Blogger Information
Blog 35
fans 0
comment 0
visits 22448
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
JavaScript基础知识(在线相册)--2018年10月8日17:32:38
Hi的博客
Original
568 people have browsed it

在页面中使用js进行动态的插入涉及到较多的知识点,

以下是我的代码演示

实例

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>相册管理</title>
    <style>
        .warp {
            width: 360px;
            height: auto;
            background-color: #efefef;
            border: 3px double grey;
            color: #363636;
            border-radius: 2%;
        }
        .warp .header {
            padding: 15px;
        }
        .warp .header h2 {
            text-align: center;
        }
        .add {
            width: 100px;
            height: 30px;
            border: none;
            cursor: pointer;
            background-color: skyblue;
            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: lightgreen;
        }
        .main ul li button:hover {
            background-color: orange;
            color: white;
            cursor: pointer;
        }

    </style>
</head>
<body>
<div class="warp">
    <div class="header">
        <h2>江湖女侠排行榜</h2>
        <p>
            <lable for="img_url">输入图片地址</lable>
            <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"><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>是否添加阴影:
            <select name="shadow">
                <option value="0">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="../lib/jquery.js"></script>
<script>
    //分三步完成:

    $(function(){

        $('button.add').on('click',function(){
            //1. 获取图片的相关信息
            // 判断用户是否选择了图片?
            let img_url = $('#img_url').val();
            if (img_url.length === 0) {
                alert('请选择一张图片');
                $('#img_url').focus();
                return false;
            }

            //获取图片的基本特征
            //获取到图片的外观
            let img_type = $(':radio:checked').val();
            //是否添加阴影?
            let shadow = 'none';
            if ($(':selected').val() === '1') {
                shadow = '3px 3px 3px #666';
            }

            //2. 创建图片并添加到页面中仅限本地测试
            img_url = 'http://te.com/0918/images/'+img_url.split('\\')[2];


            //创建一个图片
            let img = $('<img>')
                .prop('src',img_url)
                .width(150)
                .height(150)
                .css({  // 给标签设置 style= ""
                    'border-radius': img_type,
                    'box-shadow': shadow
                });

            let before = $('<button></button>').text('前移');
            let after = $('<button></button>').text('后移');
            let remove = $('<button></button>').text('删除');

            // 创建一个<li>用来放所有的内容
            let contaier = $('<li>');
            //将图片和三个按钮打包到<li>中
            contaier.append(img,before,after,remove);
            //将<li>添加到页面中的<ul>中
            contaier.appendTo('ul');
            //3. 为三个操作添加功能
            //前移功能:
            before.click(function(){
                //第一步获取到要移动的图片
                let current = $(this).parent();
                let prev = current.prev(); // 前一个元素                
                prev.before(current);
            });

            //后移功能:
            after.click(function(){
                //第一步获取到要移动的图片
                let current = $(this).parent();
                let next = current.next(); // 后一个元素
                next.after(current);
            });

            //删除
            remove.click(function () {
                if (confirm('确认删除吗?')) {
                    $(this).parent().remove();
                }
                return false;
            })
        })

    });

</script>
</body>
</html>

运行实例 »

点击 "运行实例" 按钮查看在线实例


Correction status:Uncorrected

Teacher's comments:
Statement of this Website
The copyright of this blog article belongs to the blogger. Please specify the address when reprinting! If there is any infringement or violation of the law, please contact admin@php.cn Report processing!
All comments Speak rationally on civilized internet, please comply with News Comment Service Agreement
0 comments