【已解决】React 调用函数竟然不对，提示这个函数undefined

Question

goToDetail(){console.log("看看能出来吗？")}renderComment({name,author,uploadTime,description,category,sraID}){switch(category){case"0":return"other";case"1":return"project";case"2":return"paper";case"3":return"book";case"4":return"certificate";case"5":return"patent";case"6":return"picture";}return({name}{author}-{uploadTime}描述：{description});}render(){if(this.state.contents){return({this.state.contents.map(this.renderComment)})}else{return()}}不知道什么原因，求大神解答。。。

Answer 1

手动绑定下this
constructor(){
super();
this.renderComment=this.renderComment.bind(this);
}
用箭头函数
renderComment=()=>{}