react 內存溢出問題

警告  ：   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 the componentWillUnmount method.

 

解決方式 

 

componentWillUnmount = () => {
    this.setState = (state,callback)=>{
      return;
    };
}