[Html5基础训练]animation的step使用方法

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Sprite Demo</title>
    <style>
      #an {
        width: 128px;
        height: 128px;
        background: url(img/spriteB.png);        
        animation: move infinite 4s steps(8,end);
      }
      /* -254，-384  x-1152  1024-128=    896 */
      @keyframes move {
        0% {
          background-position:0 -256px;
        }
        50% {
          background-position:-1024px -256px;
        } 
        50.001% {
          background-position:0 -384px;
        }
        100% {
          background-position:-1024px -384px;
        }        
        
      }
    </style>
  </head>
  <body>
    <div id="an"></div>
  </body>
</html>

SpriteB图片下载: