Warning:
setState(...): Can only update a mounted or mounting component.
This usually means you called setState() on an unmounted component.
This is a no-op.
Please check the code for the xxx component.
大概意思就是我们可能对一个没有装载的组件执行了setState()操作,在React的官网里有一个解决这个办法的方案,isMounted
原因:
Such situations most commonly occur due to callbacks,
when a component is waiting for some data and gets unmounted before the data arrives.
Ideally, any callbacks should

在React应用中,遇到'setState(...): Can only update a mounted or mounting component...'警告,通常是因为异步请求返回的数据尝试更新已被卸载的组件。解决方法是在组件实例中设置一个状态标志,在componentDidMount中设置为true,componentWillUnmount中设置为false。只有当标志位为true时,才执行setState,避免对已卸载组件的操作。
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