报错信息是:
Warning: Can't call setState (or forceUpdate) 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.
项目中tab切换,内容封装成来一个子组件,在跳转到别的路由页面,然后再返回该页面点击tab切换的时候报上述错误,找了很久的原因,目前得到的分析应该是,在路由跳转过来的时候子组件还未加载到,此时点击切换tab栏(这里需要setState),就会报上述的错误,解决办法如下:
设置变量let isMounted = false
然后在componentDidMount周期设置:
componentDidMount(){
isMounted = true;
}
在componentWillUnmount周期设置:
componentWillUnmount(){
isMounted = false
}
组件render这里判断isMounted的值:
{isMounted && this.state.activeIndex === 1 && <div className="tabC01"><FTab tabCon={'tabCon01'}/></div>}