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

实现一个圆形进度条

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

实现一个圆形进度条

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> <div> <div></div> </div> <div> <div></div> </div> <div></div> <div></div> <div>600</div> <div>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

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存在问题

左边当旋转到180deg有一个放缓慢的效果

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