開關效果

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>開關</title>
    <style>
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        -moz-box-sizing: border-box;
        -webkit-box-sizing: border-box;
        outline: 0;
    }
    
    .hb {
        height: 100%;
        position: relative;
        max-width: 640px;
        margin: 0 auto;
    }
    
    .img {
        width: 88.75%;
        margin: 15.31% auto 0;
        position: relative;
    }
    
    .oc {
        width: 12%;
        position: absolute;
        top: 3.25%;
        right: 10%;
        overflow: hidden;
        background-color: #e4e4e4;
        border-radius: 36px;
        padding: .4% .3% .1%;
    }
    
    .oct {
        transition: all .2s ease-out;
        -webkit-transition: all .2s ease-out;
        -moz-transition: all .2s ease-out;
        -o-transition: all .2s ease-out;
    }
    
    .oc i {
        display: inline-block;
        width: 40%;
        border-radius: 100%;
        position: relative;
        left: 0;
    }
    
    .oco {
        background-color: #d40017 !important;
    }
    
    .oco i {
        left: 60%
    }
    .img img{
        width: 100%
    }
    </style>
    <script type="text/javascript" src="http://t.moonbasa.com/Scripts/jquery-1.7.1.min.js?id=20141128"></script>
</head>

<body>
    <div class="hb">
        <div class="img" style="font-size:0">
            ![](http://upload-images.jianshu.io/upload_images/6449520-54a61e1423ee5f12.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
            ![](http://upload-images.jianshu.io/upload_images/6449520-f3f054001f4cd680.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
            ![](http://upload-images.jianshu.io/upload_images/6449520-68a49bd302b55ea0.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
            <div class="oc">
                <i>![](http://upload-images.jianshu.io/upload_images/6449520-aee2feb8ed5f02f8.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)</i>
            </div>
        </div>
    </div>
    <script type="text/javascript">
    $(function() {
        var isSub = true;
        console.log(isSub);
        $(".oc").on('click', function() {
            if (isSub) {
                isSub = false;
                $(".oc").addClass('oco').addClass("oct");
                $(".oc").find("i").addClass("oct");

            } else {
                isSub = true;
                $('.oc').removeClass('oco').addClass('oct');
                $('.oc').find('i').addClass('oct');
            }
        });
    });
    </script>
</body>

</html>
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