Method is not being invoked when i press the button

Question

I am using react navigation and have added a button on the right to signout from my app using default navigation options as shown below :

const otherApp = create         


        

Answer 1

You can also use onFocus method of react-navigation to see whether the screen is on focus or not. If the screen is on focus then call the function.

import { withNavigation } from "react-navigation";
 componentDidMount() {
    const { navigation } = this.props;
    this.focusListener = navigation.addListener("didFocus", () => {
      // The screen is focused
      // Call any action
    });
  }

  componentWillUnmount() {
    // Remove the event listener
    this.focusListener.remove();
  }

export default withNavigation(Your Class Name);

Method : 2

import { NavigationEvents } from "react-navigation";

 onFocus = () => {
 //Write the code here which you want to do when the screen comes to focus.
  };

  render() {
    return (
         {
            this.onFocus();
          }}
        />
)}