uniapp 使用uview 组件 DatetimePicker 默认值无效问题

1.DatetimePicker 默认值无效问题  -- 解决办法：使用$refs解决

<u-datetime-picker 
    ref="defaultPicker" 
    :show="openDatePicker" 
    :value="dateValue" 
    mode="date"
	minDate="-2209017943" 
    closeOnClickOverlay 
    confirmColor="#FF4E76" 
	@confirm="onConfirmPicker" 
    @cancel="onClosePicker"
	@close="onClosePicker">
</u-datetime-picker>

export default {
    data() {
        return {
            openDatePicker:false,
            dateValue:Number(new Date()),//设置初始值
        }
    },
    methods: {
        onShowDatePicker(e) { // 需要回显的值e: '2021-06-08'
            this.$refs.defaultPicker.innerValue = new Date(e).getTime();
            this.openDatePicker = true; 
        },
    },
}