目录
1.自定义date-picker具体实现组件的使用 2.结合vant weapp的date-picker具体实现想实现一个可以选择年份和时间段的日期选择器，如下所示
微信小程序自带的picker组件虽然能实现如上的内容，但不能实现样式的修改，不太符合小程序的设计主题，所以考虑了以下两种方法来实现如上的设计。
1.自定义date-picker
把要实现的date-picker封装为一个组件，组件内套用小程序自带的picker-view组件，其中picker_view-column表示不同的选择列，这样可以方便地实现样式的自定义。
实现效果：
具体实现
wxml文件：
<view class="mask" wx:if="{{isShow}}" catchtap="cancel"><view class="content" style="height:800rpx" animation="{{animation}}"><view class="top"><view class="top-text top-left-color" hover-class="top-left-color-hover" catchtap="cancel">取消</view><view class="top-text top-right-color" hover-class="top-right-color-hover" catchtap="confirm">确定</view></view><picker-view style="width: 100%; height: 80%;" value="{{value}}" bindchange="change" catchtap="no"><picker-view-column><view wx:for="{{date_list}}" wx:key="date_list" class="item">{{item}}</view></picker-view-column><picker-view-column><view wx:for="{{time_list}}" wx:key="time_list" class="item">{{item}}</view></picker-view-column></picker-view></view></view>
wxss文件：
.mask {position: fixed;width: 100%;height: 100%;left: 0;right: 0;top: 0;bottom: 0;display: flex;background-color: rgba(0, 0, 0, 0.7);z-index: 9999;flex-direction: column;justify-content: flex-end;}.content {display: flex;flex-direction: column;width: 100%;background: white;border-top-right-radius: 20rpx;border-top-left-radius: 20rpx;}.top {display: flex;flex-direction: row;justify-content: space-between;align-items: center;height: 100rpx;border-bottom: 1rpx solid #d3cfcf;}.top-text {font-size: 30rpx;width: 150rpx;height: 100rpx;display: flex;flex-direction: row;justify-content: center;align-items: center;}.top-left-color {color: #878787;}.top-left-color-hover {color: #f1eaea;}.top-right-color {color: #1296DB;}.top-right-color-hover {color: #82ccf3;}.item {width: 100%;align-items: center;justify-content: center;display: flex;flex-direction: row;font-size: 18px;}
Component({/*** 组件的属性列表*/properties: {range: {//可预约的日期范围。默认日期从今天开始，到第range天后为止，这里设为10天type: Number,value: 10},start_time: {//开始时间，设为整点type: Number,value: 8},step: {//预约时间的步长，设置为30，表示30分钟type: Number},end_time: {//结束时间，设为整点type: Number,value: 22}},/*** 组件的初始数据*/data: {isShow: false,selectDate: "",dialogh: 0,//日期列表和时间列表date_list: [],time_list: []},attached: function () {let start_day = this.ts_string(new Date().getTime());console.log(start_day); //-08-31console.log(new Date());let end_day = this.ts_string(new Date().setDate(new Date().getDate() + this.properties.range))//获取日期列表let date_list = this.getDiffDate(start_day, end_day);//获取时间列表let time_list = this.getTimeList(this.properties.start_time, this.properties.end_time, this.properties.step);console.log(time_list);this.setData({// date_time: [date_column, time_column],date_list: date_list,time_list: time_list,})//动画this.animation = wx.createAnimation({duration: 300})//500rpx转成pxlet dialoghpx = 800 / 750 * wx.getSystemInfoSync().windowWidththis.setData({dialogh: dialoghpx,selectDate: this.data.date_list[0] + this.data.time_list[0]})},methods: {getDiffDate(start, end) {let startTime = new Date(start);let endTime = new Date(end);let dateArr = [];while ((endTime.getTime() - startTime.getTime()) >= 0) {dateArr.push(this.ts_string(startTime.getTime()));startTime.setDate(startTime.getDate() + 1);}return dateArr;},zfill(num, length) {return (Array(length).join('0') + num).slice(-length);},//把日期转换成xxxx-xx-xx的形式ts_string(timestamp) {let d = new Date(timestamp);let day = "";switch (d.getDay()) {case 1:day = "周一";break;case 2:day = "周二";break;case 3:day = "周三";break;case 4:day = "周四";break;case 5:day = "周五";break;case 6:day = "周六";break;case 0:day = "周日";break;}let string = (d.getFullYear()) + "-" +this.zfill((d.getMonth() + 1), 2) + "-" +this.zfill((d.getDate()), 2) + " (" + day + ")"return string},//获取时间区间列表，输入(起始时间，结束时间，步长)getTimeList(start, end, step) {let start_time = new Date();//设置起始时间start_time.setHours(start, 0, 0);console.log(start_time);//设置结束时间let end_time = new Date();end_time.setHours(end, 0, 0);let startG = start_time.getTime(); //起始时间的格林时间let endG = end_time.getTime(); //起始时间的格林时间let step_ms = step * 60 * 1000;let timeArr = [];while (startG < endG) {let time = this.timeAdd(startG, step_ms);timeArr.push(time);startG += step_ms;}return timeArr;},timeAdd(time1, add) {var nd = new Date(time1); //创建时间对象//获取起始时间的时分秒var hh1 = nd.getHours();var mm1 = nd.getMinutes();if (hh1 <= 9) hh1 = "0" + hh1;if (mm1 <= 9) mm1 = "0" + mm1;nd = nd.valueOf(); //转换为毫秒数nd = nd + Number(add);nd = new Date(nd);var hh2 = nd.getHours();var mm2 = nd.getMinutes();if (hh2 <= 9) hh2 = "0" + hh2;if (mm2 <= 9) mm2 = "0" + mm2;var time = hh1 + ":" + mm1 + "-" + hh2 + ":" + mm2;return time; //时间段},change: function (e) {const val = e.detail.value;//val[0]表示选择的第一列序号，val[1]表示选择的第二列序号let select = this.data.date_list[val[0]] + this.data.time_list[val[1]]console.log(select);this.setData({selectDate: select})},showDialog() {this.setData({isShow: true})//先向下移动dialog高度，然后恢复原位从而形成从下向上弹出效果this.animation.translateY(this.data.dialogh).translateY(0).step()this.setData({animation: this.animation.export()})},dimsss() {//从原位向下移动dailog高度，形成从上向下的收起效果this.animation.translateY(this.data.dialogh).step()this.setData({animation: this.animation.export()})//动画结束后蒙层消失setTimeout(() => {this.setData({isShow: false})}, 300)},cancel() {this.triggerEvent("cancel")this.dimsss()},confirm() {this.triggerEvent("confirm", {selectDate: this.data.selectDate})this.dimsss()}}})
组件的使用
想在父组件中使用封装好的date-picker组件，先要在父组件的json文件中声明。
{"usingComponents": {"date-picker": "../../components/date-picker/date-picker"},}
如果想实现简单的选择时间段并在页面中显示的功能，父组件代码如下编写即可。
父组件wxml文件：
<view class="option" bindtap="timeOpen" style="font-size: 16px;">{{selectDate}}</view><date-picker id="picker" range="8" step="40" bindconfirm="confirm"></date-picker>
父组件js文件：
Page({data: {selectDate: "",machineShow: false,},onLoad: function () {this.picker = this.selectComponent("#picker")},timeOpen() {this.picker.showDialog();},confirm(e) {this.setData({selectDate: e.detail.selectDate})},})
2.结合vant weapp的date-picker
自定义的date-picker组件已经可以实现想实现的功能，但自定义的组件样式不够美观。这时，我注意到了小程序可以使用vant的组件库，组件库多列选择器的样式可以自由修改，而且自带样式已经足够美观，所以下面考虑结合vant组件库实现date-picker。
实现效果
具体实现
使用vant weapp的picker组件和popup组件可以更简洁地实现想要的效果，打造自定义的date-picker组件。
首先需要在编写组件的json文件中导入vant weapp的相应组件
{"component": true,"usingComponents": {"van-picker": "@vant/weapp/picker/index","van-popup": "@vant/weapp/popup/index"}}
然后编写date-picker的wxml文件：
<van-popup round show="{{ isShow }}" bind:close="cancel" position="bottom" custom-style="height: 55%"><van-picker show-toolbar columns="{{ date_time_list }}" bind:cancel="cancel" bind:change="change"bind:confirm="confirm" /></van-popup>
因为van-picker的参数columns接受的是一个对象数组，与picker-view有一定差异，所以需要将date-picker的js文件进行如下更改。
1.修改data，增加date_time_list
data: {isShow: false,selectDate: "",dialogh: 0,//日期列表和时间列表date_list: [],time_list: [],date_time_list: [] //增加的字段},
2.修改attached函数
//增加的内容let date_time_list = [{values: date_list},{values: time_list }];this.setData({date_list: date_list,time_list: time_list,date_time_list: date_time_list //增加的内容})
3.修改change函数
change: function (e) {let val = e.detail.value;let select = val[0] + val[1];this.setData({selectDate: select})},
