Which life cycle method will be called when returning from another page in react native?

Question

I have a page A, then navigate to page B, then go back. I want to know which life cycle method will be called on A, or event will be emitted?

Answer 1

When using react-navigation, you can subscribe to the didFocus and didBlur events to be notified when the user navigates to or from a screen.

You can set these up in your component's componentDidMount using the addListener method of this.props.navigation like this:

componentDidMount() {
    this.props.navigation.addListener("didFocus", () => {
        // user has navigated to this screen
    });

    this.props.navigation.addListener("didBlur", () => {
        // user has navigated away from this screen
    });
}