微信小程序实现日期时间筛选器
开发微信小程序过程中,有个需求需要用到日期时间筛选器,查看微信官方文档后,发现官方文档的picker筛选器只能单独支持日期或者是时间,所以为了实现需求自己参考企业微信封装了个日期时间筛选器组件。
原理
筛选器的实现,我参考的是小程序官方方式,通过半屏弹窗(mp-half-screen-dialog)结合picker_view进行日期、时间的选择,最终在选择时间后,通过事件触发返回一个change事件,其中参数值为毫秒级时间戳。
实现
1.弹窗的显隐:
在组件的 properties 中传入一个 show 字段,用于控制弹窗的显隐;默认值为 false。
2.筛选器类型:
为了更好的兼容性,提供一个 type 字段,用于控制筛选器的所支持 可选择日期 的走向(往前、往后、前后都支持);默认值为 center(前后都支持)。
3.时间区间(年):
year 字段用于控制筛选器的年维度时间区间范围;默认值为 1。
4.时间区间(月):
month 字段用于控制筛选器的月维度时间区间范围。默认值为 ‘undefined’****(声明’month’ 不为undefined时 year失效)。
具体思路:整体思路是监听弹窗的显隐(show),当弹窗显示时,获取对应配置项(类型、年、月)计算对应筛选器的范围,并初始化默认日期时间为当前年月日时分。
以下是效果图以及具体代码实现:
wxml代码
<mp-half-screen-dialog show="{{ show }}" maskClosable="{{ true }}" closabled="{{ false }}" extClass="f-date-dialog" catchtouchmove="preventTouchMove" bindclose="bindclose"> <view slot="desc" class="flex column full-width full-height"> <view class="bd flex full-width"> <!-- 日期 --> <view class="flex1 flex column align-items-center"> <picker-view indicator-style="height: 50px;" mode="selector" value="{{ [dateIndex] }}" class="selector__picker" bindchange="dateChange"> <picker-view-column> <view wx:for="{{ dateArr }}" wx:key="index" style="line-height: 50px" class="text-center {{ item.name.length < 10 ? 'h4' : 'h6' }}">{{ item.name }}</view> </picker-view-column> </picker-view> </view> <!-- 小时 --> <view class="flex1 flex column align-items-center"> <picker-view indicator-style="height: 50px;" mode="selector" value="{{ [hourValue] }}" class="selector__picker" bindchange="hourChange"> <picker-view-column> <view wx:for="{{ hourArr }}" wx:key="index" style="line-height: 50px" class="text-center">{{ item }}</view> </picker-view-column> </picker-view> </view> <!-- 分钟 --> <view class="flex1 flex column align-items-center"> <picker-view indicator-style="height: 50px;" mode="selector" value="{{ [minValue] }}" class="selector__picker" bindchange="minChange"> <picker-view-column> <view wx:for="{{ minArr }}" wx:key="index" style="line-height: 50px" class="text-center">{{ item }}</view> </picker-view-column> </picker-view> </view> </view> <view class="ft flex align-items-center justify-content-space-between"> <button type="default" style="width:45%;height: 40px;" class="weui-btn" bindtap="bindclose">取消</button> <button type="primary" style="width:45%;height: 40px;margin-top:0" class="weui-btn" bindtap="handleSubmit">确定</button> </view> </view> </mp-half-screen-dialog>
js代码
const utils = require('../../utils/util') Component({ options: { addGlobalClass: true }, properties: { show: { type: Boolean, value: false, observer: '_showChange' }, type: { type: String, value: 'center' // 类型:'left' -- 现在往前 'center' -- 往前&往后 'right' -- 现在往后 }, year: { type: Number, value: 1 // '时间区间{year}年' month不为undefined时该项失效 }, month: { type: [Number, String], value: 'undefined' // 'month' 不为undefined时 year失效 } }, data: { dateIndex: null, hourValue: '', minValue: '', dateArr: [], hourArr: [], minArr: [], activeTime: null // 抛出的时间戳 }, methods: { _showChange(e) { if (e) { this.handleDateData() this.initData() } }, handleSubmit() { this.bindclose() this.triggerEvent('change', { value: this.data.activeTime }) }, initData() { const now = +new Date() const index = this.data.dateArr.map(v => v.name).indexOf(utils.formatTime(now, '{m}月{d}日周{a}')) let tmp = this.data.dateArr tmp[index].name = '今天' this.setData({ dateIndex: index, hourValue: utils.formatTime(now, '{h}'), minValue: utils.formatTime(now, '{i}'), dateArr: tmp, activeTime: now }) }, handleDateData() { const nowYear = new Date().getFullYear() let mins = [] let hours = [] let dates = [] // 获取小时、分钟数组 for (let i = 0; i < 60; i++) { mins.push(i.toString().length < 2 ? '0' + i : i.toString()) } for (let j = 0; j < 24; j++) { hours.push(j.toString().length < 2 ? '0' + j : j.toString()) } dates = this.getDays(nowYear) this.setData({ hourArr: hours, minArr: mins, dateArr: dates }) }, getDays(year) { let pre_days = [] let now_days = [] let aft_days = [] if (this.data.month == 'undefined') { /** 按年处理 */ // 判断类型 if (this.data.type == 'left') { for (let a = this.data.year; a >= 1; a--) { pre_days.push(...this.getDaysByYear(year - a, true)) } } else if (this.data.type == 'right') { for (let b = 1; b <= this.data.year; b++) { aft_days.push(...this.getDaysByYear(year + b, true)) } } else { for (let a = this.data.year; a >= 1; a--) { pre_days.push(...this.getDaysByYear(year - a, true)) } for (let b = 1; b <= this.data.year; b++) { aft_days.push(...this.getDaysByYear(year + b, true)) } } now_days = this.getDaysByYear(year) } else { /** 按月处理 */ now_days = this.getDaysByMonth(year, this.data.type) } return pre_days.concat(now_days.concat(aft_days)) }, getDaysByYear(year, isIncludeYear) { let days = [] for (let k = 1; k < 13; k++) { let each_days = new Date(year, k, 0).getDate() for (let _k = 1; _k <= each_days; _k++) { let time = +new Date(`${year}-${k}-${_k}`) if (isIncludeYear) { days.push({ name: utils.formatTime(time, '{y}年{m}月{d}日周{a}'), value: time }) } else { days.push({ name: utils.formatTime(time, '{m}月{d}日周{a}'), value: time }) } } } return days }, getDaysByMonth(year, type) { let days = [] let nowMonth = new Date().getMonth() + 1 // 当月份传负的或0时当成本月 if (this.data.month > 0) { let months = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12] let pre_mons = [] let aft_mons = [] // 生成往前、往后的月份数组 for (let k = 1; k <= this.data.month; k++) { let tmp_pre = months.indexOf(nowMonth) - k let tmp_aft = months.indexOf(nowMonth) + k pre_mons.unshift(months[tmp_pre < 0 ? 12 + tmp_pre : tmp_pre]) aft_mons.push(months[tmp_aft > 12 ? tmp_aft - 12 : tmp_aft]) } if (type != 'right') { // 往前的月份的日期 pre_mons.forEach(v => { // 跨年 let month_days = 0 if (v > nowMonth) { month_days = new Date(year - 1, v, 0).getDate() for (let k = 1; k <= month_days; k++) { let time = +new Date(`${year - 1}-${v}-${k}`) days.push({ name: utils.formatTime(time, '{y}年{m}月{d}日周{a}'), value: time }) } } else { month_days = new Date(year, v, 0).getDate() for (let k = 1; k <= month_days; k++) { let time = +new Date(`${year}-${v}-${k}`) days.push({ name: utils.formatTime(time, '{m}月{d}日周{a}'), value: time }) } } }) } // 本月的日期 let month_days = new Date(year, nowMonth, 0).getDate() for (let k = 1; k <= month_days; k++) { let time = +new Date(`${year}-${nowMonth}-${k}`) days.push({ name: utils.formatTime(time, '{m}月{d}日周{a}'), value: time }) } if (type != 'left') { // 往后的月份的日期 aft_mons.forEach(_v => { // 跨年 let month_days = 0 if (_v < nowMonth) { month_days = new Date(year + 1, _v, 0).getDate() for (let k = 1; k <= month_days; k++) { let time = +new Date(`${year + 1}-${_v}-${k}`) days.push({ name: utils.formatTime(time, '{y}年{m}月{d}日周{a}'), value: time }) } } else { month_days = new Date(year, _v, 0).getDate() for (let k = 1; k <= month_days; k++) { let time = +new Date(`${year}-${_v}-${k}`) days.push({ name: utils.formatTime(time, '{m}月{d}日周{a}'), value: time }) } } }) } } else { let month_days = new Date(year, nowMonth, 0).getDate() for (let k = 1; k <= month_days; k++) { let time = +new Date(`${year}-${nowMonth}-${k}`) days.push({ name: utils.formatTime(time, '{m}月{d}日周{a}'), value: time }) } } return days }, dateChange(e) { const day = this.data.dateArr[e.detail.value[0]] let time = day.value + (Number(this.data.hourValue) * 3600 + Number(this.data.minValue) * 60) * 1000 this.setData({ dateIndex: e.detail.value[0], activeTime: time }) }, hourChange(e) { const hour = Number(this.data.hourArr[e.detail.value[0]]) let time = this.data.dateArr[this.data.dateIndex].value + (hour * 3600 + Number(this.data.minValue) * 60) * 1000 this.setData({ hourValue: this.data.hourArr[e.detail.value[0]], activeTime: time }) }, minChange(e) { const min = Number(this.data.minArr[e.detail.value[0]]) let time = this.data.dateArr[this.data.dateIndex].value + (Number(this.data.hourValue) * 3600 + min * 60) * 1000 this.setData({ minValue: this.data.minArr[e.detail.value[0]], activeTime: time }) }, bindclose() { this.setData({ show: false }) }, preventTouchMove() { // 阻止半屏状态下 页面滑动 } } })
wxss代码
.selector__picker { width: 100%; height: 80%; margin-top: 20px; font-size: 24px; }
上述代码中,js中引用的 utils 功能函数如下:
/** * 日期格式化 */ export function formatTime(time, cFormat) { if (arguments.length === 0) { return '' } const format = cFormat || '{y}-{m}-{d}' let date if (time === undefined || time === 0 || time === '') { return '' } else if (typeof time === 'object') { date = time } else { if (('' + time).length === 10) time = parseInt(time) * 1000 date = new Date(time) } const formatObj = { y: date.getFullYear(), m: date.getMonth() + 1, d: date.getDate(), h: date.getHours(), i: date.getMinutes(), s: date.getSeconds(), a: date.getDay() } const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => { let value = formatObj[key] // Note: getDay() returns 0 on Sunday if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] } if (result.length > 0 && value < 10) { value = '0' + value } return value || 0 }) return time_str }
另外wxml中使用的一些wxss公共样式就不提供了。
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