content: import React from 'react';
  import { Provider } from 'react-redux';
  import { store } from './Common';
  import Root from './root';
  import Home from './Home';
  import Wealth from './Wealth';
  
  const App = (props) => (
      <Provider store={store}>
          <Root {...props} />
      </Provider>
  );
  
  export {
      App,
      Home,
      Wealth,
  };
  
  /**
      provider store
      connect (store & dispatch) => (state & actions) => component.props
      <Provider store={store}>
          <Connect>
              <Home />
          </Connect>
      </Provider>
  
      单向数据流 state & props: Parent->Child->Text
      <Parent>
          <Child>
              <Text/>
          </Child>
      </Parent>
  
      onPress -> actions[key] -> dispatch(actionCreator())
          -> store.dispatch(action) -> reducer(store.getState(), action)
          -> changedState -> store -> render
   */
  