问题描述
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,
解决方法
您无需等待 Flash 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');
}
,
useEffect() 的解决方案
import { hideMessage } from "react-native-flash-message";
useEffect(() => {
return () => {
hideMessage()
}
},[])