子组件传值回父组件

父组件 BECanlendar
子组件 Canlendar

class BECanlendar extends React.Component{
constructor(){
        super();
        this.state ={
            "year":2005,
            "month":1,
            "day":5
        }
    }

    onpick({year , month , day}){
        console.log("我是BE中的onpick");
        this.setState({year , month , day});
    }

    render(){
    <div className="end_result result"> 
    //通过onpick={(this.onpick).bind(this)} 绑定函数从子组件传回父组件
      <Canlendar {...this.state}  onpick={(this.onpick).bind(this)} />
    </div>
    }
}

class Canlendar extends React.Component{

      goNextMonth(){
         if(this.state.month != 12){
         //这种setState只能刷新当前页面，并不能传回父组件
            this.setState({"month" : this.state.month + 1});
         }
     }
   componentDidMount(){
        var self = this;
        $(this.refs.table).delegate("td.inmonth","click",function(){
            self.setState({"day" : Number($(this).attr("data-day"))})
    //传给父亲,通过this.props.onpick(),this.props.传入属性，来传回至父组件使其该百年
            self.props.onpick(self.state);
        });

}