刚体的rigidBody对象怎么获取

[roderic1413 (Roderic)]

如题，按官方文档这样写代码，程序报错说rigidbody.linearVelocity()方法不存在，请问怎么解决？

[27021004 (骑麟子)]

getComponent(cc.RigidBody)

[roderic1413 (Roderic)]

谢谢啦