Question

47

react native DeviceEventEmitter unsubscribe from event

rated 0 times [ 48] [ 1] / answers: 1 / hits: 16984 / 5 Years ago, tue, october 8, 2019, 12:00:00

I'm using DeviceEventEmitter to handle events of a favorite method, to which is subscribed in the constructor:

DeviceEventEmitter.addListener(FavoriteClick, async (e) => 

{

    // do something

})

This event listener stays active whenever the components unmounts (permenantly). What do I have to call to unsub? I've tried storing the event as a variable and calling listener.removeCurrentListener() in the componentWillUnmount() like the (limited) documentation states, if I understand that correctly, but removeCurrentListener() is not a method.

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answered 5 Years ago devinjadong · Accepted Answer

DeviceEventEmitter is deprecated, you should use NativeEventEmitter instead.

Example :

import { NativeEventEmitter, NativeModules } from 'react-native';



const { CalendarManager } = NativeModules;



const calendarManagerEmitter = new NativeEventEmitter(CalendarManager);



const subscription = calendarManagerEmitter.addListener(

  'EventReminder',

  (reminder) => console.log(reminder.name)

);



...



// Don't forget to unsubscribe, typically in componentWillUnmount

subscription.remove();