react切换组件导致内存泄漏怎么解决

Question

react函数式组件切换时，控制台会报如下错误：
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 a useEffect cleanup function.
原因是组件销毁后，仍调用了setState，怎么才能知道是哪个state导致的报错，并且怎么在销毁前取消setState呢？

Answer 1

跟一下代码。看看触发销毁的操作，掉了销毁的组件里的那个state