纯SVG实现的Loading动画，拿走不谢

话不多说，直接上代码。

（ 到这里看效果： http://www.var6.cn/work/1/22/MD的编程作品 ）

第一个：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="30px" height="30px" viewBox="0 0 40 40" enable-background="new 0 0 40 40" xml:space="preserve">
  <path opacity="0.2" fill="#FF6700" d="M20.201,5.169c-8.254,0-14.946,6.692-14.946,14.946c0,8.255,6.692,14.946,14.946,14.946
      s14.946-6.691,14.946-14.946C35.146,11.861,28.455,5.169,20.201,5.169z M20.201,31.749c-6.425,0-11.634-5.208-11.634-11.634
      c0-6.425,5.209-11.634,11.634-11.634c6.425,0,11.633,5.209,11.633,11.634C31.834,26.541,26.626,31.749,20.201,31.749z">path>
  <path fill="#FF6700" d="M26.013,10.047l1.654-2.866c-2.198-1.272-4.743-2.012-7.466-2.012h0v3.312h0
      C22.32,8.481,24.301,9.057,26.013,10.047z" transform="rotate(42.1171 20 20)">
      <animateTransform attributeType="xml" attributeName="transform" type="rotate" from="0 20 20" to="360 20 20" dur="0.5s" repeatCount="indefinite">animateTransform>
  path>
svg>

第二个

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="30px" height="30px" viewBox="0 0 50 50" style="enable-background:new 0 0 50 50" xml:space="preserve">
    <path fill="#FF6700" d="M25.251,6.461c-10.318,0-18.683,8.365-18.683,18.683h4.068c0-8.071,6.543-14.615,14.615-14.615V6.461z" transform="rotate(275.098 25 25)">
        <animateTransform attributeType="xml" attributeName="transform" type="rotate" from="0 25 25" to="360 25 25" dur="0.6s" repeatCount="indefinite">animateTransform>
    path>
svg>

第三个：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="30px" height="30px" viewBox="0 0 50 50" style="enable-background:new 0 0 50 50" xml:space="preserve">
    <path fill="#FF6700" d="M43.935,25.145c0-10.318-8.364-18.683-18.683-18.683c-10.318,0-18.683,8.365-18.683,18.683h4.068c0-8.071,6.543-14.615,14.615-14.615c8.072,0,14.615,6.543,14.615,14.615H43.935z" transform="rotate(275.098 25 25)">
        <animateTransform attributeType="xml" attributeName="transform" type="rotate" from="0 25 25" to="360 25 25" dur="0.6s" repeatCount="indefinite">animateTransform>
    path>
svg>

第四个：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="30px" height="30px" viewBox="0 0 24 24" style="enable-background:new 0 0 50 50" xml:space="preserve">
   <rect x="0" y="0" width="4" height="7" fill="#FF6700" transform="scale(1 1.94336)">
       <animateTransform attributeType="xml" attributeName="transform" type="scale" values="1,1; 1,3; 1,1" begin="0s" dur="0.6s" repeatCount="indefinite">animateTransform>       
   rect>
   <rect x="10" y="0" width="4" height="7" fill="#FF6700" transform="scale(1 2.72331)">
       <animateTransform attributeType="xml" attributeName="transform" type="scale" values="1,1; 1,3; 1,1" begin="0.2s" dur="0.6s" repeatCount="indefinite">animateTransform>       
   rect>
   <rect x="20" y="0" width="4" height="7" fill="#FF6700" transform="scale(1 1.38997)">
       <animateTransform attributeType="xml" attributeName="transform" type="scale" values="1,1; 1,3; 1,1" begin="0.4s" dur="0.6s" repeatCount="indefinite">animateTransform>       
   rect>
svg>

第五个：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="24px" height="30px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50" xml:space="preserve">
    <rect x="0" y="0" width="4" height="10" fill="#FF6700" transform="translate(0 9.4336)">
        <animateTransform attributeType="xml" attributeName="transform" type="translate" values="0 0; 0 20; 0 0" begin="0" dur="0.6s" repeatCount="indefinite">animateTransform>
    rect>
    <rect x="10" y="0" width="4" height="10" fill="#FF6700" transform="translate(0 17.2331)">
        <animateTransform attributeType="xml" attributeName="transform" type="translate" values="0 0; 0 20; 0 0" begin="0.2s" dur="0.6s" repeatCount="indefinite">animateTransform>
    rect>
    <rect x="20" y="0" width="4" height="10" fill="#FF6700" transform="translate(0 3.89973)">
        <animateTransform attributeType="xml" attributeName="transform" type="translate" values="0 0; 0 20; 0 0" begin="0.4s" dur="0.6s" repeatCount="indefinite">animateTransform>
    rect>
svg>

第六个：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="24px" height="30px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50" xml:space="preserve">
    <rect x="0" y="9.22656" width="4" height="12.5469" fill="#FF6700">
        <animate attributeName="height" attributeType="XML" values="5;21;5" begin="0s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="y" attributeType="XML" values="13; 5; 13" begin="0s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
    <rect x="10" y="5.22656" width="4" height="20.5469" fill="#FF6700">
        <animate attributeName="height" attributeType="XML" values="5;21;5" begin="0.15s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="y" attributeType="XML" values="13; 5; 13" begin="0.15s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
    <rect x="20" y="8.77344" width="4" height="13.4531" fill="#FF6700">
        <animate attributeName="height" attributeType="XML" values="5;21;5" begin="0.3s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="y" attributeType="XML" values="13; 5; 13" begin="0.3s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
svg>

第七个：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="48px" height="60px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50" xml:space="preserve">
    <rect x="0" y="0" width="4" height="20" fill="#FF6700">
        <animate attributeName="opacity" attributeType="XML" values="1; .2; 1" begin="0s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
    <rect x="7" y="0" width="4" height="20" fill="#FF6700">
        <animate attributeName="opacity" attributeType="XML" values="1; .2; 1" begin="0.2s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
    <rect x="14" y="0" width="4" height="20" fill="#FF6700">
        <animate attributeName="opacity" attributeType="XML" values="1; .2; 1" begin="0.4s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
svg>

第八个：

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="48px" height="60px" viewBox="0 0 24 30" style="enable-background:new 0 0 50 50" xml:space="preserve">
    <rect x="0" y="7.6416" width="4" height="14.7168" fill="#FF6700" opacity="0.2">
        <animate attributeName="opacity" attributeType="XML" values="0.2; 1; .2" begin="0s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="height" attributeType="XML" values="10; 20; 10" begin="0s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="y" attributeType="XML" values="10; 5; 10" begin="0s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
    <rect x="8" y="5.1416" width="4" height="19.7168" fill="#FF6700" opacity="0.2">
        <animate attributeName="opacity" attributeType="XML" values="0.2; 1; .2" begin="0.15s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="height" attributeType="XML" values="10; 20; 10" begin="0.15s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="y" attributeType="XML" values="10; 5; 10" begin="0.15s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
    <rect x="16" y="7.3584" width="4" height="15.2832" fill="#FF6700" opacity="0.2">
        <animate attributeName="opacity" attributeType="XML" values="0.2; 1; .2" begin="0.3s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="height" attributeType="XML" values="10; 20; 10" begin="0.3s" dur="0.6s" repeatCount="indefinite">animate>
        <animate attributeName="y" attributeType="XML" values="10; 5; 10" begin="0.3s" dur="0.6s" repeatCount="indefinite">animate>
    rect>
svg>