Refresh previous screen on goBack()

Question

I am new to React Native. How can we refresh/reload previous screen when returning to it by calling goBack()?

Lets say we have 3 screens A, B, C:

<

Answer 1

On your screen B constructor will work like magic :)

    this.props.navigation.addListener(
          'didFocus',
          payload => {
            this.setState({is_updated:true});
          }
    );