在微信小程序项目开发中，大家往往会遇到日期选择器的需求，分享一下关于日期选择器的代码，可选择具体的日期。
一、.js代码
//获取年月日
const date = new Date()
const nowYear = date.getFullYear()
const nowMonth = date.getMonth() + 1
const nowDay = date.getDate()
let daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
// 根据年月 获取当月的总天数
let getDays = function (year, month) {
console.log(year, month);
if (month === 2) {
return ((year % 4 === 0) && ((year % 100) !== 0)) || (year % 400 === 0) ? 29 : 28
} else {
return daysInMonth[month - 1]
}
}
// 根据年月日设置当前月有多少天 并更新年月日数组
let setDate = function (year, month, day, _th) {
let daysNum = year === nowYear && month === nowMonth ? nowDay : getDays(year, month)
day = day > daysNum ? 1 : day
let monthsNum = year === nowYear ? nowMonth : 12
let years = []
let months = []
let days = []
let yearIdx = 9999
let monthIdx = 0
let dayIdx = 0
// 重新设置年份列表
for (let i = 1950; i <= nowYear; i++) {
years.push(i)
}
years.map((v, idx) => {
if (v === year) {
yearIdx = idx
}
})
// 重新设置月份列表
for (let i = 1; i <= monthsNum; i++) {
months.push(i)
}
months.map((v, idx) => {
if (v === month) {
monthIdx = idx
}
})
// 重新设置日期列表
for (let i = 1; i <= daysNum; i++) {
days.push(i)
}
days.map((v, idx) => {
if (v === day) {
dayIdx = idx
}
})
_th.setData({
years: years, //年份列表
months: months, //月份列表
days: days, //日期列表
value: [yearIdx, monthIdx, dayIdx],
year: year,
month: month,
day: day
})
}
Page({
/**
* 页面的初始数据
*/
data: {
years: [],
months: [],
days: [],
year: nowYear,
month: nowMonth,
day: nowDay,
value: [9999, 1, 1]
},
/**
* 生命周期函数--监听页面加载
*/
onl oad: function (options) {
setDate(this.data.year, this.data.month, this.data.day, this)
},
bindChange: function (e) {
let val = e.detail.value
setDate(this.data.years[val[0]], this.data.months[val[1]], this.data.days[val[2]], this)
}
})二、.WXML代码
<view class="birthBox">
<label>日期</label>
<picker-view wx:if="{{years.length>0 && months.length>0 && days.length>0}}" style="width: 100%; height: 180rpx;" value="{{value}}" bindchange="bindChange">
<picker-view-column>
<view wx:for="{{years}}" wx:key="index">{{item}}年</view>
</picker-view-column>
<picker-view-column>
<view wx:for="{{months}}" wx:key="index">{{item}}月</view>
</picker-view-column>
<picker-view-column>
<view wx:for="{{days}}" wx:key="index">{{item}}日</view>
</picker-view-column>
</picker-view>
</view>