react-native - 你如何从 React Native 的 EventEmitter 实例中移除一个监听器？

Question

有removeCurrentListener ，但没有 removeListener方法。

Answer 1

我自己找到了答案。

https://github.com/facebook/react-native/blob/235b16d93287061a09c4624e612b5dc4f960ce47/Libraries/vendor/emitter/EventEmitter.js
addListener返回 EmitterSubscription扩展 EventSubscription 的实例有 remove方法。

https://github.com/facebook/react-native/blob/235b16d93287061a09c4624e612b5dc4f960ce47/Libraries/vendor/emitter/EventSubscription.js

const emitter = new EventEmitter();

const subscription = emitter.addListener('eventname', () => {});

subscription.remove(); // Removes the subscription