纯css制作圆形进度条

效果图大概是这样的

第一步先定义出一个方形盒子

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.circleProgress_wrapper{width: 200px;height: 200px;margin: 50px auto;position: relative;border:1px solid #ddd;}</style>
</head>
<body><div class="circleProgress_wrapper"></div>
</body>
</html>

第二步将盒子分为两半，左右个占一半

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.circleProgress_wrapper{width: 200px;height: 200px;margin: 50px auto;position: relative;border:1px solid #ddd;}.wrapper{width: 100px;height: 200px;position: absolute;top:0;overflow: hidden;}.right{right:0;border: solid 1px black;}.left{left:0;border: solid 1px red;}</style>
</head>
<body><div class="circleProgress_wrapper"><div class="wrapper right"></div><div class="wrapper left"></div></div>
</body>
</html>

第三步在这两个盒子中再分别放一个盒子并且给他们的边框大小为20px

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.circleProgress_wrapper{width: 200px;height: 200px;margin: 50px auto;position: relative;border:1px solid #ddd;}.wrapper{width: 100px;height: 200px;position: absolute;top:0;/* overflow: hidden; */}.right{right:0;border: solid 1px black;}.left{left:0;border: solid 1px red;}.circleProgress{width: 160px;height: 160px;border:20px solid rgb(172, 172, 172);position: absolute;top:0;}.rightcircle{border: solid 20px rgb(71, 82, 10);right:0;}.leftcircle{border: solid 20px rgb(218, 252, 24);left:0;}</style>
</head>
<body><div class="circleProgress_wrapper"><div class="wrapper right"><div class="circleProgress rightcircle"></div></div><div class="wrapper left"><div class="circleProgress leftcircle"></div></div></div>
</body>
</html>

到这一步大家可以看见一个黄色的方形，但只能看见一个，另一个被这个黄色方形遮住了，这个时候我们要给那两个class为 wrapper的div加上个属性 overflow:hidden

          .wrapper{width: 100px;height: 200px;position: absolute;top:0;overflow: hidden;}

加上之后我们在看一看

此时我们已经能看见两个方形了，只不过都只能看见一半，因为加上 overflow:hidden 后超出的部分隐藏了

第四步给这两个黄色的方形和褐色的方形定义右上边框和左下边框

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.circleProgress_wrapper{width: 200px;height: 200px;margin: 50px auto;position: relative;border:1px solid #ddd;}.wrapper{width: 100px;height: 200px;position: absolute;top:0;overflow: hidden;}.right{right:0;border: solid 1px black;}.left{left:0;border: solid 1px red;}.circleProgress{width: 160px;height: 160px;border:20px solid rgb(172, 172, 172);position: absolute;top:0;}.rightcircle{border-top:20px solid rgb(71, 82, 10);border-right:20px solid rgb(71, 82, 10);right:0;}.leftcircle{border-bottom:20px solid rgb(218, 252, 24);border-left:20px solid rgb(218, 252, 24);left:0;}</style>
</head>
<body><div class="circleProgress_wrapper"><div class="wrapper right"><div class="circleProgress rightcircle"></div></div><div class="wrapper left"><div class="circleProgress leftcircle"></div></div></div>
</body>
</html>

好现在我们可以看见三种颜色黄色褐色以及灰色

一个是左下边框的黄色和右上边框的褐色这两个颜色分别是我们自己刚刚定义的

而那个灰色则是默认色，因为之前我们是给所有的边框都定义了颜色，当现在我们只给左下和右上的边框定义了颜色，其他没有定义颜色的部分就默认为灰色

第五步给这两个黄色和褐色的方形加上个属性 border-radius: 50%;

          .circleProgress{width: 160px;height: 160px;border:20px solid rgb(172, 172, 172);position: absolute;top:0;border-radius: 50%;}

此时我们可以看到这样的效果

第六步旋转角度关键的一步来了 transform: rotate(-135deg);

          .circleProgress{width: 160px;height: 160px;border:20px solid rgb(172, 172, 172);position: absolute;top:0;border-radius: 50%;transform: rotate(-135deg);}

此时我们看到的是一个全灰色的圆形

但这其实是两个圆形就是刚刚那两个黄色和褐色的圆形，只不过旋转之后有颜色的部分都被遮住了

看到的只是没有颜色的部分所有看起来是一个圆形

可以把 overflow: hidden; 属性暂时去掉就能看到旋转后的效果

第七步添加动画

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.circleProgress_wrapper{width: 200px;height: 200px;margin: 50px auto;position: relative;border:1px solid #ddd;}.wrapper{width: 100px;height: 200px;position: absolute;top:0;overflow: hidden;}.right{right:0;border: solid 1px black;}.left{left:0;border: solid 1px red;}.circleProgress{width: 160px;height: 160px;border:20px solid rgb(172, 172, 172);position: absolute;top:0;border-radius: 50%;transform: rotate(-135deg);}.rightcircle{border-top:20px solid rgb(71, 82, 10);border-right:20px solid rgb(71, 82, 10);right:0;animation: circleProgressLoad_right 5s linear infinite;}.leftcircle{border-bottom:20px solid rgb(218, 252, 24);border-left:20px solid rgb(218, 252, 24);left:0;animation: circleProgressLoad_left 5s linear infinite;}@keyframes circleProgressLoad_right{0%{-webkit-transform: rotate(-135deg);}50%,100%{-webkit-transform: rotate(45deg);}}@keyframes circleProgressLoad_left{0%,50%{-webkit-transform: rotate(-135deg);}100%{-webkit-transform: rotate(45deg);}}</style>
</head>
<body><div class="circleProgress_wrapper"><div class="wrapper right"><div class="circleProgress rightcircle"></div></div><div class="wrapper left"><div class="circleProgress leftcircle"></div></div></div>
</body>
</html>

这里注意左边圆形的动画的开始时间是50% 而右边的是在0%

此时我们可以看一下旋转的效果我这没有动图大家可以自己复制代码看一下

最后一步将两个圆形的边框颜色统一，此时圆形进度条完成

           .rightcircle{border-top:20px solid rgb(218, 252, 24);border-right:20px solid rgb(218, 252, 24);right:0;animation: circleProgressLoad_right 5s linear infinite;}.leftcircle{border-bottom:20px solid rgb(218, 252, 24);border-left:20px solid rgb(218, 252, 24);left:0;animation: circleProgressLoad_left 5s linear infinite;}

最后贴出完整代码

<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title></title><style>.circleProgress_wrapper{width: 200px;height: 200px;margin: 50px auto;position: relative;border:1px solid #ddd;}.wrapper{width: 100px;height: 200px;position: absolute;top:0;overflow: hidden;}.right{right:0;border: solid 1px black;}.left{left:0;border: solid 1px red;}.circleProgress{width: 160px;height: 160px;border:20px solid rgb(172, 172, 172);position: absolute;top:0;border-radius: 50%;transform: rotate(-135deg);}.rightcircle{border-top:20px solid rgb(218, 252, 24);border-right:20px solid rgb(218, 252, 24);right:0;animation: circleProgressLoad_right 5s linear infinite;}.leftcircle{border-bottom:20px solid rgb(218, 252, 24);border-left:20px solid rgb(218, 252, 24);left:0;animation: circleProgressLoad_left 5s linear infinite;}@keyframes circleProgressLoad_right{0%{-webkit-transform: rotate(-135deg);}50%,100%{-webkit-transform: rotate(45deg);}}@keyframes circleProgressLoad_left{0%,50%{-webkit-transform: rotate(-135deg);}100%{-webkit-transform: rotate(45deg);}}</style>
</head>
<body><div class="circleProgress_wrapper"><div class="wrapper right"><div class="circleProgress rightcircle"></div></div><div class="wrapper left"><div class="circleProgress leftcircle"></div></div></div>
</body>
</html>