react js 按条数 展开／折叠

//2条
const MAX_SHOW_NUM = 2;class HotDiscuss extends Component { static propTypes = {
//验证
repliedCommentList: PropTypes.array,
}; constructor(props) {
super(props);
this.state = {
//子评论折叠
isClick: true,
//评论
disClick: false,
//点赞
handle_like: false,
//子评论点赞
child_handle_like: false, }
} //生命周期
componentWillMount() {
//要数据
this.props.getDiscussListData(this.props.routeParams);
//分享
YztApp._setShareIsAvailable(false);
}//子评论
renderContent(detail, repliedCommentList) { //childitem: 子评论数组
//isShowMoreBtn: 子评论是否显示折叠几个字 let childitem, isShowMoreBtn;
if (repliedCommentList && repliedCommentList.length) { // >2条显示文字
isShowMoreBtn = repliedCommentList.length > 2; // 展开/折叠
repliedCommentList = repliedCommentList.slice(0, this.state.isClick ? MAX_SHOW_NUM : repliedCommentList.length); childitem = repliedCommentList.map((c, k) => {
return (
<div key={k} className="child_box">
<p className="child_img">
<img src={c.imageUrl} alt=""/>
</p>
<div className="dis_child_text" >
<div className="child_context">
<span ref="child_like" className="dis_praise">{c.likeCount}</span>
<p className="dis_child_left">
<span className="dis_child_name" >{c.senderName}</span>
<span className="dis_child_name hf" >回复</span>
<span className="dis_child_name" >{c.receiverName}</span>
</p>
</div>
<p className="dis_date">{c.createdTimeStr}</p>
<p className="child_text">{c.content}</p>
</div>
</div>
)
})
}
return (
//评论 );
} render() {
const {
detail,
//detail.repliedCommentList,
} = this.props;
return this.renderContent(detail, detail.repliedCommentList)
}// 展开/收起
child_open(){
this.setState({
isClick: !this.state.isClick,
})
}}