Function initDate

component/DatePicker.js:24–27

(defaultValue=this.props.value)

    },

    initDate(defaultValue=this.props.value){
        const {year, month, day} = dateStr2Obj(defaultValue, this.dateParams());
        return obj2DateStr(year, month, day);
    },

    dateParams(){
        const {begin, end} = this.props;