Module AppRegistry is not registered callable module (calling runApplication)

Question

I am using native base for making app in react-native. I am new to both things. When I run the app It gives me this error:

Here is my code:

Answer 1

I was using native base for my app here is link native base

and you can see there is no app registry like this

 AppRegistry.registerComponent('Point', () => Point) 

but i have to do this to run my app