加载时圆形进度条的动画

Question

任何人都可以帮我加载页面后如何开始对进度条边框进行动画处理，我需要为所有百分比设置动画...请向我提出任何帮助...非常感谢问题。

请提供一个参考，以说明此示例如何在加载时启动动画

我需要与click here类似的动画

.progress-circle {
   font-size: 20px;
   margin: 20px;
   position: relative; /* so that children can be absolutely positioned */
   padding: 0;
   width: 5em;
   height: 5em;
   background-color: #F2E9E1; 
   border-radius: 50%;
   line-height: 5em;
}

.progress-circle:after{
    border: none;
    position: absolute;
    top: 0.35em;
    left: 0.35em;
    text-align: center;
    display: block;
    border-radius: 50%;
    width: 4.3em;
    height: 4.3em;
    background-color: white;
    content: " ";
}
/* Text inside the control */
.progress-circle span {
    position: absolute;
    line-height: 5em;
    width: 5em;
    text-align: center;
    display: block;
    color: #53777A;
    z-index: 2;
}
.left-half-clipper { 
   /* a round circle */
   border-radius: 50%;
   width: 5em;
   height: 5em;
   position: absolute; /* needed for clipping */
   clip: rect(0, 5em, 5em, 2.5em); /* clips the whole left half*/ 
}
/* when p>50, don't clip left half*/
.progress-circle.over50 .left-half-clipper {
   clip: rect(auto,auto,auto,auto);
}
.value-bar {
   /*This is an overlayed square, that is made round with the border radius,
   then it is cut to display only the left half, then rotated clockwise
   to escape the outer clipping path.*/ 
   position: absolute; /*needed for clipping*/
   clip: rect(0, 2.5em, 5em, 0);
   width: 5em;
   height: 5em;
   border-radius: 50%;
   border: 0.45em solid #53777A; /*The border is 0.35 but making it larger removes visual artifacts */
   /*background-color: #4D642D;*/ /* for debug */
   box-sizing: border-box;
  
}
/* Progress bar filling the whole right half for values above 50% */
.progress-circle.over50 .first50-bar {
   /*Progress bar for the first 50%, filling the whole right half*/
   position: absolute; /*needed for clipping*/
   clip: rect(0, 5em, 5em, 2.5em);
   background-color: #53777A;
   border-radius: 50%;
   width: 5em;
   height: 5em;
}
.progress-circle:not(.over50) .first50-bar{ display: none; }


/* Progress bar rotation position */
.progress-circle.p0 .value-bar { display: none; }
.progress-circle.p1 .value-bar { transform: rotate(4deg); }
.progress-circle.p2 .value-bar { transform: rotate(7deg); }
.progress-circle.p3 .value-bar { transform: rotate(11deg); }
.progress-circle.p4 .value-bar { transform: rotate(14deg); }
.progress-circle.p5 .value-bar { transform: rotate(18deg); }
.progress-circle.p6 .value-bar { transform: rotate(22deg); }
.progress-circle.p7 .value-bar { transform: rotate(25deg); }
.progress-circle.p8 .value-bar { transform: rotate(29deg); }
.progress-circle.p9 .value-bar { transform: rotate(32deg); }
.progress-circle.p10 .value-bar { transform: rotate(36deg); }
.progress-circle.p11 .value-bar { transform: rotate(40deg); }
.progress-circle.p12 .value-bar { transform: rotate(43deg); }
.progress-circle.p13 .value-bar { transform: rotate(47deg); }
.progress-circle.p14 .value-bar { transform: rotate(50deg); }
.progress-circle.p15 .value-bar { transform: rotate(54deg); }
.progress-circle.p16 .value-bar { transform: rotate(58deg); }
.progress-circle.p17 .value-bar { transform: rotate(61deg); }
.progress-circle.p18 .value-bar { transform: rotate(65deg); }
.progress-circle.p19 .value-bar { transform: rotate(68deg); }
.progress-circle.p20 .value-bar { transform: rotate(72deg); }
.progress-circle.p21 .value-bar { transform: rotate(76deg); }
.progress-circle.p22 .value-bar { transform: rotate(79deg); }
.progress-circle.p23 .value-bar { transform: rotate(83deg); }
.progress-circle.p24 .value-bar { transform: rotate(86deg); }
.progress-circle.p25 .value-bar { transform: rotate(90deg); }
.progress-circle.p26 .value-bar { transform: rotate(94deg); }
.progress-circle.p27 .value-bar { transform: rotate(97deg); }
.progress-circle.p28 .value-bar { transform: rotate(101deg); }
.progress-circle.p29 .value-bar { transform: rotate(104deg); }
.progress-circle.p30 .value-bar { transform: rotate(108deg); }
.progress-circle.p31 .value-bar { transform: rotate(112deg); }
.progress-circle.p32 .value-bar { transform: rotate(115deg); }
.progress-circle.p33 .value-bar { transform: rotate(119deg); }
.progress-circle.p34 .value-bar { transform: rotate(122deg); }
.progress-circle.p35 .value-bar { transform: rotate(126deg); }
.progress-circle.p36 .value-bar { transform: rotate(130deg); }
.progress-circle.p37 .value-bar { transform: rotate(133deg); }
.progress-circle.p38 .value-bar { transform: rotate(137deg); }
.progress-circle.p39 .value-bar { transform: rotate(140deg); }
.progress-circle.p40 .value-bar { transform: rotate(144deg); }
.progress-circle.p41 .value-bar { transform: rotate(148deg); }
.progress-circle.p42 .value-bar { transform: rotate(151deg); }
.progress-circle.p43 .value-bar { transform: rotate(155deg); }
.progress-circle.p44 .value-bar { transform: rotate(158deg); }
.progress-circle.p45 .value-bar { transform: rotate(162deg); }
.progress-circle.p46 .value-bar { transform: rotate(166deg); }
.progress-circle.p47 .value-bar { transform: rotate(169deg); }
.progress-circle.p48 .value-bar { transform: rotate(173deg); }
.progress-circle.p49 .value-bar { transform: rotate(176deg); }
.progress-circle.p50 .value-bar { transform: rotate(180deg); }
.progress-circle.p51 .value-bar { transform: rotate(184deg); }
.progress-circle.p52 .value-bar { transform: rotate(187deg); }
.progress-circle.p53 .value-bar { transform: rotate(191deg); }
.progress-circle.p54 .value-bar { transform: rotate(194deg); }
.progress-circle.p55 .value-bar { transform: rotate(198deg); }
.progress-circle.p56 .value-bar { transform: rotate(202deg); }
.progress-circle.p57 .value-bar { transform: rotate(205deg); }
.progress-circle.p58 .value-bar { transform: rotate(209deg); }
.progress-circle.p59 .value-bar { transform: rotate(212deg); }
.progress-circle.p60 .value-bar { transform: rotate(216deg); }
.progress-circle.p61 .value-bar { transform: rotate(220deg); }
.progress-circle.p62 .value-bar { transform: rotate(223deg); }
.progress-circle.p63 .value-bar { transform: rotate(227deg); }
.progress-circle.p64 .value-bar { transform: rotate(230deg); }
.progress-circle.p65 .value-bar { transform: rotate(234deg); }
.progress-circle.p66 .value-bar { transform: rotate(238deg); }
.progress-circle.p67 .value-bar { transform: rotate(241deg); }
.progress-circle.p68 .value-bar { transform: rotate(245deg); }
.progress-circle.p69 .value-bar { transform: rotate(248deg); }
.progress-circle.p70 .value-bar { transform: rotate(252deg); }
.progress-circle.p71 .value-bar { transform: rotate(256deg); }
.progress-circle.p72 .value-bar { transform: rotate(259deg); }
.progress-circle.p73 .value-bar { transform: rotate(263deg); }
.progress-circle.p74 .value-bar { transform: rotate(266deg); }
.progress-circle.p75 .value-bar { transform: rotate(270deg); }
.progress-circle.p76 .value-bar { transform: rotate(274deg); }
.progress-circle.p77 .value-bar { transform: rotate(277deg); }
.progress-circle.p78 .value-bar { transform: rotate(281deg); }
.progress-circle.p79 .value-bar { transform: rotate(284deg); }
.progress-circle.p80 .value-bar { transform: rotate(288deg); }
.progress-circle.p81 .value-bar { transform: rotate(292deg); }
.progress-circle.p82 .value-bar { transform: rotate(295deg); }
.progress-circle.p83 .value-bar { transform: rotate(299deg); }
.progress-circle.p84 .value-bar { transform: rotate(302deg); }
.progress-circle.p85 .value-bar { transform: rotate(306deg); }
.progress-circle.p86 .value-bar { transform: rotate(310deg); }
.progress-circle.p87 .value-bar { transform: rotate(313deg); }
.progress-circle.p88 .value-bar { transform: rotate(317deg); }
.progress-circle.p89 .value-bar { transform: rotate(320deg); }
.progress-circle.p90 .value-bar { transform: rotate(324deg); }
.progress-circle.p91 .value-bar { transform: rotate(328deg); }
.progress-circle.p92 .value-bar { transform: rotate(331deg); }
.progress-circle.p93 .value-bar { transform: rotate(335deg); }
.progress-circle.p94 .value-bar { transform: rotate(338deg); }
.progress-circle.p95 .value-bar { transform: rotate(342deg); }
.progress-circle.p96 .value-bar { transform: rotate(346deg); }
.progress-circle.p97 .value-bar { transform: rotate(349deg); }
.progress-circle.p98 .value-bar { transform: rotate(353deg); }
.progress-circle.p99 .value-bar { transform: rotate(356deg); }
.progress-circle.p100 .value-bar { transform: rotate(360deg); }
.progres-circle{
    animation: loading-2 1.5s linear forwards 1.8s;
}
@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);
    }
}
@media only screen and (max-width: 990px){
    .progress-circle{ margin-bottom: 20px; }
}

<div class="progress-circle p10">
   <span>10%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle p33">
   <span>33%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p66">
   <span>66%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p77">
   <span>77%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p99">
   <span>99%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>
<div class="progress-circle over50 p100">
   <span>100%</span>
   <div class="left-half-clipper">
      <div class="first50-bar"></div>
      <div class="value-bar"></div>
   </div>
</div>

Answer 1

因此，如果隐藏黑色百分比圆，您会看到它们使用CSS创建了两个带边框的半圆，并且它们根据百分比值旋转它们：

这是半圆边框的代码：

.progress-bar {
    animation: loading-2 1.5s linear forwards 1.8s;
    border-color: #049dff;
    border-top-right-radius: 80px;
    border-bottom-right-radius: 80px;
    border-left: 0;
    transform-origin: center left;
}

请注意，他们已使用animation-fill-mode: forwards确保动画保留在结束位置。