jquery创意圆形进度条特效

这是一款jquery创意圆形进度条特效。该jquery圆形进度条通过CSS将进度条美化为两个圆形，内圆作为进度条的指针，指示进度条的刻度，效果非常炫酷。

使用方法

在页面中引入jquery和bootstrtp.min.css文件。

<link rel="stylesheet" href="css/bootstrtp.min.css">
<script type="text/javascript" src="path/to/jquery.min.js"></script>
                

HTML结构

在demo的布局上，采用bootstrap的网格系统，基本的HTML结构如下：

<div class="container">
    <div class="row">
        <div class="col-md-3 col-sm-6">
            <div class="progress blue">
                <span class="progress-left">
                    <span class="progress-bar"></span>
                </span>
                <span class="progress-right">
                    <span class="progress-bar"></span>
                </span>
                <div class="inner-circle"></div>
                <div class="progress-value"><span>8</span>%</div>
            </div>
        </div>
        <div class="col-md-3 col-sm-6">
            <div class="progress yellow">
                <span class="progress-left">
                    <span class="progress-bar"></span>
                </span>
                <span class="progress-right">
                    <span class="progress-bar"></span>
                </span>
                <div class="inner-circle"></div>
                <div class="progress-value"><span>7</span>%</div>
            </div>
        </div>
    </div>
</div>
                

CSS样式

下面的CSS代码用于对进度条进行美化，并通过CSS3 animation动画来制作进度条的动画效果。代码如下：

.progress{
    width: 150px;
    height: 150px;
    line-height: 150px;
    background: none;
    margin: 0 auto;
    box-shadow: none;
    position: relative;
    overflow: visible;
}
.progress:after{
    content: "";
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 5px solid #fff;
    position: absolute;
    top: 0;
    left: 0;
}
.progress > span{
    width: 50%;
    height: 100%;
    overflow: hidden;
    position: absolute;
    top: 0;
    z-index: 1;
}
.progress .progress-left{ left: 0; }
.progress .progress-bar{
    width: 100%;
    height: 100%;
    background: none;
    border-width: 5px;
    border-style: solid;
    position: absolute;
    top: 0;
}
.progress .progress-left .progress-bar{
    left: 100%;
    border-top-right-radius: 80px;
    border-bottom-right-radius: 80px;
    border-left: 0;
    -webkit-transform-origin: center left;
    transform-origin: center left;
}
.progress .progress-right{ right: 0; }
.progress .progress-right .progress-bar{
    left: -100%;
    border-top-left-radius: 80px;
    border-bottom-left-radius: 80px;
    border-right: 0;
    -webkit-transform-origin: center right;
    transform-origin: center right;
    animation: loading-1 1.8s linear forwards;
}
.progress .inner-circle,
.progress .progress-value{
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 5px solid #8e8e8e;
    font-size: 18px;
    font-weight: bold;
    line-height: 50px;
    text-align: center;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 1;
}
.progress .inner-circle:after{
    content: "";
    width: 5px;
    height: 60px;
    background: #8e8e8e;
    margin: 0 auto;
    position: absolute;
    top: -60px;
    left: 0;
    right: 0;
    z-index: 2;
    transition: all 10s linear 0s;
}
.progress.blue .progress-bar{ border-color: #049dff; }
.progress.blue .progress-value{ color: #049dff; }
.progress.blue .progress-left .progress-bar{ animation: loading-2 1.5s linear forwards 1.8s; }
.progress.blue .inner-circle{ animation: loading-6 3.8s ease forwards; }
.progress.yellow .progress-bar{ border-color: #fdba04; }
.progress.yellow .progress-value{ color: #fdba04; }
.progress.yellow .progress-left .progress-bar{ animation: loading-3 1s linear forwards 1.8s; }
.progress.yellow .inner-circle{ animation: loading-7 3.8s ease forwards; }
.progress.pink .progress-bar{ border-color: #ed687c; }
.progress.pink .progress-value{ color: #ed687c; }
.progress.pink .progress-left .progress-bar{ animation: loading-4 0.4s linear forwards 1.8s; }
.progress.pink .inner-circle{ animation: loading-8 3.8s ease forwards; }
.progress.green .progress-bar{ border-color: #1abc9c; }
.progress.green .progress-value{ color: #1abc9c; }
.progress.green .progress-left .progress-bar{ animation: loading-5 1.2s linear forwards 1.8s; }
.progress.green .inner-circle{ animation: loading-9 3.8s ease forwards; }
@keyframes loading-1{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(180deg);
        transform: rotate(180deg);
    }
}
@keyframes loading-2{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(144deg);
        transform: rotate(144deg);
    }
}
@keyframes loading-3{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(90deg);
        transform: rotate(90deg);
    }
}
@keyframes loading-4{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100%{
        -webkit-transform: rotate(36deg);
        transform: rotate(36deg);
    }
}
@keyframes loading-5{
     0%{
         -webkit-transform: rotate(0deg);
         transform: rotate(0deg);
     }
     100%{
         -webkit-transform: rotate(126deg);
         transform: rotate(126deg);
     }
}
@keyframes loading-6{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    50%{
        -webkit-transform: rotate(180deg);
        transform: rotate(180deg);
    }
    100%{
        -webkit-transform: rotate(324deg);
        transform: rotate(324deg);
    }
}
@keyframes loading-7{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    50%{
        -webkit-transform: rotate(180deg);
        transform: rotate(180deg);
    }
    100%{
        -webkit-transform: rotate(270deg);
        transform: rotate(270deg);
    }
}
@keyframes loading-8{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    50%{
        -webkit-transform: rotate(180deg);
        transform: rotate(180deg);
    }
    100%{
        -webkit-transform: rotate(216deg);
        transform: rotate(216deg);
    }
}
@keyframes loading-9{
    0%{
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    50%{
        -webkit-transform: rotate(180deg);
        transform: rotate(180deg);
    }
    100%{
        -webkit-transform: rotate(306deg);
        transform: rotate(306deg);
    }
}
@media only screen and (max-width: 990px){
    .progress{ margin-bottom: 20px; }
}                  
                

JavaScript

最后，圆形进度条的百分比数值动画采用jquery的animate方法来制作，代码如下：

$(document).ready(function(){
    $('.progress-value > span').each(function(){
        $(this).prop('Counter',0).animate({
            Counter: $(this).text()
        },{
            duration: 3500,
            easing: 'swing',
            step: function (now){
                $(this).text(Math.ceil(now));
            }
        });
    });
});