实现一个圆形进度条

现在的一些数据运营活动h5页面中,通常回涉及到圆形的进度条,比如京东白条,蚂蚁芝麻分。最近做了一个类似的,当然前期想法是用canvas做,但是考虑到低端安卓手机的渲染能力,最终以纯原生css+js实现,总结一下

效果图

思路

index0底层一个色值#c1a76b的圆,中间index1一个三角形,也就是底边缺的效果,上层index2是白色全圆(带阴影,600和信用极好包裹在里面),另外左右50%各铺一个index3,index4透明层,这个层overflow:hidden,两个层里面都有一个#f7f7f7的填充,通过旋转这两个填充物来实现圆形进度效果(先左边旋转180deg完,再旋转右边)

动态图

贴代码

<!DOCTYPE html>
<html>
    <head>
        <style>
            body {
                background-color: #f7f7f7;
            }
            .new-cricle {
                position: relative;
                width: 148px;
                height: 148px;
                border-radius: 50%;
                background-color: #c1a76b;
                margin: 0 auto;
                z-index: 0;
            }

            .new-cricle .cricle-text {
                position: absolute;
                top: 20px;
                width: 130px;
                left: 50%;
                margin-left: -65px;
                z-index: 5;
                text-align: center;
            }
            .new-cricle .cricle-text.p0 {
                top: 28px;
                font-size: 42px;
                color: #C09B5B;
                font-family: DINAlternate-Bold;
            }
            .new-cricle .cricle-text.txt2 {
                top: 85px;
                font-size: 16px;
                color: #C09B5B;
                font-family: PingFangSC-Medium;
            }

            .cricle-left-area {
                position: absolute;
                top: -1px;
                left: -1px;
                width: 75px;
                height: 150px;
                background-color: transparent;
                overflow: hidden;
            }
            .cricle-left {
                position: absolute;
                width: 75px;
                height: 150px;
                background-color: #f7f7f7;
                border-radius: 75px 0 0 75px;
                transform-origin: right center;
                z-index: 1;
                transition: 1.5s all;
                transform: rotate(35deg);
            }

            .cricle-right-area {
                position: absolute;
                top: -1px;
                right: -1px;
                width: 75px;
                height: 150px;
                background-color: transparent;
                overflow: hidden;
            }
            .cricle-right {
                position: absolute;
                width: 75px;
                height: 150px;
                background-color: #f7f7f7;
                border-radius: 0 75px 75px 0;
                transform-origin: left center;
                z-index: 2;
                transition: 1.5s all;
            }
            .triangle {
                width: 0;
                height: 0;
                border-width: 0 80px 80px;
                border-style: solid;
                border-color: transparent transparent #f7f7f7;/*透明 透明  白*/
                position: absolute;
                bottom: -10px;
                left: 50%;
                margin-left: -80px;
                z-index: 3;

            }
            .cricle-all {
                position: relative;
                width: 128px;
                height: 128px;
                border-radius: 50%;
                background-color: #fff;
                box-shadow: 0 2px 15px 0 #D8CEBB;
                margin: 0 auto;
                z-index: 4;
                top: 10px;
            }
        </style>
    </head>
    <body>
        <div class="new-cricle">
            <div class="cricle-left-area">
                <div class="cricle-left" id="cricleLeft"></div>
            </div>

            <div class="cricle-right-area">
                <div class="cricle-right" id="cricleRight"></div>
            </div>

            <div class="triangle"></div>
            <div class="cricle-all"></div>

            <div class="cricle-text p0">600</div>
            <div class="cricle-text txt2">信用极好</div>
        </div>
    </body>

    <script>
        var $cricleLeft = document.getElementById('cricleLeft')
        var $cricleRight = document.getElementById('cricleRight')
        
        var angle = 360; //旋钮角度

        setTimeout(function(){
            if(angle >= 180){
                $cricleLeft.style.transform = 'rotate(180deg)';
                setTimeout(function(){
                    $cricleRight.style.transform = 'rotate('+ (angle - 180) +'deg)';
                }, 1400)
            }else{
                $cricleLeft.style.transform = 'rotate(' + angle + 'deg)';
            }
        }, 1000)
        
        
    </script>
</html>

在线demo地址

点击进入

存在问题

  • 左边当旋转到180deg有一个放缓慢的效果
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posted @ 2018-12-10 14:22  微人类  阅读(363)  评论(0编辑  收藏  举报