObject::*)(float))” (_imp?isScheduled@CCNode@cocos2d@@QAE_NP8CCObject@2@AEXM@Z@Z)