Mobile Web 前端开发 CSS动画经验分享_html/css

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Mobile Web 前端开发 CSS动画经验分享_html/css_WEB-ITnose

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Jun 24, 2016 am 11:53 AM

谈到动画作用。CSS动画是Mobilweb开发的利器，CSS动画不得不谈。受限于Mobil设备功能等疑问，PC上的动画完结计划在Mobil上大都行不通，幸运的Mobil上我能够用CSS动画，今日我就来了解一下CSS动画的3个首要成员。

CSS改换（Transit

transit默许的突变动画。当CSS特点改动的时分，界说好需求改换的CSS特点。transit动画被触发。可是并不是一切的CSS特点改动都会触发translat当前，并没有一个官方的文档列出来那些能够，那些不能够，可是能够经过一些小窍门来判别，像那些值是接连数值的特点，例如widthheighttopleftcoloropac都是能够的visibl不能够的尽管它值是数值类型的可是不是接连的

并且有很高的功能。transitiphon和Andriod平台上都能够运转。

能够经过CSS来界说transit也能够经过JavaScript来界说。运用起来十分简单。

1.界说Dom元素的transit特点（duratdelaitimefunction等）2.运用JavaScript改动Dom元素的CSS款式

如何，1.界说Dom元素的transit特点（duratdelaitimefunction等）2.运用JavaScript改动Dom元素的CSS款式

-webkit-transition-properti界说需求突变的特点-webkit-transition-dur界说动画时刻-webkit-transition-delai界说推迟时刻-webkit-transition-timing-funct界说贝赛尔曲线函数

-webkit-transition-properti能够界说详细的特点，-webkit-transition-properti界说需求突变的特点-webkit-transition-dur界说动画时刻-webkit-transition-delai界说推迟时刻-webkit-transition-timing-funct界说贝赛尔曲线函数

div.zoom-fad{-webkit-transition-property:-webkit-transform,div.zoom-fad{-webkit-transition-property:-webkit-transform,div.zoom-fad{-webkit-transition-property:-webkit-transform,opacity;-webkit-transition-duration:4s,2s;-webkit-transition-delay:2s,0;} 也能够把这些特点写在一行，

div.slid{-webkit-transition:opac500mease-out100ms;}

-webkit-transition-timing-funct能够界说动画的突变速度曲线，div.slid{-webkit-transition:opac500mease-out100ms;}

逐步慢下来，贝赛尔曲线函数为cubic-bezi0.25,eas默许。-webkit-transition-timing-funct既能够设置简称。0.1,0.25,1.0linear均速，贝赛尔曲线函数为cubic-bezi0.0,0.0,1.0,1.0ease-in渐入时加快，贝赛尔曲线函数为cubic-bezi0.42,0,1.0,1.0ease-out淡出时减速，贝赛尔曲线函数为cubic-bezi0,0,0.58,1.0ease-in-out加快然后减速，贝赛尔曲线函数为cubic-bezi0.42,0,0.58,1.0

也能够直接设置自个界说的贝赛尔曲线函数

transit完毕后会触发webkitTransitionEnd事情。能够运用addEventListen来增加事情监听器。

element.addEventListen'webkitTransitionEnd',element.addEventListen'webkitTransitionEnd',element.addEventListen'webkitTransitionEnd',functionevent{alert"Finishtransition";};

A nimat

transit运用起来很简单，很便利，可是如果你想自个控制每帧的改动，那transit就不能满意你这时分你需求运用animanim有如下特点，

-webkit-animation-nam指定关键帧称号（动画的称号）-webkit-animation-dur指定多少秒或毫秒的时刻才华完结动画-webkit-animation-timing-funct指定动画的速度曲线-webkit-animation-delai推迟开端动画-webkit-animation-iteration-count播映次数；默许：1能够界说为infinit无量）-webkit-animation-direct动画方向；默许：normal

与transit不一样的anim需求界说帧，-webkit-animation-nam指定关键帧称号（动画的称号）-webkit-animation-dur指定多少秒或毫秒的时刻才华完结动画-webkit-animation-timing-funct指定动画的速度曲线-webkit-animation-delai推迟开端动画-webkit-animation-iteration-count播映次数；默许：1能够界说为infinit无量）-webkit-animation-direct动画方向；默许：normal

@-webkit-keyframsquarePath{from{top:100px;left:100px;}to{top:0px;left:0px;}

用from代表开端的帧，@-webkit-keyframsquarePath{from{top:100px;left:100px;}to{top:0px;left:0px;}

@-webkit-keyframsquarePath{from{top:0px;left:0px;}25%{top:0px;left:100px;}50%{top:100px;left:100px;}75%{top:100px;left:0px;}100%{top:0px;left:0px;}

这样我能够界说一个完好的anim

.squareA nim{-webkit-animation-name:squarePath;-webkit-animation-duration:4s;-webkit-animation-timing-function:linear;-webkit-animation-iteration-count:infinite;}

也能够选用缩写，.squareA nim{-webkit-animation-name:squarePath;-webkit-animation-duration:4s;-webkit-animation-timing-function:linear;-webkit-animation-iteration-count:infinite;}

-webkit-animation:squarePath4slinear0infinite

当我界说好anim运用JavaScript把动画设置到元素上，-webkit-animation:squarePath4slinear0infinite

anim运转的时分会触发一系列事情。

webkitA nimationStart动画开端webkitA nimationIteration动画重复履行webkitA nimationEnd动画完毕

仍然能够监听这些事情。

Transform

transform首要是改动。变换，使…变形。本身并没有突变或许动画的作用，可是transform和transit联系能够完结很漂亮很强大的作用，常用特点首要有，

transform坐标系和文档流的坐标系不一样。位移

也就是说当元素transform时分并不会影响原有文档流。rotat旋转skew歪斜scale份额translat改动。

能够运用CSS操作transform

也能够运用JavaScript操作webkitTransform特点来设置或获取transform-20pxscale2rotat45degtranslat5px.

div.style.webkitTransform='rotateY10degtranslateX10px';

经过以上办法操作的字符串，div.style.webkitTransform='rotateY10degtranslateX10px';

vartheTransform=window.getComputedStyldiv.webkitTransform;varmatrix=newWebKitCSSMatrixtheTransform;

回来的matrix不只包含矩阵特点，还包含一些办法，让我能够设置transform,vartheTransform=window.getComputedStyldiv.webkitTransform;varmatrix=newWebKitCSSMatrixtheTransform;

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