###面向对象的方法实现万年历
实现思路:
1.创建构造函数constructor
```
function Calender(main){
this.currentDate = new Date()
this.main = main;
}
```
2.创建日历对象的prototype方法
```
Calender.prototype = {
constructor: Calender,
//创建主体内容区域
showMain:function(){},
//创建标题头区域
showHeader: function(){},
//创建week标题头
showWeek: function(){},
//创建容纳日期的容器
showDate:function(){},
//封装一个方法,待点击切换月份时,初始化页面
showInit: function(){}
};//对象结束
```
3.实现思路:
``` ==> 创建日历对象的主体内容
showMain:function(){
var $t = this;//将this对象缓存到$t中,this指向Calender对象
$t.main = document.createElement("main")
document.body.appendChild($t.main);
$t.main.style.width = "600px";
$t.main.style.height = "600px";
$t.main.style.backgroundColor = "gray";
$t.main.style.margin = "50px auto";
$t.main.style.borderRadius = '15px'
}
```
``` ==> 创建标题头区域(包含切换按钮/年月)
showHeader: function(){
var $t = this;
//左控制键
var prevSpan = document.createElement('span')
$t.main.appendChild(prevSpan)
prevSpan.innerHTML = '<'
//存放年月信息
var span = document.createElement('span')
$t.main.appendChild(span)
//右控制键
var nextSpan = document.createElement('span')
$t.main.appendChild(nextSpan)
nextSpan.innerHTML = '>'
var allSpan = document.querySelectorAll('span')
var month = $t.currentDate.getMonth() + 1
var year = $t.currentDate.getFullYear()
//设置左边年月信息
span.innerHTML = year + '年' + month + '月'
for(var i = 0; i < allSpan.length; i++) {
var span = allSpan[i]
//设置span的css样式
span.style.display = 'inline-block'
span.style.width = '33.3%';
span.style.height = '100px'
span.style.color = 'white'
span.style.fontSize = '30px'
span.style.textAlign = 'center'
span.style.lineHeight = '100px'
span.id = 'index' + i
//为左右按键添加事件
if(i==0 || i==2) {
span.onclick = function() {
month = $t.currentDate.getMonth()
year = $t.currentDate.getFullYear()
if(this.id == 'index0') {
month--
} else if(this.id == "index2") {
month++
}
//点击完重新设置当前月
$t.currentDate.setMonth(month)
//清空页面
document.body.innerHTML = ''
//重新布局
$t.showInit()
}
}
};
}
```
``` ==> 创建week标题头
showWeek: function(){
var $t = this;
//创建table标签
var table = document.createElement('table')
$t.main.appendChild(table)
table.style.width = '100%'
//往表格里边添加一行
var tr = table.insertRow()
var weeks = ['日','一', '二', '三', '四', '五', '六' ]
for(var i = 0; i < weeks.length; i++) {
//往tr插入列
var td = tr.insertCell()
td.style.height = '50px'
td.style.backgroundColor = 'goldenrod'
td.style.textAlign = 'center'
td.innerHTML = weeks[i]
}
},
```
```==> 创建容纳日期的容器
showDate:function(){
var $t = this;
var table = document.createElement('table')
$t.main.appendChild(table)
table.style.width = '100%'
//创建一个名言标签
var p = document.createElement("p")
$t.main.appendChild(p)
p.innerHTML = "每一天都是新的自己,怎么活,自己决定!"
p.style.fontSize = "24px";
p.style.width = "100%";
p.style.height = "60px";
p.style.lineHeight = "30px"
p.style.textAlign = "center"
p.style.color = "white"
//创建日期容器
for(var i = 0; i < 6; i++) {
//创建6行
var tr = table.insertRow()
for(var k = 0; k < 7; k++) {
//每一行7格
var td = tr.insertCell()
td.style.height = '60px'
td.style.backgroundColor = 'orange'
td.style.textAlign = 'center'
td.style.fontSize = "20px"
var dayIndex = i * 7 + k
//计算每一个格所对应的日期对象
var eachDate = getEveryDate(dayIndex)
//得到每一个日期的号数
td.innerHTML = eachDate.getDate()
//获取当天日期的值,突出显示当天日期
var now = new Date()
var currentDay = now.getDate()
//console.log(currentDay)
if(eachDate.getMonth() == now.getMonth() && eachDate.getDate() ===currentDay)
td.style.backgroundColor = "aquamarine"
//判断当前月和推算出来的日期的月份是否一样,不一样则代表不是当前月的日期,则把日期灰色显示
if(eachDate.getMonth() != $t.currentDate.getMonth()) {
td.style.backgroundColor = 'lightgray'
td.style.color = 'gray'
}
}
}
},
```
``` ==> 封装一个方法,待点击切换月份时,初始化页面
//封装一个方法,待点击切换月份时,初始化页面
showInit: function(){
var $t = this;
$t.showMain()
$t.showHeader()
$t.showWeek()
$t.showDate()
}
```
``` ==> 对象实例化和初始化页面
//实例化一个Calender对象
var calender = new Calender()
calender.showInit()//初始化页面
```
源代码地址:github地址==》https://github.com/Hasyou99/Calender