关于Armature::create()的问题

ArmatureDataManager::getInstance()->addArmatureFileInfo("hero/hero.ExportJson");

Armature* arm =Armature::create("hero");//编译报错

arm->getAnimation()->play("default");

arm->setPosition(Point(visibleSize.width*0.5,visibleSize.height*0.5));

this->addChild(arm);

PS：第二行代码编译报错，原因应该是
AnimationData *animationData = armatureDataManager->getAnimationData(name);
其中animationData＝NULL；