前言
小程序内通过静态模板和样式绘制 canvas ，导出图片，可用于生成分享图等场景
一、效果预览
点击生成海报
这个是生成的保存到相册的图片
二、使用步骤
1.安装引入wxml-to-canvas
Step1.运行小程序npm安装命令
npm install --save wxml-to-canvasStep2.JSON 组件声明
{
"usingComponents": {
"wxml-to-canvas": "wxml-to-canvas",
}
}文章最后会有wxml-to-canvas的其它详细教程
2.创建js
创建的js放到页面文件夹即可
代码如下（demo.js）：
var calendar = require('../../../utils/calendar');
var d=new Date();
let Year = d.getFullYear();
let Month = (d.getMonth()+1).toString().padStart(2,'0');
let Day = (d.getDate()).toString().padStart(2,'0');
let time = Month+ '/' + Day;
let xq = "星期"+"天一二三四五六".charAt(d.getDay());
const wxml = (hb_describe,hb_bg,hb_wx2code)=>{
return `
<view class="container" >
<view class="itembox1">
<text class="time">`+time+`</text>
<view class="xqview">
<text class="xq">`+xq+`</text>
<text class="xq2">`+calendar.default.solar2lunar(Year,Month,Day).gzYear+'年'+calendar.default.solar2lunar(Year,Month,Day).IMonthCn+calendar.default.solar2lunar(Year,Month,Day).IDayCn+`</text>
</view>
</view>
<view class="itembox2">
<image class="img" mode="aspectFit" src="`+hb_bg+`"></image>
</view>
<view class="itembox3">
<text class="text">`+hb_describe+`</text>
<image class="imgcode" src="`+hb_wx2code+`"></image>
</view>
</view>
`
}
let width=wx.getSystemInfoSync().windowWidth*0.8;
let widthCenter=width*0.9;
let width6=widthCenter*0.6;//描述占60%
let width4=widthCenter*0.4;
const style = {
container: {
width: width,
height: 450,
flexDirection: 'column',
backgroundColor: '#FFFFFF',
alignItems: 'center'
},
itembox1: {
width: widthCenter,
height: 130
},
itembox2: {
width: widthCenter,
height: 200
},
itembox3: {
width: widthCenter,
height: 120,
flexDirection: 'row',
justifyContent:'space-around',
alignItems: 'center',
//paddingTop:20,
//paddingBottom:20
},
time:{
fontSize:88,
color:'#0222AC',
textAlign:'center',
fontStyle:'italic'
},
xqview:{
fontSize:16,
color:'#0222AC',
marginTop:106
},
xq:{
textAlign:'left'
},
xq2:{
textAlign:'right'
},
img: {
width: widthCenter,
minHeight: 190,
maxHeight: 200,
},
imgcode: {
width: 80,
height: 80
},
text: {
width: width6,
height: 60,
textAlign: 'center',
verticalAlign: 'middle'
}
}
module.exports = {
wxml,
style
}3.小程序页面
wxml:
<!-- 海报 -->
<view class="hbbox" wx:if="{{maskHidden}}">
<wxml-to-canvas class="widget" height='{{canvasH}}'></wxml-to-canvas>
</view>
<view class="padding-sm margin-top flex flex-direction renderToCanvas" wx:if="{{hexiao}}">
<button bindtap="renderToCanvas" class="cu-btn">活动打卡</button>
</view>
<view class='hbmask' hidden="{{maskHidden == false}}">
<button class='hbbaocun' hidden="{{maskHidden == false}}" bindtap='extraImage'>保存相册</button>
</view>
<!-- 海报end -->js:\
博主这里是打开一个弹窗 在弹窗里展示生成海报，js代码全部放出来，可自行取用。
const {
wxml,
style
} = require('./demo.js')
Page({
data: {
//海报
hb_wx2code: "",
hb_bg: "",
hb_describe: '',
maskHidden: false,
canvasH: 0,
number:0,
flag:''
},
//生成海报
makeHB(){
let that = this;
that.setData({
maskHidden: true,
canvasH:570
})
setTimeout(()=>{
const _wxml = wxml(that.data.hb_describe,that.data.hb_bg,that.data.hb_wx2code)
wx.nextTick(()=>{
that.widget = that.selectComponent('.widget')
const p1 = that.selectComponent('.widget').renderToCanvas({ wxml:_wxml , style })
p1.then((res) => {
wx.hideToast();
that.container = res;
}).catch(err=>{
})
})
},500)
},
renderToCanvas() {
let that = this;
if(that.data.hb_wx2code){
wx.showToast({
title: '海报生成中...',
icon: 'loading',
duration: 1000
});
that.makeHB();
}
else{
wx.showToast({
title: '海报生成中...',
icon: 'loading',
duration: 1000
});
const data={
open_id : wx.getStorageSync('openId'),
type: '2',
video_id:that.data.id
}
mycomm.ajaxDataGet("/inviteFriends/ordinary", data, function (res) {
that.setData({
hb_wx2code: res.val.qr_code,
hb_bg:res.val.background_img,
hb_describe:res.val.describe
});
that.makeHB();
}, true);
}
},
extraImage() {
const p2 = this.widget.canvasToTempFilePath()
p2.then(res => {
// this.setData({
// src: res.tempFilePath,
// width: this.container.layoutBox.width,
// height: this.container.layoutBox.height
// })
this.baocun(res.tempFilePath);
})
},
//点击保存到相册
baocun: function (imagePath) {
var that = this
wx.saveImageToPhotosAlbum({
filePath: imagePath,
success(res) {
wx.showModal({
content: '海报已保存到相册',
showCancel: false,
confirmText: '确定',
confirmColor: '#333',
success: function (res) {
if (res.confirm) {
/* 该隐藏的隐藏 */
that.setData({
maskHidden: false
})
}
},
fail: function (res) {}
})
}
})
},
})4.农历日期js
这个是海报上根据当前日期对应的农历日期，不需要可以自行删除掉。
var calendar = {
/**
* 农历1900-2100的润大小信息表
* @Array Of Property
* @return Hex
*/
lunarInfo:[0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,//1900-1909
0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,//1910-1919
0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,//1920-1929
0x06566,0x0d4a0,0x0ea50,0x16a95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,//1930-1939
0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,//1940-1949
0x06ca0,0x0b550,0x15355,0x04da0,0x0a5b0,0x14573,0x052b0,0x0a9a8,0x0e950,0x06aa0,//1950-1959
0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,//1960-1969
0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b6a0,0x195a6,//1970-1979
0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,//1980-1989
0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x05ac0,0x0ab60,0x096d5,0x092e0,//1990-1999
0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,//2000-2009
0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,//2010-2019
0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,//2020-2029
0x05aa0,0x076a3,0x096d0,0x04afb,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,//2030-2039
0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0,//2040-2049
/**Add By JJonline@JJonline.Cn**/
0x14b63,0x09370,0x049f8,0x04970,0x064b0,0x168a6,0x0ea50, 0x06b20,0x1a6c4,0x0aae0,//2050-2059
0x092e0,0x0d2e3,0x0c960,0x0d557,0x0d4a0,0x0da50,0x05d55,0x056a0,0x0a6d0,0x055d4,//2060-2069
0x052d0,0x0a9b8,0x0a950,0x0b4a0,0x0b6a6,0x0ad50,0x055a0,0x0aba4,0x0a5b0,0x052b0,//2070-2079
0x0b273,0x06930,0x07337,0x06aa0,0x0ad50,0x14b55,0x04b60,0x0a570,0x054e4,0x0d160,//2080-2089
0x0e968,0x0d520,0x0daa0,0x16aa6,0x056d0,0x04ae0,0x0a9d4,0x0a2d0,0x0d150,0x0f252,//2090-2099
0x0d520],//2100
/**
* 公历每个月份的天数普通表
* @Array Of Property
* @return Number
*/
solarMonth:[31,28,31,30,31,30,31,31,30,31,30,31],
/**
* 天干地支之天干速查表
* @Array Of Property trans["甲","乙","丙","丁","戊","己","庚","辛","壬","癸"]
* @return Cn string
*/
Gan:["\u7532","\u4e59","\u4e19","\u4e01","\u620a","\u5df1","\u5e9a","\u8f9b","\u58ec","\u7678"],
/**
* 天干地支之地支速查表
* @Array Of Property
* @trans["子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"]
* @return Cn string
*/
Zhi:["\u5b50","\u4e11","\u5bc5","\u536f","\u8fb0","\u5df3","\u5348","\u672a","\u7533","\u9149","\u620c","\u4ea5"],
/**
* 天干地支之地支速查表<=>生肖
* @Array Of Property
* @trans["鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"]
* @return Cn string
*/
Animals:["\u9f20","\u725b","\u864e","\u5154","\u9f99","\u86c7","\u9a6c","\u7f8a","\u7334","\u9e21","\u72d7","\u732a"],
/**
* 阳历节日
*/
festival: {
'1-1': {title: '元旦节'},
'2-14': {title: '情人节'},
'5-1': {title: '劳动节'},
'5-4': {title: '青年节'},
'6-1': {title: '儿童节'},
'9-10': {title: '教师节'},
'10-1': {title: '国庆节'},
'12-25': {title: '圣诞节'},
'3-8': {title: '妇女节'},
'3-12': {title: '植树节'},
'4-1': {title: '愚人节'},
'5-12': {title: '护士节'},
'7-1': {title: '建党节'},
'8-1': {title: '建军节'},
'12-24': {title: '平安夜'},
},
/**
* 农历节日
*/
lfestival: {
'12-30': {title: '除夕'},
'1-1': {title: '春节'},
'1-15': {title: '元宵节'},
'5-5': {title: '端午节'},
'8-15': {title: '中秋节'},
'9-9': {title: '重阳节'},
},
/**
* 返回默认定义的阳历节日
*/
getFestival(){
return this.festival
},
/**
* 返回默认定义的内容里节日
*/
getLunarFestival(){
return this.lfestival
},
/**
*
* @param {Object} 按照festival的格式输入数据，设置阳历节日
*/
setFestival(param={}){
this.festival = param
},
/**
*
* @param {Object} 按照lfestival的格式输入数据，设置农历节日
*/
setLunarFestival(param={}){
this.lfestival = param
},
/**
* 24节气速查表
* @Array Of Property
* @trans["小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至"]
* @return Cn string
*/
solarTerm:["\u5c0f\u5bd2","\u5927\u5bd2","\u7acb\u6625","\u96e8\u6c34","\u60ca\u86f0","\u6625\u5206","\u6e05\u660e","\u8c37\u96e8","\u7acb\u590f","\u5c0f\u6ee1","\u8292\u79cd","\u590f\u81f3","\u5c0f\u6691","\u5927\u6691","\u7acb\u79cb","\u5904\u6691","\u767d\u9732","\u79cb\u5206","\u5bd2\u9732","\u971c\u964d","\u7acb\u51ac","\u5c0f\u96ea","\u5927\u96ea","\u51ac\u81f3"],
/**
* 1900-2100各年的24节气日期速查表
* @Array Of Property
* @return 0x string For splice
*/
sTermInfo:['9778397bd097c36b0b6fc9274c91aa','97b6b97bd19801ec9210c965cc920e','97bcf97c3598082c95f8c965cc920f',
'97bd0b06bdb0722c965ce1cfcc920f','b027097bd097c36b0b6fc9274c91aa','97b6b97bd19801ec9210c965cc920e',
'97bcf97c359801ec95f8c965cc920f','97bd0b06bdb0722c965ce1cfcc920f','b027097bd097c36b0b6fc9274c91aa',
'97b6b97bd19801ec9210c965cc920e','97bcf97c359801ec95f8c965cc920f','97bd0b06bdb0722c965ce1cfcc920f',
'b027097bd097c36b0b6fc9274c91aa','9778397bd19801ec9210c965cc920e','97b6b97bd19801ec95f8c965cc920f',
'97bd09801d98082c95f8e1cfcc920f','97bd097bd097c36b0b6fc9210c8dc2','9778397bd197c36c9210c9274c91aa',
'97b6b97bd19801ec95f8c965cc920e','97bd09801d98082c95f8e1cfcc920f','97bd097bd097c36b0b6fc9210c8dc2',
'9778397bd097c36c9210c9274c91aa','97b6b97bd19801ec95f8c965cc920e','97bcf97c3598082c95f8e1cfcc920f',
'97bd097bd097c36b0b6fc9210c8dc2','9778397bd097c36c9210c9274c91aa','97b6b97bd19801ec9210c965cc920e',
'97bcf97c3598082c95f8c965cc920f','97bd097bd097c35b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa',
'97b6b97bd19801ec9210c965cc920e','97bcf97c3598082c95f8c965cc920f','97bd097bd097c35b0b6fc920fb0722',
'9778397bd097c36b0b6fc9274c91aa','97b6b97bd19801ec9210c965cc920e','97bcf97c359801ec95f8c965cc920f',
'97bd097bd097c35b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa','97b6b97bd19801ec9210c965cc920e',
'97bcf97c359801ec95f8c965cc920f','97bd097bd097c35b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa',
'97b6b97bd19801ec9210c965cc920e','97bcf97c359801ec95f8c965cc920f','97bd097bd07f595b0b6fc920fb0722',
'9778397bd097c36b0b6fc9210c8dc2','9778397bd19801ec9210c9274c920e','97b6b97bd19801ec95f8c965cc920f',
'97bd07f5307f595b0b0bc920fb0722','7f0e397bd097c36b0b6fc9210c8dc2','9778397bd097c36c9210c9274c920e',
'97b6b97bd19801ec95f8c965cc920f','97bd07f5307f595b0b0bc920fb0722','7f0e397bd097c36b0b6fc9210c8dc2',
'9778397bd097c36c9210c9274c91aa','97b6b97bd19801ec9210c965cc920e','97bd07f1487f595b0b0bc920fb0722',
'7f0e397bd097c36b0b6fc9210c8dc2','9778397bd097c36b0b6fc9274c91aa','97b6b97bd19801ec9210c965cc920e',
'97bcf7f1487f595b0b0bb0b6fb0722','7f0e397bd097c35b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa',
'97b6b97bd19801ec9210c965cc920e','97bcf7f1487f595b0b0bb0b6fb0722','7f0e397bd097c35b0b6fc920fb0722',
'9778397bd097c36b0b6fc9274c91aa','97b6b97bd19801ec9210c965cc920e','97bcf7f1487f531b0b0bb0b6fb0722',
'7f0e397bd097c35b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa','97b6b97bd19801ec9210c965cc920e',
'97bcf7f1487f531b0b0bb0b6fb0722','7f0e397bd07f595b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa',
'97b6b97bd19801ec9210c9274c920e','97bcf7f0e47f531b0b0bb0b6fb0722','7f0e397bd07f595b0b0bc920fb0722',
'9778397bd097c36b0b6fc9210c91aa','97b6b97bd197c36c9210c9274c920e','97bcf7f0e47f531b0b0bb0b6fb0722',
'7f0e397bd07f595b0b0bc920fb0722','9778397bd097c36b0b6fc9210c8dc2','9778397bd097c36c9210c9274c920e',
'97b6b7f0e47f531b0723b0b6fb0722','7f0e37f5307f595b0b0bc920fb0722','7f0e397bd097c36b0b6fc9210c8dc2',
'9778397bd097c36b0b70c9274c91aa','97b6b7f0e47f531b0723b0b6fb0721','7f0e37f1487f595b0b0bb0b6fb0722',
'7f0e397bd097c35b0b6fc9210c8dc2','9778397bd097c36b0b6fc9274c91aa','97b6b7f0e47f531b0723b0b6fb0721',
'7f0e27f1487f595b0b0bb0b6fb0722','7f0e397bd097c35b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa',
'97b6b7f0e47f531b0723b0b6fb0721','7f0e27f1487f531b0b0bb0b6fb0722','7f0e397bd097c35b0b6fc920fb0722',
'9778397bd097c36b0b6fc9274c91aa','97b6b7f0e47f531b0723b0b6fb0721','7f0e27f1487f531b0b0bb0b6fb0722',
'7f0e397bd097c35b0b6fc920fb0722','9778397bd097c36b0b6fc9274c91aa','97b6b7f0e47f531b0723b0b6fb0721',
'7f0e27f1487f531b0b0bb0b6fb0722','7f0e397bd07f595b0b0bc920fb0722','9778397bd097c36b0b6fc9274c91aa',
'97b6b7f0e47f531b0723b0787b0721','7f0e27f0e47f531b0b0bb0b6fb0722','7f0e397bd07f595b0b0bc920fb0722',
'9778397bd097c36b0b6fc9210c91aa','97b6b7f0e47f149b0723b0787b0721','7f0e27f0e47f531b0723b0b6fb0722',
'7f0e397bd07f595b0b0bc920fb0722','9778397bd097c36b0b6fc9210c8dc2','977837f0e37f149b0723b0787b0721',
'7f07e7f0e47f531b0723b0b6fb0722','7f0e37f5307f595b0b0bc920fb0722','7f0e397bd097c35b0b6fc9210c8dc2',
'977837f0e37f14998082b0787b0721','7f07e7f0e47f531b0723b0b6fb0721','7f0e37f1487f595b0b0bb0b6fb0722',
'7f0e397bd097c35b0b6fc9210c8dc2','977837f0e37f14998082b0787b06bd','7f07e7f0e47f531b0723b0b6fb0721',
'7f0e27f1487f531b0b0bb0b6fb0722','7f0e397bd097c35b0b6fc920fb0722','977837f0e37f14998082b0787b06bd',
'7f07e7f0e47f531b0723b0b6fb0721','7f0e27f1487f531b0b0bb0b6fb0722','7f0e397bd097c35b0b6fc920fb0722',
'977837f0e37f14998082b0787b06bd','7f07e7f0e47f531b0723b0b6fb0721','7f0e27f1487f531b0b0bb0b6fb0722',
'7f0e397bd07f595b0b0bc920fb0722','977837f0e37f14998082b0787b06bd','7f07e7f0e47f531b0723b0b6fb0721',
'7f0e27f1487f531b0b0bb0b6fb0722','7f0e397bd07f595b0b0bc920fb0722','977837f0e37f14998082b0787b06bd',
'7f07e7f0e47f149b0723b0787b0721','7f0e27f0e47f531b0b0bb0b6fb0722','7f0e397bd07f595b0b0bc920fb0722',
'977837f0e37f14998082b0723b06bd','7f07e7f0e37f149b0723b0787b0721','7f0e27f0e47f531b0723b0b6fb0722',
'7f0e397bd07f595b0b0bc920fb0722','977837f0e37f14898082b0723b02d5','7ec967f0e37f14998082b0787b0721',
'7f07e7f0e47f531b0723b0b6fb0722','7f0e37f1487f595b0b0bb0b6fb0722','7f0e37f0e37f14898082b0723b02d5',
'7ec967f0e37f14998082b0787b0721','7f07e7f0e47f531b0723b0b6fb0722','7f0e37f1487f531b0b0bb0b6fb0722',
'7f0e37f0e37f14898082b0723b02d5','7ec967f0e37f14998082b0787b06bd','7f07e7f0e47f531b0723b0b6fb0721',
'7f0e37f1487f531b0b0bb0b6fb0722','7f0e37f0e37f14898082b072297c35','7ec967f0e37f14998082b0787b06bd',
'7f07e7f0e47f531b0723b0b6fb0721','7f0e27f1487f531b0b0bb0b6fb0722','7f0e37f0e37f14898082b072297c35',
'7ec967f0e37f14998082b0787b06bd','7f07e7f0e47f531b0723b0b6fb0721','7f0e27f1487f531b0b0bb0b6fb0722',
'7f0e37f0e366aa89801eb072297c35','7ec967f0e37f14998082b0787b06bd','7f07e7f0e47f149b0723b0787b0721',
'7f0e27f1487f531b0b0bb0b6fb0722','7f0e37f0e366aa89801eb072297c35','7ec967f0e37f14998082b0723b06bd',
'7f07e7f0e47f149b0723b0787b0721','7f0e27f0e47f531b0723b0b6fb0722','7f0e37f0e366aa89801eb072297c35',
'7ec967f0e37f14998082b0723b06bd','7f07e7f0e37f14998083b0787b0721','7f0e27f0e47f531b0723b0b6fb0722',
'7f0e37f0e366aa89801eb072297c35','7ec967f0e37f14898082b0723b02d5','7f07e7f0e37f14998082b0787b0721',
'7f07e7f0e47f531b0723b0b6fb0722','7f0e36665b66aa89801e9808297c35','665f67f0e37f14898082b0723b02d5',
'7ec967f0e37f14998082b0787b0721','7f07e7f0e47f531b0723b0b6fb0722','7f0e36665b66a449801e9808297c35',
'665f67f0e37f14898082b0723b02d5','7ec967f0e37f14998082b0787b06bd','7f07e7f0e47f531b0723b0b6fb0721',
'7f0e36665b66a449801e9808297c35','665f67f0e37f14898082b072297c35','7ec967f0e37f14998082b0787b06bd',
'7f07e7f0e47f531b0723b0b6fb0721','7f0e26665b66a449801e9808297c35','665f67f0e37f1489801eb072297c35',
'7ec967f0e37f14998082b0787b06bd','7f07e7f0e47f531b0723b0b6fb0721','7f0e27f1487f531b0b0bb0b6fb0722'],
/**
* 数字转中文速查表
* @Array Of Property
* @trans ['日','一','二','三','四','五','六','七','八','九','十']
* @return Cn string
*/
nStr1:["\u65e5","\u4e00","\u4e8c","\u4e09","\u56db","\u4e94","\u516d","\u4e03","\u516b","\u4e5d","\u5341"],
/**
* 日期转农历称呼速查表
* @Array Of Property
* @trans ['初','十','廿','卅']
* @return Cn string
*/
nStr2:["\u521d","\u5341","\u5eff","\u5345"],
/**
* 月份转农历称呼速查表
* @Array Of Property
* @trans ['正','一','二','三','四','五','六','七','八','九','十','冬','腊']
* @return Cn string
*/
nStr3:["\u6b63","\u4e8c","\u4e09","\u56db","\u4e94","\u516d","\u4e03","\u516b","\u4e5d","\u5341","\u51ac","\u814a"],
/**
* 农历年份数字称呼速查表
* @Array Of Property
* @trans ['零','一','二','三','四','五','六','七','八','九','十']
* @return Cn string
*/
nStr4:["\u96f6","\u4e00","\u4e8c","\u4e09","\u56db","\u4e94","\u516d","\u4e03","\u516b","\u4e5d","\u5341"],
/**
* 返回农历y年一整年的总天数
* @param lunar Year
* @return Number
* @eg:var count = calendar.lYearDays(1987) ;//count=387
*/
lYearDays:function(y) {
var i, sum = 348;
for(i=0x8000; i>0x8; i>>=1) { sum += (this.lunarInfo[y-1900] & i)? 1: 0; }
return(sum+this.leapDays(y));
},
/**
* 返回农历y年闰月是哪个月；若y年没有闰月 则返回0
* @param lunar Year
* @return Number (0-12)
* @eg:var leapMonth = calendar.leapMonth(1987) ;//leapMonth=6
*/
leapMonth:function(y) { //闰字编码 \u95f0
return(this.lunarInfo[y-1900] & 0xf);
},
/**
* 返回农历y年闰月的天数 若该年没有闰月则返回0
* @param lunar Year
* @return Number (0、29、30)
* @eg:var leapMonthDay = calendar.leapDays(1987) ;//leapMonthDay=29
*/
leapDays:function(y) {
if(this.leapMonth(y)) {
return((this.lunarInfo[y-1900] & 0x10000)? 30: 29);
}
return(0);
},
/**
* 返回农历y年m月（非闰月）的总天数，计算m为闰月时的天数请使用leapDays方法
* @param lunar Year
* @return Number (-1、29、30)
* @eg:var MonthDay = calendar.monthDays(1987,9) ;//MonthDay=29
*/
monthDays:function(y,m) {
if(m>12 || m<1) {return -1}//月份参数从1至12，参数错误返回-1
return( (this.lunarInfo[y-1900] & (0x10000>>m))? 30: 29 );
},
/**
* 返回公历(!)y年m月的天数
* @param solar Year
* @return Number (-1、28、29、30、31)
* @eg:var solarMonthDay = calendar.leapDays(1987) ;//solarMonthDay=30
*/
solarDays:function(y,m) {
if(m>12 || m<1) {return -1} //若参数错误 返回-1
var ms = m-1;
if(ms==1) { //2月份的闰平规律测算后确认返回28或29
return(((y%4 == 0) && (y%100 != 0) || (y%400 == 0))? 29: 28);
}else {
return(this.solarMonth[ms]);
}
},
/**
* 农历年份转换为干支纪年
* @param lYear 农历年的年份数
* @return Cn string
*/
toGanZhiYear:function(lYear) {
var ganKey = (lYear - 3) % 10;
var zhiKey = (lYear - 3) % 12;
if(ganKey == 0) ganKey = 10;//如果余数为0则为最后一个天干
if(zhiKey == 0) zhiKey = 12;//如果余数为0则为最后一个地支
return this.Gan[ganKey-1] + this.Zhi[zhiKey-1];
},
/**
* 公历月、日判断所属星座
* @param cMonth [description]
* @param cDay [description]
* @return Cn string
*/
toAstro:function(cMonth,cDay) {
var s = "\u9b54\u7faf\u6c34\u74f6\u53cc\u9c7c\u767d\u7f8a\u91d1\u725b\u53cc\u5b50\u5de8\u87f9\u72ee\u5b50\u5904\u5973\u5929\u79e4\u5929\u874e\u5c04\u624b\u9b54\u7faf";
var arr = [20,19,21,21,21,22,23,23,23,23,22,22];
return s.substr(cMonth*2 - (cDay < arr[cMonth-1] ? 2 : 0),2) + "\u5ea7";//座
},
/**
* 传入offset偏移量返回干支
* @param offset 相对甲子的偏移量
* @return Cn string
*/
toGanZhi:function(offset) {
return this.Gan[offset%10] + this.Zhi[offset%12];
},
/**
* 传入公历(!)y年获得该年第n个节气的公历日期
* @param y公历年(1900-2100)；n二十四节气中的第几个节气(1~24)；从n=1(小寒)算起
* @return day Number
* @eg:var _24 = calendar.getTerm(1987,3) ;//_24=4;意即1987年2月4日立春
*/
getTerm:function(y,n) {
if(y<1900 || y>2100) {return -1;}
if(n<1 || n>24) {return -1;}
var _table = this.sTermInfo[y-1900];
var _info = [
parseInt('0x'+_table.substr(0,5)).toString() ,
parseInt('0x'+_table.substr(5,5)).toString(),
parseInt('0x'+_table.substr(10,5)).toString(),
parseInt('0x'+_table.substr(15,5)).toString(),
parseInt('0x'+_table.substr(20,5)).toString(),
parseInt('0x'+_table.substr(25,5)).toString()
];
var _calday = [
_info[0].substr(0,1),
_info[0].substr(1,2),
_info[0].substr(3,1),
_info[0].substr(4,2),
_info[1].substr(0,1),
_info[1].substr(1,2),
_info[1].substr(3,1),
_info[1].substr(4,2),
_info[2].substr(0,1),
_info[2].substr(1,2),
_info[2].substr(3,1),
_info[2].substr(4,2),
_info[3].substr(0,1),
_info[3].substr(1,2),
_info[3].substr(3,1),
_info[3].substr(4,2),
_info[4].substr(0,1),
_info[4].substr(1,2),
_info[4].substr(3,1),
_info[4].substr(4,2),
_info[5].substr(0,1),
_info[5].substr(1,2),
_info[5].substr(3,1),
_info[5].substr(4,2),
];
return parseInt(_calday[n-1]);
},
/**
* 传入年份返回汉语通俗表示法
* @param {lunar} year
* @return CN {string}
* @eg:let cnYear = calendar.toChinaYear(1960);//cnYear = '一九六零'
*/
toChinaYear:function(y){ //年
let year = y.toString().split("");
return `${this.nStr4[year[0]]}${this.nStr4[year[1]]}${this.nStr4[year[2]]}${this.nStr4[year[3]]}`;
},
/**
* 传入农历数字月份返回汉语通俗表示法
* @param lunar month
* @return Cn string
* @eg:var cnMonth = calendar.toChinaMonth(12) ;//cnMonth='腊月'
*/
toChinaMonth:function(m) { // 月 => \u6708
if(m>12 || m<1) {return -1} //若参数错误 返回-1
var s = this.nStr3[m-1];
s+= "\u6708";//加上月字
return s;
},
/**
* 传入农历日期数字返回汉字表示法
* @param lunar day
* @return Cn string
* @eg:var cnDay = calendar.toChinaDay(21) ;//cnMonth='廿一'
*/
toChinaDay:function(d){ //日 => \u65e5
var s;
switch (d) {
case 10:
s = '\u521d\u5341'; break;
case 20:
s = '\u4e8c\u5341'; break;
break;
case 30:
s = '\u4e09\u5341'; break;
break;
default :
s = this.nStr2[Math.floor(d/10)];
s += this.nStr1[d%10];
}
return(s);
},
/**
* 年份转生肖[!仅能大致转换] => 精确划分生肖分界线是“立春”
* @param y year
* @return Cn string
* @eg:var animal = calendar.getAnimal(1987) ;//animal='兔'
*/
getAnimal: function(y) {
return this.Animals[(y - 4) % 12]
},
/**
* 传入阳历年月日获得详细的公历、农历object信息 <=>JSON
* @param y solar year
* @param m solar month
* @param d solar day
* @return JSON object
* @eg:console.log(calendar.solar2lunar(1987,11,01));
*/
solar2lunar:function (y,m,d) { //参数区间1900.1.31~2100.12.31
y = parseInt(y)
m = parseInt(m)
d = parseInt(d)
//年份限定、上限
if(y<1900 || y>2100) {
return -1;// undefined转换为数字变为NaN
}
//公历传参最下限
if(y==1900&&m==1&&d<31) {
return -1;
}
//未传参 获得当天
if(!y) {
var objDate = new Date();
}else {
var objDate = new Date(y,parseInt(m)-1,d)
}
var i, leap=0, temp=0;
//修正ymd参数
var y = objDate.getFullYear(),
m = objDate.getMonth()+1,
d = objDate.getDate();
var offset = (Date.UTC(objDate.getFullYear(),objDate.getMonth(),objDate.getDate()) - Date.UTC(1900,0,31))/86400000;
for(i=1900; i<2101 && offset>0; i++) {
temp = this.lYearDays(i);
offset -= temp;
}
if(offset<0) {
offset+=temp; i--;
}
//是否今天
var isTodayObj = new Date(),
isToday = false;
if(isTodayObj.getFullYear()==y && isTodayObj.getMonth()+1==m && isTodayObj.getDate()==d) {
isToday = true;
}
//星期几
var nWeek = objDate.getDay(),
cWeek = this.nStr1[nWeek];
//数字表示周几顺应天朝周一开始的惯例
if(nWeek==0) {
nWeek = 7;
}
//农历年
var year = i;
var leap = this.leapMonth(i); //闰哪个月
var isLeap = false;
//效验闰月
for(i=1; i<13 && offset>0; i++) {
//闰月
if(leap>0 && i==(leap+1) && isLeap==false){
--i;
isLeap = true; temp = this.leapDays(year); //计算农历闰月天数
}
else{
temp = this.monthDays(year, i);//计算农历普通月天数
}
//解除闰月
if(isLeap==true && i==(leap+1)) { isLeap = false; }
offset -= temp;
}
// 闰月导致数组下标重叠取反
if(offset==0 && leap>0 && i==leap+1)
{
if(isLeap){
isLeap = false;
}else{
isLeap = true; --i;
}
}
if(offset<0)
{
offset += temp; --i;
}
//农历月
var month = i;
//农历日
var day = offset + 1;
//天干地支处理
var sm = m-1;
var gzY = this.toGanZhiYear(year);
// 当月的两个节气
// bugfix-2017-7-24 11:03:38 use lunar Year Param `y` Not `year`
var firstNode = this.getTerm(y,(m*2-1));//返回当月「节」为几日开始
var secondNode = this.getTerm(y,(m*2));//返回当月「节」为几日开始
// 依据12节气修正干支月
var gzM = this.toGanZhi((y-1900)*12+m+11);
if(d>=firstNode) {
gzM = this.toGanZhi((y-1900)*12+m+12);
}
//传入的日期的节气与否
var isTerm = false;
var Term = null;
if(firstNode==d) {
isTerm = true;
Term = this.solarTerm[m*2-2];
}
if(secondNode==d) {
isTerm = true;
Term = this.solarTerm[m*2-1];
}
//日柱 当月一日与 1900/1/1 相差天数
var dayCyclical = Date.UTC(y,sm,1,0,0,0,0)/86400000+25567+10;
var gzD = this.toGanZhi(dayCyclical+d-1);
//该日期所属的星座
var astro = this.toAstro(m,d);
var solarDate = y+'-'+m+'-'+d
var lunarDate = year+'-'+month+'-'+day
var festival = this.festival
var lfestival = this.lfestival
var festivalDate = m+'-'+d
var lunarFestivalDate = month+'-'+day
return {
date: solarDate,
lunarDate: lunarDate,
festival: festival[festivalDate] ? festival[festivalDate].title : null,
lunarFestival: lfestival[lunarFestivalDate] ? lfestival[lunarFestivalDate].title : null,
'lYear':year,
'lMonth':month,
'lDay':day,
'Animal':this.getAnimal(year),
'IMonthCn':(isLeap?"\u95f0":'')+this.toChinaMonth(month),
'IDayCn':this.toChinaDay(day),
'cYear':y,
'cMonth':m,
'cDay':d,
'gzYear':gzY,
'gzMonth':gzM,
'gzDay':gzD,
'isToday':isToday,
'isLeap':isLeap,
'nWeek':nWeek,
'ncWeek':"\u661f\u671f"+cWeek,
'isTerm':isTerm,
'Term':Term,
'astro':astro
};
},
/**
* 传入农历年月日以及传入的月份是否闰月获得详细的公历、农历object信息 <=>JSON
* @param y lunar year
* @param m lunar month
* @param d lunar day
* @param isLeapMonth lunar month is leap or not.[如果是农历闰月第四个参数赋值true即可]
* @return JSON object
* @eg:console.log(calendar.lunar2solar(1987,9,10));
*/
lunar2solar:function(y,m,d,isLeapMonth) { //参数区间1900.1.31~2100.12.1
y = parseInt(y)
m = parseInt(m)
d = parseInt(d)
var isLeapMonth = !!isLeapMonth;
var leapOffset = 0;
var leapMonth = this.leapMonth(y);
var leapDay = this.leapDays(y);
if(isLeapMonth&&(leapMonth!=m)) {return -1;}//传参要求计算该闰月公历 但该年得出的闰月与传参的月份并不同
if(y==2100&&m==12&&d>1 || y==1900&&m==1&&d<31) {return -1;}//超出了最大极限值
var day = this.monthDays(y,m);
var _day = day;
//bugFix 2016-9-25
//if month is leap, _day use leapDays method
if(isLeapMonth) {
_day = this.leapDays(y,m);
}
if(y < 1900 || y > 2100 || d > _day) {return -1;}//参数合法性效验
//计算农历的时间差
var offset = 0;
for(var i=1900;i<y;i++) {
offset+=this.lYearDays(i);
}
var leap = 0,isAdd= false;
for(var i=1;i<m;i++) {
leap = this.leapMonth(y);
if(!isAdd) {//处理闰月
if(leap<=i && leap>0) {
offset+=this.leapDays(y);isAdd = true;
}
}
offset+=this.monthDays(y,i);
}
//转换闰月农历 需补充该年闰月的前一个月的时差
if(isLeapMonth) {offset+=day;}
//1900年农历正月一日的公历时间为1900年1月30日0时0分0秒(该时间也是本农历的最开始起始点)
var stmap = Date.UTC(1900,1,30,0,0,0);
var calObj = new Date((offset+d-31)*86400000+stmap);
var cY = calObj.getUTCFullYear();
var cM = calObj.getUTCMonth()+1;
var cD = calObj.getUTCDate();
return this.solar2lunar(cY,cM,cD);
}
};
export default calendar附其它：
wxml-to-canvas的使用
- wxml 引入组件
<video class="video" src="{{src}}">
<wxml-to-canvas class="widget"></wxml-to-canvas>
</video>
<image src="{{src}}" style="width: {{width}}px; height: {{height}}px"></image>- js 获取实例
const {wxml, style} = require('./demo.js')
Page({
data: {
src: ''
},
onLoad() {
this.widget = this.selectComponent('.widget')
},
renderToCanvas() {
const p1 = this.widget.renderToCanvas({ wxml, style })
p1.then((res) => {
this.container = res
this.extraImage()
})
},
extraImage() {
const p2 = this.widget.canvasToTempFilePath()
p2.then(res => {
this.setData({
src: res.tempFilePath,
width: this.container.layoutBox.width,
height: this.container.layoutBox.height
})
})
}
})wxml模板支持 view、text、image 三种标签，通过 class 匹配 style 对象中的样式。
样式对象属性值为对应 wxml 标签的 class 驼峰形式。需为每个元素指定 width 和 height 属性，否则会导致布局错误。
存在多个 className 时，位置靠后的优先级更高，子元素会继承父级元素的可继承属性。
元素均为 flex 布局。left/top 等 仅在 absolute 定位下生效。
