Passing params in Redux + React Native + react-navigator

Question

I am trying to pass a param from MenuScreen.js to the ProfileScreen.js. I am new to React Native and Redux. Using react-navigation for navigation, I am able to push to new screen with a button.

Using

Button onPress={() => dispatch(NavigationActions.navigate({ routeName: 'Profile', params: { user: 'baz' } }))} title="Profile" />

I am able to pass the params but I don't know how access it on the profile screen.

Using

this.props.navigation.state.params

in ProfileScreen.js is giving an error that

this.props.navigation

is undefined.

Below is the code,

MainScreen.js

const MainScreen = ({ dispatch }) => {

return (
<View>

  <Button
    onPress={() =>
      dispatch(NavigationActions.navigate({ routeName: 'Profile', params: { user: 'baz' } }))}
    title="Profile"
  />
</View>
);
};

MainScreen.propTypes = {
dispatch: PropTypes.func.isRequired,
};

MainScreen.navigationOptions = {
title: 'Main',
}; 

const mapStateToProps = state => ({

});

export default connect(mapStateToProps)(MainScreen);

ProfileScreen.js

const params  = this.props.navigation.state.params;

const ProfileScreen = () => (
  <View style={styles.container}>
  <Text style={styles.welcome}>
   {params}
  </Text>
  </View>
);

ProfileScreen.navigationOptions = {
 title: 'Profile',
};

export default ProfileScreen;

index.reducer.js

import { AppNavigator } from '../navigators/AppNavigator';

const initialNavState = AppNavigator.router.getStateForAction(
  AppNavigator.router.getActionForPathAndParams('Main')
);

function nav(state = initialNavState, action) {
  let nextState;
  switch (action.type) {
    default:
      nextState = AppNavigator.router.getStateForAction(action, state);
      break;
  }
  return nextState || state;
}

const AppReducer = combineReducers({
  nav,
});

export default AppReducer;

AppNavigator.js

import MainScreen from '../components/MainScreen';
import MainScreen from '../components/MainScreen';
import ProfileScreen from '../components/ProfileScreen';

export const AppNavigator = StackNavigator({
 Main: { screen: MainScreen },
 Profile: { screen: ProfileScreen },
});

const AppWithNavigationState = ({ dispatch, nav }) => (
  <AppNavigator navigation={addNavigationHelpers({ dispatch, state: 
  nav })} /> 
);

AppWithNavigationState.propTypes = {
   dispatch: PropTypes.func.isRequired,
   nav: PropTypes.object.isRequired,
};

const mapStateToProps = state => ({
 nav: state.nav,
});

export default connect(mapStateToProps)(AppWithNavigationState);

index.ios.js

class NavChecks extends React.Component {
store = createStore(AppReducer);

render() {
  return (
    <Provider store={this.store}>
      <AppWithNavigationState />
    </Provider>
    );
  }
}

AppRegistry.registerComponent('NavChecks', () => NavChecks);

export default NavChecks; 

Answer 1

Try passing props to ProfileScreen:

const ProfileScreen = (props) => (
  <View style={styles.container}>
  <Text style={styles.welcome}>
   {props.navigation.state.params.user}
  </Text>
  </View>
);

Answer 2

I had the same problem and I solved it by using withNavigation in react-navigation.

import { withNavigation } from 'react-navigation';
export default connect(mapStateToProps, mapDispatchToProps)(withNavigation(MyComponent));

https://reactnavigation.org/docs/en/with-navigation.html

Answer 3

try passing props to ProfileScreen. In my point of view use react-native-router-flux for navigation which is more flexible i think in which you can pass parameters as props while navigating to the other page