Cocos creator collision and collision callback do not take effect

1、 Collision does not take effect
Remember that , When using physics , Be sure to turn on physics first ：
cc.director.getPhysicsManager().enabled = true;
Only in onLoad() in Turn on It works , stay onEnable() perhaps start() All invalid
2. Collision callback does not take effect
If you want to execute the collision callback function in the official document , Two things to note
（1） Check the following options for rigid bodies , Rigid bodies that collide, whether dynamic or static , Both need to be checked

（2） Start collision callback
cc.director.getCollisionManager().enabled = true;