Creator 1.2.0 getComponent(MeshRenderer) null in native,on browser working fine!

I’m running on CC 3D 1.2.0 but getComponent of node always return null in native.

Give too little information and you don’t see the problem

Hi.I met a stuck with this.
The getComponent() in CC 1.2.0 like : this.node.getComponent(Mesh),Animation,…
the engine always return null in native.But it’s working perfectly in test on browser.