BodyAnim无法挂载
@property({ type: Animation })
public BodyAnim: Animation|null = null;
换成：
@property({ type: AnimationComponent })
public BodyAnim: AnimationComponent|null = null;
标签：Cocos,Creator,AnimationComponent,BodyAnim,挂载,null From： https://www.cnblogs.com/essaynotes/p/16978065.html