Refresh previous screen on goBack()

Solution 1:

Adding an Api Call in a focus callBack in the screen you're returning to solves the issue.

componentDidMount() {
    this.props.fetchData();
    this.willFocusSubscription = this.props.navigation.addListener(
      'willFocus',
      () => {
        this.props.fetchData();
      }
    );
  }

  componentWillUnmount() {
    this.willFocusSubscription.remove();
  }

UPDATE 2021:

  componentDidMount() {
    this.props.fetchData();
    this.willFocusSubscription = this.props.navigation.addListener(
      'willFocus',
      () => {
        this.props.fetchData();
      }
    );
  }

  componentWillUnmount() {
    this.willFocusSubscription();
  }

If you use React Hook:

  React.useEffect(() => {
      fetchData();
      const willFocusSubscription = props.navigation.addListener('focus', () => {
        fetchData();
    });

    return willFocusSubscription;
}, []);

Solution 2:

How about using useIsFocused hook?

https://reactnavigation.org/docs/function-after-focusing-screen/#re-rendering-screen-with-the-useisfocused-hook

const componentB = (props) => { 
  // check if screen is focused
  const isFocused = useIsFocused();

  // listen for isFocused, if useFocused changes 
  // call the function that you use to mount the component.

  useEffect(() => {
    updateSomeFunction()
  },[isFocused]);
}