Css3动画垂直

Question

我想使用这段代码，但我希望动画是垂直的。

header {
    width: 100%;
    height: 150px;
    background-image: url(http://www.scottishheritageusa.org/imgs/header_separator.png); //replace with your image
    background-position: 0px;
    background-repeat: repeat-x;
    -webkit-animation: myanim 5s infinite linear;
       -moz-animation: myanim 5s infinite linear;
         -o-animation: myanim 5s infinite linear;
            animation: myanim 5s infinite linear;
}

@-webkit-keyframes myanim {
    0%   { background-position: 0px; }
    100% { background-position: 100px; } /* set this to the width of the image */
}
@-moz-keyframes myanim {
    0%   { background-position: 0px; }
    100% { background-position: 100px; } /* set this to the width of the image */
}
@-o-keyframes myanim {
    0%   { background-position: 0px; }
    100% { background-position: 100px; } /* set this to the width of the image */
}
@keyframes myanim {
    0%   { background-position: 0px; }
    100% { background-position: 100px; } /* set this to the width of the image */
}

我在这里找到了这段代码:http://jsfiddle.net/e3WLD/3/

感谢帮助

Answer 1

背景位置接受两个参数:

• 第一个用于水平定位
• 第二个用于垂直定位

More info on background-position on W3schools

因此，通过向 background-position 属性添加第二个参数，您可以垂直动画你的背景。

我编辑了你的 JSFiddle

对此:

header {
width: 100%;
height: 131px;
background-image: url(http://www.scottishheritageusa.org/imgs/header_separator.png);
background-position: 0px 0px;
background-repeat: repeat-y;
-webkit-animation: myanim 5s infinite linear;
   -moz-animation: myanim 5s infinite linear;
     -o-animation: myanim 5s infinite linear;
        animation: myanim 5s infinite linear;
}

@-webkit-keyframes myanim {
  0%   { background-position: 0px; }
  100% { background-position: 0px 1000px; } /* set this to the width of the image */
}
@-moz-keyframes myanim {
  0%   { background-position: 0px; }
  100% { background-position: 0px 1000px; } /* set this to the width of the image */
}
@-o-keyframes myanim {
  0%   { background-position: 0px; }
  100% { background-position: 1000px; } /* set this to the width of the image */
}
@keyframes myanim {
  0%   { background-position: 0px; }
  100% { background-position: 0px 1000px; } /* set this to the width of the image */
}