小编Jae*_*eSo的帖子

我是 React 的新手，我收到此错误：

警告：无法对卸载的组件执行 React 状态更新。这是一个空操作，但它表明您的应用程序中存在内存泄漏。要修复，请取消 useEffect 清理函数中的所有订阅和异步任务。

据我了解，似乎我有内存泄漏并且需要对 useCallback 钩子进行 useEffect 清理？

我尝试添加一个useRef来检查安装，但返回不会将状态更改为 false。

const MyComponent = ({data}) => {
  const mounted = useRef(true);
  const [loading, setLoading] = useState(false);

  const isLoading = useCallback(async () => {
    setLoading(true);

    if (data) {
      console.log('YAY DATA: ', data);
    }

    return () => {
      setLoading(false); // unreachable code
      mounted.current = false; // does this do the cleanup?
    };
  }, [loading]);

  return (
    //...some component
  );
};

export default MyComponent;

我正在尝试更新到react@17.0.1和react-native@0.64.0-rc.0，但遇到以下错误：

npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR! 
npm ERR! While resolving: undefined@undefined
npm ERR! Found: react@16.13.1
npm ERR! node_modules/react
npm ERR!   react@"16.13.1" from the root project
npm ERR! 
npm ERR! Could not resolve dependency:
npm ERR! peer react@"17.0.1" from react-native@0.64.0-rc.0
npm ERR! node_modules/react-native
npm ERR!   react-native@"0.64.0-rc.0" from the root project
npm ERR! 
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force, or --legacy-peer-deps
npm ERR! to …