我想在我的网站上有一个百分比圆圈指示器:
![Radial progress bar mockup](https://i.stack.imgur.com/cGq25.png)
在本例中,它显示 75%。这应该怎么做呢?我在图像文件中有黄色圆圈,但如果更容易,以某种方式,使用 CSS 来完成这一切,那对我来说没问题。
考虑到进度条的形状(圆形结束/开始),我建议使用 SVG。
DEMO: 径向进度条
![Radial progress bar](https://i.stack.imgur.com/cK5lv.jpg)
在以下示例中,进度以动画显示stroke-dasarray
属性和 % 数字通过 jQuery 递增:
var count = $(('#count'));
$({ Counter: 0 }).animate({ Counter: count.text() }, {
duration: 5000,
easing: 'linear',
step: function () {
count.text(Math.ceil(this.Counter)+ "%");
}
});
body{text-align:center;font-family: 'Open Sans', sans-serif;}
svg{width:25%;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<svg id="animated" viewbox="0 0 100 100">
<circle cx="50" cy="50" r="45" fill="#FDB900"/>
<path fill="none" stroke-linecap="round" stroke-width="5" stroke="#fff"
stroke-dasharray="251.2,0"
d="M50 10
a 40 40 0 0 1 0 80
a 40 40 0 0 1 0 -80">
<animate attributeName="stroke-dasharray" from="0,251.2" to="251.2,0" dur="5s"/>
</path>
<text id="count" x="50" y="50" text-anchor="middle" dy="7" font-size="20">100%</text>
</svg>
不幸的是,IT 不支持 svg SMIL 动画。要通过 IE 支持获得相同的结果,您可以使用类似的库snap.svg并动画化stroke-dasharray
JS 属性:
var count = $(('#count'));
$({ Counter: 0 }).animate({ Counter: count.text() }, {
duration: 5000,
easing: 'linear',
step: function () {
count.text(Math.ceil(this.Counter)+ "%");
}
});
var s = Snap('#animated');
var progress = s.select('#progress');
progress.attr({strokeDasharray: '0, 251.2'});
Snap.animate(0,251.2, function( value ) {
progress.attr({ 'stroke-dasharray':value+',251.2'});
}, 5000);
body{text-align:center;font-family:sans-serif;}
svg{width:25%;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/snap.svg/0.3.0/snap.svg-min.js"></script>
<svg id="svg" viewbox="0 0 100 100">
<circle cx="50" cy="50" r="45" fill="#FDB900"/>
<path fill="none" stroke-linecap="round" stroke-width="5" stroke="#fff"
stroke-dasharray="1,250.2"
d="M50 10
a 40 40 0 0 1 0 80
a 40 40 0 0 1 0 -80"/>
<text x="50" y="50" text-anchor="middle" dy="7" font-size="20">1%</text>
</svg>
<svg viewbox="0 0 100 100">
<circle cx="50" cy="50" r="45" fill="#FDB900"/>
<path fill="none" stroke-linecap="round" stroke-width="5" stroke="#fff"
stroke-dasharray="125.6,125.6"
d="M50 10
a 40 40 0 0 1 0 80
a 40 40 0 0 1 0 -80"/>
<text x="50" y="50" text-anchor="middle" dy="7" font-size="20">50%</text>
</svg>
<svg id="animated" viewbox="0 0 100 100">
<circle cx="50" cy="50" r="45" fill="#FDB900"/>
<path id="progress" stroke-linecap="round" stroke-width="5" stroke="#fff" fill="none"
d="M50 10
a 40 40 0 0 1 0 80
a 40 40 0 0 1 0 -80">
</path>
<text id="count" x="50" y="50" text-anchor="middle" dy="7" font-size="20">100%</text>
</svg>
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