React Native：Flash Message 内存泄漏错误

Question

我在 React Native 中使用 Flash Message。当我导航到另一个屏幕而不等待消息消失时，会引发内存泄漏错误。

代码

showMessage({
  message: "Hello World",
  duration: 2000,
  description: "This is our second message",
  type: "success",
});

错误

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in %s.%s, the componentWillUnmount method,

Answer 1

您无需等待即显消息消失。您可以在导航到新屏幕之前以编程方式隐藏消息。

代码

// import hideMessage method from the library
import { hideMessage } from "react-native-flash-message";

// a function which navigates to another screen
foo = () => {
  // assuming you are using react navigation
  // in a class based component
  const { navigation } = this.props;

  // call hideMessage before you navigate
  hideMessage();
  navigation.navigate('ScreenName');
}

Answer 2

使用 useEffect() 的解决方案

import { hideMessage } from "react-native-flash-message";


  useEffect(() => {
    return () => {
      hideMessage()
    }
  }, [])