vue3 setup+Taro3 调用原生小程序自定义年月日时分多列选择器，NutUI改造-编程知识

vue3 setup+Taro3 调用原生小程序自定义年月日时分多列选择器，NutUI改造

NutUI 有日期时间选择器，但是滑动效果太差，卡顿明显。换成原生小程序很顺畅

在这里插入图片描述

上代码：

<template><view><pickermode="multiSelector"@change="confirmPicker"@columnChange="scrollColumnChange":value="columnVal":range="multiArray"><nut-celltitle="选择时间":desc="showVal"@click="copyColumnVal = columnVal"></nut-cell><!-- <view @click="copyColumnVal = columnVal">当前选择：{{ showVal }}</view> --></picker></view>
</template><script setup>
import { ref, onMounted, watch } from "vue";
const multiArray = ref(undefined); // 列可选列表
const columnVal = ref(undefined); // 列当前选中值
const copyColumnVal = ref(undefined); // 记录滚动中数据
const showVal = ref(undefined); // 显示：后年月日时分// 个位数时 补0
const add0 = (num) => String(num > 9 ? num : "0" + num);// 判断平年闰年
const resYearType = (year) =>(year % 4 == 0) & (year % 100 != 0) || year % 400 == 0;// 获取当前时间
const getNowT = (timeInfo) => {// timeInfo 为 年月日字符串 或者 时间戳var nowT = new Date(timeInfo);return {year: nowT.getFullYear(),month: nowT.getMonth() + 1,day: nowT.getDate(),hour: nowT.getHours(),minute: nowT.getMinutes(),second: nowT.getSeconds(),};
};// 设置当前时间 - columnVal：每列索引数组集合
function setNowTime(timeStr) {const timeObj = getNowT(timeStr); // timeObj 为： { year, month, day... }const { year, month, day, hour, minute } = timeObj;// 获取滚动列表数据const [years,months,days,hours,minutes,] = multiArray.value;const yearsIdx = years.findIndex((item) => item == year);const monthsIdx = months.findIndex((item) => item == month);const daysIdx = days.findIndex((item) => item == day);const hoursIdx = hours.findIndex((item) => item == hour);const minutesIdx = minutes.findIndex((item) => item == minute);columnVal.value = [yearsIdx, monthsIdx, daysIdx, hoursIdx, minutesIdx];showVal.value = `${year}/${add0(month)}/${add0(day)} ${add0(hour)}:${add0(minute)}`;// 根据当前时间，初始化可选择日期时间setDaysList(columnVal.value)
}// 初始化时间
function initColumn(daysNum = 31) {// 年const yearStart = 2000; // 年 - 开始时间const yearLength = 100; // 年 - 列表长度const years = Array.from({ length: yearLength }).map((i, idx) =>add0((idx += yearStart)));// 月const months = Array.from({ length: 12 }).map((i, idx) => add0((idx += 1)));// 日const days = Array.from({ length: daysNum }).map((i, idx) =>add0((idx += 1)));// 时const hours = Array.from({ length: 24 }).map((i, idx) => add0((idx += 0)));// 分const minutes = Array.from({ length: 60 }).map((i, idx) => add0((idx += 0)));multiArray.value = [years,months,days,hours,minutes,];
}// 滚动设置可选天数 28 - 29 - 30 - 31
function setDays(daysNum = 31) {multiArray.value[2] = Array.from({ length: daysNum }).map((i, idx) =>add0((idx += 1)));// 深拷贝下，否则不动态修改列multiArray.value = JSON.parse(JSON.stringify(multiArray.value));
}// 修改每月的天数
function setDaysList(columnArr) {const [yearsIdx, monthsIdx] = columnArr;const [years] = multiArray.value;// 当选择2月if (monthsIdx == 1) {// 如果闰年if (resYearType(years[yearsIdx])) {setDays(29);} else {setDays(28);}} else if ([1, 3, 5, 7, 8, 10, 12].includes(monthsIdx + 1)) {// 当选择1, 3, 5, 7, 8, 10, 12月setDays(31);} else {setDays(30);}
}// 确认选中结果
function confirmPicker(e) {columnVal.value = e.detail.value;const [yearsIdx, monthsIdx, daysIdx, hoursIdx, minutesIdx] = e.detail.value;const [years, months, days, hours, minutes] = multiArray.value;showVal.value = `${years[yearsIdx]}/${months[monthsIdx]}/${days[daysIdx]} ${hours[hoursIdx]}:${minutes[minutesIdx]}`;
}// 滚动事件（未点击确定）
function scrollColumnChange(e) {const { column, value } = e.detail;copyColumnVal.value[column] = value;setDaysList(copyColumnVal.value);console.log("修改的列为", column, "，值为", value);
}// 初始化
onMounted(() => {initColumn();// 回显时间setNowTime(new Date().getTime());
});// 监听传递日期
const props = defineProps({propsTime: {type: String,default: ''}
})
watch(props.propsTime, (newValue, oldValue) => {console.log('值发生了变更', newValue, oldValue);// 回显时间setNowTime(newValue);
});</script>