之前接了几个微信里的项目,类似电子邀请函,什么分析报告这样的项目, 对css3动画要求十分高,每个页面客户几乎都有天马行空的想法,或者说设计师有这样的想法。
众所周知css3里的keyframe写好了就不能赋值复用的, 所以怎样能把keyframe通用起来就异常关键了。
好,下面先上几个之前写的项目:(今天sae挂了 ,只好用别人的生产地址),手机打开或者chrome模拟看哦!
http://www.51qianlima.cn/bim/
http://wx.mgcc.com.cn/fotile/invite/index.html?leader=2&from=timeline&isappinstalled=0
仔细看你就发现页面的动画有渐显,有飞入,而且可能2者或多者同时存在。
那么问题来了:是不是每个页面的keyframe都得单独写?
在说这个问题之前,你可能得掌握几种常用的水平居中,垂直居中,中心居中;水平偏移,垂直偏移的写法(以下demo效果请chrome模拟手机端打开,-webkit内核哦)。
demo1:postion结合margin:auto
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no,minimal-ui">
<title></title>
<style>
* {
padding:0;
margin:0;
}
html,body {
height:100%;
}
.demo {
width:100px;
height: 100px;
text-align: center;
line-height: 100px;
background:lightblue;
}
.demo-1 {
position: absolute;
margin:0 auto;
left:0;
right:0;
}
.demo-2 {
position: absolute;
margin:auto 0;
top:0;
bottom:0;
}
.demo-3 {
position: absolute;
margin:auto;
top:0;
bottom:0;
left:0;
right:0;
}
</style>
</head>
<body>
<div class="demo demo-1">水平居中</div>
<div class="demo demo-2">垂直居中</div>
<div class="demo demo-3">中心居中</div>
</body>
</html>
demo2:postion和translate 一起使用达到水平、垂直居中
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no,minimal-ui">
<title></title>
<style>
* {
padding:0;
margin:0;
}
html,body {
height:100%;
}
.demo {
width:100px;
height: 100px;
text-align: center;
line-height: 100px;
background:peachpuff;
}
.demo-1 {
position: absolute;
left:50%;
-webkit-transform:translateX(-50%);
}
.demo-2 {
position: absolute;
top:50%;
-webkit-transform:translateY(-50%);
}
.demo-3 {
position: absolute;
top:50%;
left:50%;
-webkit-transform:translateX(-50%) translateY(-50%);
}
</style>
</head>
<body>
<div class="demo demo-1">水平居中</div>
<div class="demo demo-2">垂直居中</div>
<div class="demo demo-3">中心居中</div>
</body>
</html>
好 掌握了以上2个demo的写法和区别后,正在的项目上 ,往往用到的是根据水平中心点,或者垂直中心点偏移的写法,因为手机屏幕大小不一,所以这个写法异常常用。
demo3:中心点偏移
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no,minimal-ui">
<title></title>
<style>
* {
padding:0;
margin:0;
}
html,body {
height:100%;
}
.demo {
width:100px;
height: 100px;
text-align: center;
background:lightblue;
}
.demo-1 {
position: absolute;
margin: 0 auto;
left: -88px;
right: 0;
}
.demo-2 {
position: absolute;
margin: auto 0;
top: -30px;
bottom: 0;
} body:before {
content: '';
width: 100%;
border-bottom: 2px dotted blue;
position: absolute;
top: 50%;
-webkit-transform: translateY(-2px);
} body:after {
content: '';
height: 100%;
border-left: 2px dotted blue;
position: absolute;
left: 50%;
-webkit-transform: translateX(2px);
} </style>
</head>
<body><div class="demo demo-1">水平 距离偏移</div>
<div class="demo demo-2">垂直 距离偏移</div></body>
</html>
行 掌握后接下来可以为写通用动画作铺垫了(主要是飞入效果)
如果单纯渐显的话,咱们只需要控制opacity 就可以达到了:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no,minimal-ui">
<title></title>
<style>
* {
padding:0;
margin:0;
}
html,body {
height:100%;
}
.demo {
width:100px;
height: 100px;
text-align: center;
line-height: 100px;
background:lightblue;
opacity: 0;
}
.demo-1 {
position: absolute;
margin:0 auto;
left:0;
right:0;
-webkit-animation:.8s ease opacity_kf 0s forwards;
}
.demo-2 {
position: absolute;
margin:auto 0;
top:0;
bottom:0;
-webkit-animation:.8s ease opacity_kf .8s forwards;
}
.demo-3 {
position: absolute;
margin:auto;
top:0;
bottom:0;
left:0;
right:0;
-webkit-animation:.8s ease opacity_kf 1.6s forwards;
} @-webkit-keyframes opacity_kf {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
</style>
</head>
<body>
<div class="demo demo-1">水平居中</div>
<div class="demo demo-2">垂直居中</div>
<div class="demo demo-3">中心居中</div>
</body>
</html>
扯了这么多 ,主角来了,就是飞入也分2种写法,一种就是每个飞入效果是一个width:100%;height:100%;的层,然后操作是整个层translate,XY;但是这样写有一个很不方便就是审查元素的时候,放大镜只能定位到一个层上(多个飞入动画,别的层就给盖住了)
demo如下:
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no,minimal-ui">
<title></title>
<style>
* {
padding:0;
margin:0;
}
html,body {
height:100%;
}
.demo {
width:100px;
height: 100px;
text-align: center;
line-height: 100px;
background:lightblue;
}
.demo-1 {
position: absolute;
margin:0 auto;
left:0;
right:0;
}
.demo-2 {
position: absolute;
margin:auto 0;
top:0;
bottom:0; }
.demo-3 {
position: absolute;
margin:auto;
top:0;
bottom:0;
left:0;
right:0;
} @-webkit-keyframes translate_kf {
0% {
-webkit-transform:translateX(100%);
}
100% {
-webkit-transform:translateX(0);
}
} .demo-1-ani {
-webkit-animation:.8s ease translate_kf 0s forwards;
}
.demo-2-ani {
-webkit-animation:.8s ease translate_kf .8s forwards;
}
.demo-3-ani {
-webkit-animation:.8s ease translate_kf 1.6s forwards;
} .translate-wrap {
width:100%;
height:100%;
-webkit-transform:translateX(100%);
position:absolute;
}
</style>
</head>
<body>
<div class="translate-wrap demo-1-ani">
<div class="demo demo-1">水平居中</div>
</div>
<div class="translate-wrap demo-2-ani">
<div class="demo demo-2">垂直居中</div>
</div>
<div class="translate-wrap demo-3-ani">
<div class="demo demo-3">中心居中</div>
</div></body>
</html>
但是如果换一个写法,就是translate的包裹器里面的节点top和left都写了定值,那么外面动画的包裹器其实是不占文档流的
然后我们只需要操作这个不占文档流的容器就可以了
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no,minimal-ui">
<title></title>
<style>
* {
padding:0;
margin:0;
}
html,body {
height:100%;
}
.demo {
width:100px;
height: 100px;
text-align: center;
line-height: 100px;
background:lightblue;
}
.demo-1 {
position: absolute;
left:0;
right:0;
}
.demo-2 {
position: absolute;
top:150px; }
.demo-3 {
position: absolute;
top:300px;
left:100px;
} @-webkit-keyframes translate_kf {
0% {
-webkit-transform:translateX(100%);
}
100% {
-webkit-transform:translateX(0);
}
} .demo-1-ani {
-webkit-animation:.8s ease translate_kf 0s forwards;
}
.demo-2-ani {
-webkit-animation:.8s ease translate_kf .8s forwards;
}
.demo-3-ani {
-webkit-animation:.8s ease translate_kf 1.6s forwards;
} .translate-wrap {
width:100%;
-webkit-transform:translateX(100%);
position:absolute;
}
</style>
</head>
<body>
<div class="translate-wrap demo-1-ani">
<div class="demo demo-1">水平居中</div>
</div>
<div class="translate-wrap demo-2-ani">
<div class="demo demo-2">垂直居中</div>
</div>
<div class="translate-wrap demo-3-ani">
<div class="demo demo-3">中心居中</div>
</div></body>
</html>
最后提一点 如果同时用到渐显和飞入,只需要设置好几个间隔一致的class就能很简单的混合使用了,例如有10个控制渐显的动画,和5个控制飞入的动画
.word_1 {
opacity:;
-webkit-animation:.8s ease word_1_kf .5s forwards;
}
.word_2 {
opacity:;
-webkit-animation:.8s ease word_1_kf 1.3s forwards;
}
.word_3 {
opacity:;
-webkit-animation:.8s ease word_1_kf 2.1s forwards;
}
.word_4 {
opacity:;
-webkit-animation:.8s ease word_1_kf 2.9s forwards;
}
.word_5 {
opacity:;
-webkit-animation:.8s ease word_1_kf 3.7s forwards;
}
.word_6 {
opacity:;
-webkit-animation:.8s ease word_1_kf 4.5s forwards;
}
.word_7 {
opacity:;
-webkit-animation:.8s ease word_1_kf 5.3s forwards;
}
.word_8 {
opacity:;
-webkit-animation:.8s ease word_1_kf 6.1s forwards;
}
.word_9 {
opacity:;
-webkit-animation:.8s ease word_1_kf 6.9s forwards;
}
.word_10 {
opacity:;
-webkit-animation:.8s ease word_1_kf 7.7s forwards;
}/********************** 左边动画 start ********************************/
.translateX_animation_left_1 {
-webkit-transform: translateX(-100%);
-webkit-animation: .8s ease translateX_1_left_kf forwards .5s;
}
.translateX_animation_left_2 {
-webkit-transform: translateX(-100%);
-webkit-animation: .8s ease translateX_1_left_kf forwards 1.3s;
}
.translateX_animation_left_3 {
-webkit-transform: translateX(-100%);
-webkit-animation: .8s ease translateX_1_left_kf forwards 2.1s;
}
@-webkit-keyframes translateX_1_left_kf {
0% {
-webkit-transform: translateX(-100%);
}
100% {
-webkit-transform: translateX(0);
}
}
/********************** 左边动画 end ********************************/
/********************** 右边动画 start ********************************/
.translateX_animation_right_1 {
-webkit-transform: translateX(-100%);
-webkit-animation: .8s ease translateX_1_right_kf .5 forwards;
}
.translateX_animation_right_2 {
-webkit-transform: translateX(100%);
-webkit-animation: .8s ease translateX_1_right_kf forwards 1.3s;
}.translateX_animation_right_3 {
-webkit-transform: translateX(100%);
-webkit-animation: .8s ease translateX_1_right_kf forwards 2.1s;
}
.translateX_animation_right_4 {
-webkit-transform: translateX(100%);
-webkit-animation: .8s ease translateX_1_right_kf forwards 2.9s;
}
.translateX_animation_right_5 {
-webkit-transform: translateX(100%);
-webkit-animation: .8s ease translateX_1_right_kf forwards 3.7s;
}
@-webkit-keyframes translateX_1_right_kf {
0% {
-webkit-transform: translateX(100%);
}
100% {
-webkit-transform: translateX(0);
}
}
/********************** 右边动画 end ********************************/
word_1后可以随意执行 translateX_animation_right_2 或者 translateX_animation_left_2 ,然后word_3神马的。
好,暂时遇到的项目只用到了渐显和飞入,这2个常用的通用动画,小伙伴们有更多的实际场景欢迎交流,写得不好的地方也欢迎吐槽,谢谢看完 谢谢谢谢。