圆形加载动画 [英] Circle loading animation

问题描述

我正在尝试创建 Apple 的 OS X 圆圈加载动画.

I'm trying to create Apple's OS X circle loading animation.

到目前为止我尝试过的:

What I have tried so far:

.animation-wrapper {
  width: 200px;
  height: 200px;
  border: 1px solid black;
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  filter: brightness(0.8);
  -webkit-filter: brightness(0.8);
}
.pie-piece1 {
  position: absolute;
  width: 50%;
  height: 50%;
  bottom: 0;
  left: 0;
  background: linear-gradient(to right, rgba(255, 0, 0, 1) 0%, rgba(255, 255, 0, 1) 100%);
}
.pie-piece2 {
  position: absolute;
  width: 50%;
  height: 50%;
  bottom: 0;
  right: 0;
  background: linear-gradient(to right, rgba(255, 255, 0, 1) 0%, rgba(0, 255, 0, 1) 100%);
}
.pie-piece3 {
  position: absolute;
  width: 50%;
  height: 50%;
  top: 0;
  left: 0;
  background: linear-gradient(to right, rgba(255, 0, 0, 1) 0%, rgba(255, 0, 255, 1) 100%);
}
.pie-piece4 {
  position: absolute;
  width: 50%;
  height: 50%;
  top: 0;
  right: 0;
  background: linear-gradient(to right, rgba(255, 0, 255, 1) 0%, rgba(0, 0, 255, 1) 100%);
}
.rotating-spinners {
  position: absolute;
}
.spike {
  fill: rgba(22, 22, 22, 0.5);
}

<figure class="animation-wrapper">
  <div class="pie-piece1"></div>
  <div class="pie-piece2"></div>
  <div class="pie-piece3"></div>
  <div class="pie-piece4"></div>
  <svg class="rotating-spinners" width="100%" height="100%" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
      <path id="spin-part" class="spike" d="M 65,-40 C 65,-40 80,20 50,50 60,40 50,-40 50,-40Z" />
    </defs>
    <use x="0" y="0" xlink:href="#spin-part" />
    <use x="0" y="0" xlink:href="#spin-part" transform="rotate(60, 50, 50)" />
    <use x="0" y="0" xlink:href="#spin-part" transform="rotate(120, 50, 50)" />
    <use x="0" y="0" xlink:href="#spin-part" transform="rotate(180, 50, 50)" />
    <use x="0" y="0" xlink:href="#spin-part" transform="rotate(240, 50, 50)" />
    <use x="0" y="0" xlink:href="#spin-part" transform="rotate(300, 50, 50)" />
  </svg>
</figure>

线性渐变似乎没有正确排列，因为我找不到使渐变在两个方向上的方法.

The linear gradients don't seem to line up correctly since i couldn't find a way to make the gradients go in two directions.

有没有办法只使用 CSS 或 SVG 来创建它，而不像我所做的那样混合它们?

Is there a way to create this using only CSS or SVG without mixing them like I have done?

或者我可以使用其他解决方案，例如画布或某种图像魔术吗?

Or are there other solutions I can use like canvas or some kind of image magic?

推荐答案

这是我的努力.锥形渐变是通过计算OP发布的动画GIF中每个像素的最大值来提取的嵌入位图图像.半透明的黑色风车图案叠加在其上并进行动画处理，模糊滤镜消除了 JPEG 伪影.

Here's my effort. The conical gradient is an embedded bitmap image extracted by calculating the maximum value of each pixel in the animated GIF posted by the OP. A semi-opaque black windmill pattern is superimposed on top of that and animated, and a blur filter gets rid of the JPEG artefacts.

(添加了一个反光高光，使其看起来更 3D)

( Added a reflective highlight to make it look a bit more 3D)

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
  width="121" height="121" viewBox="0 0 121 121">
  <defs>
    <clipPath id="circ">
      <circle r="60" cx="60.5" cy="60.5"/>
    </clipPath>
    <linearGradient id="shine" x1="0%" y1="0%" x2="0%" y2="100%">
      <stop offset="0%" style="stop-color:#fff;stop-opacity:0.6" />
      <stop offset="10%" style="stop-color:#fff;stop-opacity:0.3" />
      <stop offset="20%" style="stop-color:#fff;stop-opacity:0.1" />
      <stop offset="40%" style="stop-color:#fff;stop-opacity:0" />
    </linearGradient>
    <filter id="blur">
      <feGaussianBlur in="SourceGraphic" stdDeviation="2"/>
    </filter>
  </defs>
  <image width="121" height="121" filter="url(#blur)" xlink:href="data:image/jpeg;base64,
  /9j/4AAQSkZJRgABAQEASABIAAD/2wBDACAWGBwYFCAcGhwkIiAmMFA0MCwsMGJGSjpQdGZ6eHJm
  cG6AkLicgIiuim5woNqirr7EztDOfJri8uDI8LjKzsb/2wBDASIkJDAqMF40NF7GhHCExsbGxsbG
  xsbGxsbGxsbGxsbGxsbGxsbGxsbGxsbGxsbGxsbGxsbGxsbGxsbGxsbGxsb/wgARCAB5AHkDASEA
  AhEBAxEB/8QAGQAAAwEBAQAAAAAAAAAAAAAAAAECBAMF/8QAGAEAAwEBAAAAAAAAAAAAAAAAAAEC
  AwT/2gAMAwEAAhADEAAAAfQAXAM9O7YlzoXdLQ5QAIMSL6gA0DS50G6UyRYUyi2NBQhoHMMNzzM2
  VX0BgwKQqSHJDWvTk/McagAMC0TcBUoA9LM8x49ACBjNJlawIlgl0kh8/SIAAekwbYgJiSEUc3WA
  AIdRBrgAhggLOfsAGxVc5xFc6WiBgN08O0AdKbqM551lKuBUjpV1OXWNN0oqohQ84V5pUr3aac8u
  fQ3FOpmnMKXEzWSVLX322WVXD59aamnMEkTNZzehre+ogzLn0p5lEyJzMvN6emmXQAuSIrlunmKX
  E9OhdHswAAAJzQ+tcbnnqtFdSAAD/8QAIBAAAgICAwADAQAAAAAAAAAAAQIAEQMwEBIgIjFAIf/a
  AAgBAQABBQLlsoE+TQIJ1EoTqIUE+SxcoPt3LQLWhluJkKnxkfsR/NRFzG/U8ZWoLsaYXsRj2fah
  6vcG4zv+ipX4CPwH30jCm2qLapkW92NaHDLWxFvyVrUFv2U0BdJ+oODwPrz/AP/EABwRAQACAgMB
  AAAAAAAAAAAAAAEAEAIgETAxIf/aAAgBAwEBPwGvN/Nzox87Hod2O+T8nO+Ud2NkPKYxvHyYNNMa
  Ji8OjGB9sbYwNOegp0//xAAfEQABBAMAAwEAAAAAAAAAAAABAAIRIBAwMQMSIUH/2gAIAQIBAT8B
  pKI0BOEaD9Gk0CGX9oEMkTRugOheylTUoFTcUPajAT9DhIsz7l4irRAyRKc0jLGfpq/mPH2n/8QA
  HhAAAQQBBQAAAAAAAAAAAAAAEQEgITAQAAJAUHD/2gAIAQEABj8CzFEvCVDc0JYFyPADceljUvni
  /wD/xAAdEAADAAIDAQEAAAAAAAAAAAAAAREQMSAhQTBh/9oACAEBAAE/Ic9R2Y3vcR6iHh+A2+Hi
  6LrdR1PR8m0lWNfEVtvFLilwnTpnggTTVXBnhCpClKUpSlKKUd4+evbYkRSlKUpSlKUSq+nRvaxY
  ZSlKUpSlKUpSC/GTlSlKUpSlLi5VypRvnOcKn0QhBInWCEJyhMQglhBomJiFFREIQgkLDGhomZiJ
  JI2sQSIImGhog0Qh3DbzbVrMEuDRCYrr1waqjHa6FzYxz96EoouXp0O1oLgzt6R69vlPZrl7zv/a
  AAwDAQACAAMAAAAQCZ9GgAVrOID+MKOo0R0OMKN+ec1rZcb1FaGkEgox777+BDUwvvfOejgbCEVt
  p82ChkNz+AVXCzANstqAAEMAAP/EABoRAAMBAQEBAAAAAAAAAAAAAAABERAgITH/2gAIAQMBAT8Q
  Eq4eeENso1wlHa1j9Jj4SVrGXUokiEHh4iExjansPgb0pS8SwvLPQkZSixjwvurR6g+C8UeEHh8S
  RTAYx7W1ZDHhCS1OMVDGJc/XT//EABsRAQEBAQEBAQEAAAAAAAAAAAEAERAhMSBh/9oACAECAQE/
  EOHlsItTT9kstHnGIiODw4/eERZEMU6PAs4PrpyO+S3mz1vlttvdiWwXtvNtlzINvNlllDDDt5my
  ywyhvmGOyy2wwwwYcBZbYYYa7u/ktsMfjCGMz7w98s/0D9/J/8QAIxABAAICAgICAgMAAAAAAAAA
  AQARECExQSBRMGGhsXGBkf/aAAgBAQABPxDCgWxl/q4naJ0QW2rDhCfVnIGK21QfaF0xz/bgiWeL
  pKCIXTuzfbRYZLyX7mygIbujDSWOVotlzdeX3KUc/EAKA8y1W3DBssxuGW2eX4AL4dpnCbP68Khw
  NHixgcD4sUjkpn3zhfcvwBJDDgcV4K6rkl/UVS5cuXLhDpgtwMuEduFeFSmWl1yKOZUqVKm5WKlS
  sCCbXiB6Sh4jLgrwrJULQ6E6IFFZVisKw/mjdRdmQgjsglQalmFiokfqrtn1zQkAvwAwiomBwGGk
  1BgSymPWb/iBAhgBKlYGGEiCWv5gUUZJgsY7e36ylagQIEqJEggqXoV+8IgoPFBKYS229RtpD7jH
  hIYYg5SFtM/cMbbeoFFHwc04MnGHKcXl/9k=" clip-path="url(#circ)" />
  <g transform="translate(60.5,60.5)">
    <path d="M0 0A56 56 0 0 0 0 56 56 56 0 0 0 32.916 45.305 56 56 0 0 1 0 0 56
        56 0 0 0 53.259 17.305 56 56 0 0 0 53.259-17.305 56 56 0 0 1 0 0 56 56
        0 0 0 32.916-45.305 56 56 0 0 0 0-56 56 56 0 0 1 0 0 56 56 0 0 0
        -32.916-45.305 56 56 0 0 0-53.259-17.305 56 56 0 0 1 0 0 56 56 0 0 0
        -53.259 17.305 56 56 0 0 0-32.916 45.305 56 56 0 0 1 0 0Z"
        stroke="none" fill="#000" opacity="0.25" transform="rotate(0)">
      <animateTransform attributeName="transform" type="rotate" from="0"
          to="72" begin="0s" dur="0.6s" repeatCount="indefinite" />
    </path>
    <circle r="59" stroke="#000" stroke-width="2" fill="none" opacity="0.25" />
    <circle r="55" fill="url(#shine)" stroke="none" />
  </g>
</svg>

这篇关于圆形加载动画的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！