SVG实现多彩圆环倒计时效果

圆环倒计时我们经常见到,实现的方法也有很多种。但是本文将介绍一种全新的实现方式,使用SVG来实现倒计时功能。 本文主要用到了SVG的stroke-dasharray和stroke-dashoffset特性。下图是倒计时运行效果: 下面说说相关的实现代码。css实现代码如下: svg { transform: rotate(-0.05deg); } circle { transition: stroke-dasharray .2s; } .time-count-x { line-height: 1.5; position: relative; } .time-second { position: absolute; top: 50%; left: 0; right: 0; margin-top: -.75em; text-align: center; font-size: 100px; } 相关html代码如下: <div id="timeCountX" class="time-count-x"> <svg width="440" height=&qhttp://www.anbomei.com/0067/93f68c6dfacd.htmluot;440" viewBox="0 0 440 440" class="center"> <defs> <linearGradient x1="1" y1="0" x2="0" y2="0" id="gradient1"> http://www.anbomei.com/dc0d/749b176c458e.html <stop offset="0%" stop-color="#e52c5c"></stop> <stop offset="100%" stop-color="#ab5aea"></stop> </linearGradient> <linearGhttp://www.anbomei.com/3750/475040892189.htmlradient x1="1" y1="0" x2="0" y2="0" id="gradient2"> <stop offset="0%" stop-color="#4352f3"></stop> <stop offset="100%" stop-color="#ab5aea"></stop> </linearGradient> </defs> <g transform="mathttp://www.anbomei.com/8588/f84c0039e07c.htmlrix(0,-1,1,0,0,440)"> <circle cx="220" cy="220" r="170" stroke-width="50" stroke="#f0f1f5" fill="none" stroke-dasharray="1069 1069"></circle> <circle cx="220" cy="220" r="170" stroke-width="50" stroke="url('#gradient1')" fill="none" stroke-dasharray="1069 1069"></circle> <circle cx="220" cy="220" r="170" stroke-width="50" stroke="url('#gradient2')" fill="none" stroke-dasharray="534.5 1069"></circle> </g> </svg> <span id="timeSecond" class="time-second"></span> </div> 最后是相关JavaScript代码: var eleChttp://www.anbomei.com/f16b/4dfed00963d5.htmlircles=document.querySelectorAll("#timeCountX circle&qhttp://www.anbomei.com/57af/d57f80a85c4b.htmluot;); var eleTimeSec=document.getElementById("timeSecond"); var perimeter=Math.PI*2*170; varhttp://www.anbomei.com/9e00/1ff18836489a.html circleInit=function(){ if(eleCircles[1]){ eleCircles[1].setAttribute("http://www.anbomei.com/0d84/5f17f64f5f57.html;stroke-dasharray","1069 1069") } if(eleCircles[2]){ eleCircles[2].setAttribute("stroke-dasharray",perimeter/2+" 1069") } ehttp://www.anbomei.com/57fd/81dfe6c70d1e.htmlleTimeSec.innerHTML="" }; var timerTimeCount=null; var fnTimeCount=function(b){ if(timerTimeCount){ return } var b=b||10; var a=function(){ var c=b/10; if(eleCircles[1]){ eleCircles[1].setAttribute("stroke-dasharray",perimeter*c+" 1069") } if(eleCircles[2]&&b<=5){ eleCircles[2].setAttribute("stroke-dasharray",perimeter*c+" 1069") } if(eleTimeSec){ eleTimeSec.innerHTML=b } b--; if(b<0){ clearInterval(timerTimeCount); timerTimeCount=null; alert("时间到!"); circleInit() } }; a(); timerTimehttp://www.anbomei.com/33bb/52eae93517ac.htmlCount=setInterval(a,1000) }; fnTimeCount(); 整个案例的代码非常少,有喜欢的朋友可以将代码保存到html中,运行一下,体验体验实际效果。