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Home  >  Article  >  Web Front-end  >  Summary analysis of css3 animation effects

Summary analysis of css3 animation effects

高洛峰
高洛峰Original
2017-03-22 14:51:262096browse

There are three animation functions of css3:

1. transition (transition attribute)
2. animation (animation attribute)
3. transform (2D/3D conversion attribute)

The following will introduce my understanding one by one:

1. transition:

For example, -webkit-transition:color 1s;

is equivalent to:

-webkit-transition-property:color;

-webkit-transition-duration:1s;

The transition effect of multiple attributes can be written like this:

Method 1:-webkit-transition:

Method 2:

-webkit-transition:

-webkit-transition:

transition-timing-function attribute values ​​have 5 values:

ease: start slowly, end slowly

liner: uniform

ease- in: slow start

ease-out: slow end

ease-in-out: slow start, slow end (slightly different from ease)

Example:
transition transition effect

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>transition过渡效果</title>
    <style>
        *{   
            margin: 0px;   
            padding: 0px;   
        }   
        #box{   
            width: 200px;   
            height: 200px;   
            background-color: chocolate;   
            position: relative;   
            left: 0px;   
            top: 0px;   
            transition: top 5s ease,left 5s ease ;   
            -moz-transition: top 5s ease,left 5s ease ; /* Firefox 4 */   
            -webkit-transition: top 5s ease,left 5s ease ; /* Safari and Chrome */   
            -o-transition: top 5s ease,left 5s ease ; /* Opera */   
        }   
        .btn{   
            width: 512px;   
            margin: 0 auto;   
            border: 2px solid #e3e3e3;   
            border-radius: 5px;   
            padding: 10px;   

        }   
        .btn button{   
            width: 80px;   
            height: 40px;   
            text-align: center;   
            line-height: 40px;   
            margin-right: 20px;   
        }   
        button:last-child{   
            margin-right: 0px;   
        }   
    </style>
    <script>
        window.onload=function(){   
            var e1 = document.getElementById("e1");   
            var e2 = document.getElementById("e2");   
            var e3 = document.getElementById("e3");   
            var e4 = document.getElementById("e4");   
            var e5 = document.getElementById("e5");   
            var box = document.getElementById("box");   
            e1.onclick=function(){   
                box.style.left = 1000+"px";   
                box.style.top = 100+"px";   
                box.style.transitionTimingFunction="ease";   
            };   
            e2.onclick=function(){   
                box.style.right = 0+"px";   
                box.style.top = 0+"px";   
                box.style.transitionTimingFunction="liner";   
            };   
            e3.onclick=function(){   
                box.style.right = 1000+"px";   
                box.style.top = 100+"px";   
                box.style.transitionTimingFunction="ease-in";   
            };   
            e4.onclick=function(){   
                box.style.left = 0+"px";   
                box.style.top = 0+"px";   
                box.style.transitionTimingFunction="ease-out";   
            };   
            e5.onclick=function(){   
                box.style.left = 1000+"px";   
                box.style.top = 100+"px";   
                box.style.transitionTimingFunction="ease-in-out";   
            };   

        }   
    </script>
</head>
<body>
    <p id="box"></p>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <hr>
    <br>
    <br>
    <br>
    <p class="btn">
        <button id="e1">ease</button>
        <button id="e2">liner</button>
        <button id="e3">ease-in</button>
        <button id="e4">ease-out</button>
        <button id="e5">ease-in-out</button>
    </p>
</body>
</html>

2. Animation attribute animation

animation: name duration timing-function delay iteration-count direction;

Value

Description
##animation-name

 #Specifies the keyframe name that needs to be bound to the selector. .

animation-duration

 Specifies the time it takes to complete the animation, in seconds or milliseconds.

animation-timing-function

 Specifies the speed curve of animation.

animation-delay

 Specifies the delay before the animation starts.

animation-iteration-count

 Specifies the number of times the animation should be played.

animation-direction

 Specifies whether the animation should be played in reverse in turn.

Note: Internet Explorer 9 and earlier does not support the animation property.

@keyframes animationname {keyframes-selector {css-styles;}}

##animationnamekeyframes-selector
##value

 Description

Required. Defines the name of the animation.

Required. The percentage of animation duration. 		Legal values:

##0-100%

  • ##from (same as 0%)

  • to (same as 100%)

##css-styles

Required. One or more legal CSS style properties.

以百分比来规定改变发生的时间，或者通过关键词 "from" 和 "to"，等价于 0% 和 100%。

0% 是动画的开始时间，100% 动画的结束时间。

例如：

　　animation:mymove 5s infinite;   

　　@keyframes mymove{   

　　　　from{ top:0px; }   

　　　　to{ top:200px; }   

　　}

还可以这么写：

　　@keyframes mymove{   

　　　　0%{ top:0px; }   

　　　　25%{ top:200px; }   

　　　　50%{ top:100px; }   

　　　　75%{ top:200px; }   

　　　　100%{ top:0px; }   

　　}

 案例：
css3的animation效果

<!DOCTYPE html>
<html>
<head>
<style>
p   
{   
width:100px;   
height:100px;   
background:red;   
position:relative;   
animation:mymove 5s infinite;   
-moz-animation:mymove 5s infinite; /* Firefox */   
-webkit-animation:mymove 5s infinite; /* Safari and Chrome */   
-o-animation:mymove 5s infinite; /* Opera */   
}   

@keyframes mymove   
{   
from {top:0px;}   
to {top:200px;}   
}   

@-moz-keyframes mymove /* Firefox */   
{   
from {top:0px;}   
to {top:200px;}   
}   

@-webkit-keyframes mymove /* Safari and Chrome */   
{   
from {top:0px;}   
to {top:200px;}   
}   

@-o-keyframes mymove /* Opera */   
{   
from {top:0px;}   
to {top:200px;}   
}   
</style>
</head>
<body>

<p><b>注释：</b>本例在 Internet Explorer 中无效。</p>

<p></p>

</body>
</html>

3、设置3D场景（即transform）

-webkit-perspective:800;(单位为像素)--即三维物体距离屏幕的距离。

-webkit-perspective-origin:50% 50%;(这个属性代表了人眼观察的视野。50% 50%为X轴、Y轴相应的位置，即屏幕的正中央。) 　　Summary analysis of css3 animation effects

使用transform属性调整元素：-webkit-transform-style:-webkit-perserve-3d;(这个属性是告诉浏览器我们是在一个三维空间中对元素进行操作)

(1)、translate(移动距离)

　　　　translateX（x px）

　　　　translateY（y px）

　　　　translateZ（z px）

(2)、rotate(旋转角度)

　　　　rotateX(x deg)

　　　　rotateY(y deg)

　　　　rotateZ(z deg)

 　　Summary analysis of css3 animation effects

transform：rotate（45deg）

rotateX:向屏幕上边沿向内旋转为正方向。

rotateY:向屏幕竖直向下为正方向。

rotateZ:向屏幕外为正方向。

一个p块，右边沿向屏幕内旋转45deg,即应设置为：Transform：rotateY（45deg）。

实例：

transform3D转换效果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>transform3D转换效果</title>
    <style>
        *{   
            margin: 0px;   
            padding: 0px;   
        }   
        #box{   
            width: 200px;   
            height: 200px;   
            background-color: chocolate;   
            position: relative;   
            left: 0px;   
            top: 0px;   
            perspective:800px;   
            perspective-origin:50% 50%;   
            transform-style: preserve-3d;   
            transform-origin:0% 100%;//以Y轴为旋转中心   
        }   
        p{   
            margin:20px 520px;   
        }   
        .btn{   
            width: 300px;   
            margin: 0 auto;   
            border: 2px solid #e3e3e3;   
            border-radius: 5px;   
            padding: 10px;   

        }   
        .btn button{   
            width: 80px;   
            height: 40px;   
            text-align: center;   
            line-height: 40px;   
            margin-right: 20px;   
        }   
        button:last-child{   
            margin-right: 0px;   
        }   
    </style>
    <script>
        window.onload=function(){   
            var tx = document.getElementById("tx");   
            var ty = document.getElementById("ty");   
            var tz = document.getElementById("tz");   
            var rx = document.getElementById("rx");   
            var ry = document.getElementById("ry");   
            var rz = document.getElementById("rz");   
            var box = document.getElementById("box");   
            tx.onclick=function(){   
                box.style.transform = "translateX(500px)";   
            };   
            ty.onclick=function(){   
                box.style.transform = "translateY(400px)"
            };   
            rx.onclick=function(){   
                box.style.transform = "rotateX(30deg)"
            };   
            ry.onclick=function(){   
                box.style.transform = "rotateY(30deg)"
            };   
            rz.onclick=function(){   
                box.style.transform = "rotateZ(30deg)"
            };   
        }   
    </script>
</head>
<body>
    <p id="box"></p>
    <br>
    <br>
    <br>
    <br>
    <br>
    <br>
    <hr>
    <br>
    <br>
    <br>
    <p>translate(移动距离)</p>
    <p class="btn">
        <button id="tx">translateX</button>
        <button id="ty">translateY</button>
    </p>
    <p>rotate(旋转角度)</p>
    <p class="btn">
        <button id="rx">rotateX</button>
        <button id="ry">rotateY</button>
        <button id="rz">rotateZ</button>
    </p>
</body>
</html>

使用transform-origin属性调整旋转中心。默认旋转中心点为p盒子的正中心。

这个旋转中心是可以改变的：

　　　　X轴：left、center、right.

　　　　Y轴：top、center、bottom.

　　　　Z轴：length px(一个长度值)。

以上这篇css3动画效果小结(推荐)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持PHP中文网。

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