css3中怎么实现一个垂直下拉动画菜单，相信很多没有经验的人对此束手无策，为此本文总结了问题出现的原因和解决方法，通过这篇文章希望你能解决这个问题。
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这里用ul构造了菜单的基本结构。
接下来就利用CSS3代码来实现菜单的下拉和动画效果。
CSS代码比较繁琐，这里我只是提供一些核心的CSS代码，完整的代码大家可以在文章最后下载学习。
这是鼠标滑过菜单项时的动画代码：
代码如下:
.mcd-menu li a i, .mcd-menu li a strong, .mcd-menu li a small {
position: relative;
transition: all 300ms linear;
-o-transition: all 300ms linear;
-ms-transition: all 300ms linear;
-moz-transition: all 300ms linear;
-webkit-transition: all 300ms linear;
}
.mcd-menu li:hover > a i {
opacity: 1;
-webkit-animation: moveFromTop 300ms ease-in-out;
-moz-animation: moveFromTop 300ms ease-in-out;
-ms-animation: moveFromTop 300ms ease-in-out;
-o-animation: moveFromTop 300ms ease-in-out;
animation: moveFromTop 300ms ease-in-out;
}
.mcd-menu li:hover a strong {
opacity: 1;
-webkit-animation: moveFromLeft 300ms ease-in-out;
-moz-animation: moveFromLeft 300ms ease-in-out;
-ms-animation: moveFromLeft 300ms ease-in-out;
-o-animation: moveFromLeft 300ms ease-in-out;
animation: moveFromLeft 300ms ease-in-out;
}
.mcd-menu li:hover a small {
opacity: 1;
-webkit-animation: moveFromRight 300ms ease-in-out;
-moz-animation: moveFromRight 300ms ease-in-out;
-ms-animation: moveFromRight 300ms ease-in-out;
-o-animation: moveFromRight 300ms ease-in-out;
animation: moveFromRight 300ms ease-in-out;
}</p>
<p>.mcd-menu li:hover > a {
color: #e67e22;
}
以下定义了鼠标滑过后文字图标滑过的动画，分别是从顶部划入，从左侧划入，从右侧划入：
代码如下:
@-webkit-keyframes moveFromTop {
from {
opacity: 0;
-webkit-transform: translateY(200%);
-moz-transform: translateY(200%);
-ms-transform: translateY(200%);
-o-transform: translateY(200%);
transform: translateY(200%);
}
to {
opacity: 1;
-webkit-transform: translateY(0%);
-moz-transform: translateY(0%);
-ms-transform: translateY(0%);
-o-transform: translateY(0%);
transform: translateY(0%);
}
}
@-webkit-keyframes moveFromLeft {
from {
opacity: 0;
-webkit-transform: translateX(200%);
-moz-transform: translateX(200%);
-ms-transform: translateX(200%);
-o-transform: translateX(200%);
transform: translateX(200%);
}
to {
opacity: 1;
-webkit-transform: translateX(0%);
-moz-transform: translateX(0%);
-ms-transform: translateX(0%);
-o-transform: translateX(0%);
transform: translateX(0%);
}
}
@-webkit-keyframes moveFromRight {
from {
opacity: 0;
-webkit-transform: translateX(-200%);
-moz-transform: translateX(-200%);
-ms-transform: translateX(-200%);
-o-transform: translateX(-200%);
transform: translateX(-200%);
}
to {
opacity: 1;
-webkit-transform: translateX(0%);
-moz-transform: translateX(0%);
-ms-transform: translateX(0%);
-o-transform: translateX(0%);
transform: translateX(0%);
}
}
看完上述内容，你们掌握css3中怎么实现一个垂直下拉动画菜单的方法了吗？如果还想学到更多技能或想了解更多相关内容，欢迎关注编程网行业资讯频道，感谢各位的阅读！
