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老师批语：
获取图片的url地址用到split()方法进行分割
三个功能按钮需要获取当前元素节点的父节点元素‘li’进行操作
前移和后移，需要获取到前一个或后一个节点进行移动
jQuery中的prev()方法对应着原生js的previousElementSibling属性
next()方法对应着--》nextElementSibling
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>使用jQuery使用动态相册管理,2019.05.21示例</title>
<style>
.warp {
width: 360px;
height: auto;
background-color: linen;
border: 3px double grey;
color: #363636;
border-radius: 2%;
box-shadow: 2px 2px 2px #888;
margin: 0 auto;
}
.warp .header {
padding: 15px;
}
.warp .header h2 {
text-align: center;
}
.add {
width: 100px;
height: 30px;
border: none;
cursor: pointer;
background-color: deepskyblue;
color: white;
}
.add:hover {
background-color: orange;
font-size: 1.1rem;
}
.main {
overflow: hidden;
}
.main ul {
padding: 0;
margin: 0;
}
.main ul li {
list-style-type: none;
float: left;
margin-left: 20px;
margin-bottom: 10px;
width: 150px;
height: 200px;
text-align: center;
}
.main ul li button {
margin: 3px;
border: none;
border-radius: 5%;
background-color: deepskyblue;
}
.main ul li button:hover {
background-color: orange;
color: white;
cursor: pointer;
}
</style>
</head>
<body>
<div class="warp">
<div class="header">
<h2>私人相册</h2>
<p>
<label for="img_url">输入图片地址</label>
<input type="file" name="img_url" id="img_url" placeholder="图片地址">
</p>
<p>
图片类型:
<input type="radio" id="rect" name="border" value="0" checked><label for="rect">直角</label>
<input type="radio" id="radius" name="border" value="10%"><label for="radius">圆角</label>
<input type="radio" id="circle" name="border" value="50%"><label for="circle">圆形</label>
</p>
<p>
<label for="shadow">是否添加阴影:</label>
<select name="shadow" id="shadow">
<option value="0" selected>不添加</option>
<option value="1">添加</option>
</select>
</p>
<p><button class="add">添加图片</button></p>
</div>
<div class="main">
<ul></ul>
</div>
</div>
<script src="static/js/jQuery-3.4.1.js"></script>
<script>
$(function(){
//按钮添加事件
$('button.add').on('click',function () {
//1.获取图片基本信息
var imgUrl = $('#img_url').val();
if(imgUrl.length === 0){
alert('请选择一张图片');
$('#img_url').focus();
return false;
}
var imgType = $('input[type="radio"]:checked').val();
var shadow = 'none';
if($(':selected').val() === '1'){
shadow = '2px 2px 2px #888';
}
console.log(shadow);
//转换图片url
var realImgUrl = imgUrl.split('\\')[2];
imgUrl = 'http://yuanyi.cn/0521/static/images/'+realImgUrl;
//console.log(imgUrl);
//2.创建img并添加到一个li中
var img = $('<img>').attr({
src:imgUrl,
width:150,
height:150
}).css({
'border-radius':imgType,
'box-shadow':shadow
});
var before = $('<button></button>').text('前进');
var after = $('<button></button>').text('后移');
var remove = $('<button></button>').text('删除');
//添加到ul中
var container = $('<li>');
container.append(img,before,after,remove);
container.appendTo('ul');
//三个功能按钮
//前移
before.on('click',function () {
var current = $(this).parent();
//console.log(current);
var prev = current.prev();
prev.before(current);
});
//后退
after.on('click',function () {
var current = $(this).parent();
var next = current.next();
next.after(current);
});
//删除
remove.on('click',function () {
return confirm('是否删除') ? $(this).parent().remove() : false;
});
});
});
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例
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