vant-日期使用

<template>
    <div>
        <van-field
                v-model="result"v-bind="$attrs"readonly
                is-link
                @click="show = !show"
        />
        <van-popup v-model="show" position="bottom">
            <van-datetime-picker
                    show-postal
                    type="date"
                    :formatter="formatter"
                    :title="$attrs.label"@cancel="show = !show"@confirm="onConfirm"@change="changeFn"
            />
        </van-popup>
    </div>
</template>

<script>export default{
        model:{
            prop: "selectValue"},props:{
            columns:{
                type: Array},selectValue:{
                type: String}
        },data() {
            return{
                show: false,result: this.selectValue
            };
        },methods:{
            onConfirm(value) {
                this.result = this.timeFormat(value);
                this.show = !this.show;
            },timeFormat(time) { //时间格式化 2019-09-08
                let year = time.getFullYear();
                let month = time.getMonth() + 1;
                let day = time.getDate();
                return year + '-' + month + '-' +day;
            },
            //选项格式化函数
            formatter (type,value) {
                if (type === 'year') {
                    return`${value}年`
                } else if (type === 'month') {
                    return`${value}月`
                } else if (type === 'day') {
                    return`${value}日`
                } else if (type === 'hour') {
                    return`${value}时`
                } else if (type === 'minute') {
                    return`${value}分`
                } else if (type === 'second') {
                    return`${value}秒`
                }
                returnvalue
            },changeFn() { //值变化是触发
                // this.result = this.result
            },},watch:{
            selectValue: function(newVal) {
                this.result =newVal;
            },result(newVal) {
                this.$emit("input",newVal);
            }
        }
    };
</script>

<style></style>

 <date-picker
      :label="item.label"placeholder="请选择"v-model="dataList[item.name]"
      :required="item.mandatory"
      :rules="[{ required: item.mandatory, message: '请选择'+item.label}]"
/>