自建博客文章链接：http://www.heblogs.cn/articleDetails/60feb582c1e4a0695c1f8634
小程序自带的组件中有日期跟时间的picker，但没有日期+时间picker组件，这个组件不是很难，比较难的地方是要根据不同年份（是否闰年）跟月份决定一个月里有多少天。
１、date-time-picker.wxml文件
<picker mode="multiSelector" value="{
{valueArray}}" range="{
{rangeValues}}" bindcolumnchange="handleColumnChange" bindchange="handleValueChange" bindcancel="handleCancel">
<slot></slot>
</picker>
date-time-picker.js文件，由代码可知，组件对外属性是value接收的是日期字符串（YYYY-MM-DDHH:mm:ss），还有dateValue接收的是一个Date对象，日期修改时触发change事件，把date跟dateString传入事件参数e.detail中
const leftPad0 = function(v, n) {
!v && v = ""// v || v = "" // v = v || " "
let prefix = "";
for (let i = 0; i < n; i++) {
prefix += "0";
}
return (prefix + v).substr(-n);
};
const stringToDate = function(str) {
str = str.replace(/-/g, "/");
return new Date(str);
};
const isLeapYear = function(year) {
if (((year % 4) == 0) && ((year % 100) != 0) || ((year % 400) == 0)) {
return true;
}
return false;
};
const now = new Date();
const years = [];
const beginYear = 1990;
for (var i = beginYear; i <= now.getFullYear(); i++) {
years.push(i + "年");
}
const months = [];
for (var i = 0; i < 12; i++) {
months.push(leftPad0(i + 1, 2) + "月");
}
const days = [];
for (var i = 0; i < 31; i++) {
days.push(leftPad0(i + 1, 2) + "日");
}
const hours = [];
for (var i = 0; i < 24; i++) {
hours.push(leftPad0(i, 2) + "时");
}
const minutes = [];
for (var i = 0; i < 60; i++) {
minutes.push(leftPad0(i, 2) + "分");
}
Component({
/**
* 组件的属性列表
*/
properties: {
value: String,
dateValue: {
type: Date
}
},
/**
* 组件的初始数据
*/
data: {
valueArray: [0, 0, 0, 0, 0],
rangeValues: [
years,
months,
days,
hours,
minutes
],
pickerYear: beginYear,
pickerMonth: 1
},
observers: {
value: function(v) {
this.setData({
valueArray: this._dateToValueArray(stringToDate(v))
})
},
dateValue: function(date) {
this.setData({
valueArray: this._dateToValueArray(date)
})
},
valueArray: function(v) {
this._settMonthDays(v[0] + beginYear, v[1] + 1);
}
},
/**
* 组件的方法列表
*/
methods: {
_dateToValueArray(date) {
return [date.getFullYear() - beginYear, date.getMonth(), date.getDate() - 1, date.getHours(), date.getMinutes()];
},
_settMonthDays(year, month) {
let monthDays = 31;
switch (month) {
case 2:
monthDays = 28;
if (isLeapYear(year)) {
monthDays = 29;
}
break;
case 4:
case 6:
case 9:
case 11:
monthDays = 30;
break;
}
let days = [];
for (let i = 0; i < monthDays; i++) {
days.push(leftPad0(i + 1, 2) + "日");
}
this.setData({
pickerYear: year,
pickerMonth: month,
"rangeValues[2]": days
});
},
handleCancel(e) {
this.setData({
valueArray: this.data.valueArray
})
},
handleColumnChange(e) {
if (e.detail.column > 1) return false;
let year = this.data.pickerYear;
let month = this.data.pickerMonth;
if (e.detail.column == 0) {
year = e.detail.value + beginYear;
} else if (e.detail.column == 1) {
month = e.detail.value + 1;
}
this._settMonthDays(year, month);
},
handleValueChange(e) {
let dateArr = [];
for (let i in e.detail.value) {
let v = this.data.rangeValues[i][e.detail.value[i]];
dateArr.push(v.toString().substr(0, v.length - 1))
}
let dateString = dateArr[0] + "-" + dateArr[1] + "-" + dateArr[2] + " " + dateArr[3] + ":" + dateArr[4] + ":00";
this.triggerEvent('change', {
date: stringToDate(dateString),
dateString
})
}
}
})
//test.json
{
"usingComponents": {
"date-time-picker": "/components/date-time-picker2/date-time-picker"
}
}
//test.wxml
<date-time-picker value="{
{value}}" bind:change="handleChange">时间：{
{
value}}</date-time-picker>
//test.js
Page({
/**
* 页面的初始数据
*/
data: {
value: "2019-11-11 11:11:00"
},
handleChange(e) {
console.log(e)
this.setData({
value: e.detail.dateString
})
}
})
