函数未定义反应滚动中的错误

Question

 import * as Scroll from 'react-scroll';  
 componentDidMount() {    
     Scroll.Events.scrollEvent.register('end', () => {
     this.checkScrollForMobile();
 });

 checkScrollForMobile(){}

获取“未捕获的ReferenceError：checkScrollForMobile未定义”错误，尽管我在下面定义了它。请帮忙。