圆圈进度条

2017-04-28 本文已影响25人山豆山豆
利用
css的transform来实现圆圈进度条
图片.png

主要是利用了其半遮挡 的原理。

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>圆边</title>
    <style type="text/css" media="screen">
    .circle-press-box {
        overflow: hidden;
        display: block;
        width: 200px;
        height: 200px;
        background-color: transparent;
        margin: auto;
        position: relative;
    }
    
    .circle-box {
        box-sizing: border-box;
        display: block;
        border-radius: 50%;
        width: 100%;
        height: 100%;
        border: 20px solid red;
    }
    
    .left-bg {
        box-sizing: border-box;
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        transform: rotate(0deg);
        border-left: 100px solid #fff;
    }
    
    .right-bg {
        box-sizing: border-box;
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        transform: rotate(0deg);
        border-right: 100px solid #fff;
    }
    
    .big-half-box {
        position: absolute;
        top: 0;
        width: 100%;
        height: 100%;
        display: none;
        transform: rotate(0deg);
    }
    
    .half-box {
        position: absolute;
        top: 0;
        right: 0;
        overflow: hidden;
        width: 50%;
        height: 100%;
    }
    
    .half-circle {
        box-sizing: border-box;
        position: absolute;
        top: 0;
        right: 0;
        border-radius: 50%;
        width: 200%;
        height: 100%;
        border: 20px solid red;
    }
    
    .text-box {
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        text-align: center;
        line-height: 200px;
    }
    </style>
</head>

<body>
    <div class="circle-press-box">
        <div class="circle-box"></div>
        <div class="left-bg"></div>
        <div class="right-bg"></div>
        <div class="big-half-box">
            <div class="half-box">
                <div class="half-circle"></div>
            </div>
        </div>
        <div class="text-box">
            123
        </div>
    </div>
    <script src="js/jquery-1.7.2.js"></script>
    <script type="text/javascript">
    $(function() {
        var r_val = 0;
        setInterval(function() {
            r_val+=1;
            r_val=r_val%360;
            console.log(r_val);
            if (r_val>=180) {
                
                $('.big-half-box').css({'display':'block','transform': 'rotate(' +(r_val-180)+ 'deg)'});
            }else{
                $('.right-bg').css('transform', 'rotate(' + r_val + 'deg)');
                $('.big-half-box').css('display','none');
            }
            $('.text-box').text(parseInt((r_val/360).toFixed(2)*100)+'%');
        }, 30);



    });
    </script>
</body>

</html>
圆圈进度条

猜你喜欢

热点阅读
