本文实例分享了javascript制作微信聊天面板的相关代码，具体内容如下
点击头像更换说话对象，简单说下实现原理，html中创建一个ul用于存放所有说话的内容，对话内容是有javascript 动态生成，
主要难点：先布局好css，当时奥巴马发送时候，让这个li有浮动，当是小胖时候，让这个li左浮动。
代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>模拟短信发送</title>
<style>
* {
margin: 0;
padding: 0;
list-style: none;
font-family: '微软雅黑'
}
#container {
width: 450px;
height: 780px;
background: #eee;
margin: 80px auto 0;
position: relative;
box-shadow: 20px 20px 55px #777;
}
.header {
background: #000;
height: 34px;
color: #fff;
line-height: 34px;
font-size: 20px;
padding: 0 10px;
}
.footer {
width: 430px;
height: 50px;
background: #666;
position: absolute;
bottom: 0;
padding: 10px;
}
.footer input {
width: 275px;
height: 45px;
outline: none;
font-size: 20px;
text-indent: 10px;
position: absolute;
border-radius: 6px;
right: 80px;
}
.footer span {
display: inline-block;
width: 62px;
height: 48px;
background: #ccc;
font-weight: 900;
line-height: 45px;
cursor: pointer;
text-align: center;
position: absolute;
right: 10px;
border-radius: 6px;
}
.footer span:hover {
color: #fff;
background: #999;
}
#icon {
display: inline-block;
background: red;
width: 60px;
height: 60px;
border-radius: 30px;
position: absolute;
bottom: 6px;
left: 14px;
cursor: pointer;
overflow: hidden;
}
img {
width: 60px;
height: 60px;
}
.content {
font-size: 20px;
width: 435px;
height: 662px;
overflow: auto;
padding: 5px;
}
.content li {
margin-top: 10px;
padding-left: 10px;
width: 412px;
display: block;
clear: both;
overflow: hidden;
}
.content li img {
float: left;
}
.content li span{
background: #7cfc00;
padding: 10px;
border-radius: 10px;
float: left;
margin: 6px 10px 0 10px;
max-width: 310px;
border: 1px solid #ccc;
box-shadow: 0 0 3px #ccc;
}
.content li img.imgleft {
float: left;
}
.content li img.imgright {
float: right;
}
.content li span.spanleft {
float: left;
background: #fff;
}
.content li span.spanright {
float: right;
background: #7cfc00;
}
</style>
<script>
window.onload = function(){
var arrIcon = ['img/1.jpg','img/2.jpg'];
var num = 0; //控制头像改变
var iNow = -1; //用来累加改变左右浮动
var icon = document.getElementById('icon').getElementsByTagName('img');
var btn = document.getElementById('btn');
var text = document.getElementById('text');
var content = document.getElementsByTagName('ul')[0];
var img = content.getElementsByTagName('img');
var span = content.getElementsByTagName('span');
icon[0].onclick = function(){
if(num==0){
this.src = arrIcon[1];
num = 1;
}else if(num==1){
this.src = arrIcon[0];
num = 0;
}
}
btn.onclick = function(){
if(text.value ==''){
alert('发送内容不能为空');
}else {
content.innerHTML += '<li><img src="'+arrIcon[num]+'"><span>'+text.value+'</span></li>';
iNow++;
if(num==0){
img[iNow].className += 'imgright';
span[iNow].className += 'spanright';
}else {
img[iNow].className += 'imgleft';
span[iNow].className += 'spanleft';
}
text.value = '';
}
}
}
</script>
</head>
<body>
<div id="container">
<div class="header">
<span style="float: left;">白超华-博客园</span>
<span style="float: right;">20:30</span>
</div>
<ul class="content"></ul>
<div class="footer">
<div id="icon">
<img src="img/1.jpg" alt="">
</div>
<input id="text" type="text" placeholder="说点什么吧...">
<span id="btn">发送</span>
</div>
</div>
</body>
</html>
希望本文所述对大家学习javascript程序设计有所帮助。
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