Home > Article > Web Front-end > CSS3 animation implements frame-by-frame animation effect example introduction
CSS3 animation implements frame-by-frame animation effect example introduction
- 高洛峰Original
- 2017-03-09 17:11:001522browse
This article mainly introduces examples of CSS3 animation to achieve frame-by-frame animation effects. It has certain reference value. Interested friends can refer to it.
The animation attribute in css3 is very powerful, but you can I rarely use it. I was asked about it in an interview recently. I will make a short summary of animation while I have time now. At the same time, a demo of frame-by-frame animation is implemented as an exercise
List of animation attributes
Because there are many animation attributes, it is a bit painful to see it in w3c, so I just did it. A map, if you want to check it later, it will be clear at a glance
Use animation to achieve frame-by-frame animation
Be familiar with the properties of animation After that, I have to find a simple small project to implement. Frame-by-frame animation is so interesting. Let’s run one to satisfy myself first. The idea is very simple, which is to give the element a sprite background, and then add the frame animation to change the background-position. Key code:
@keyframes run{
from{
background-position: 0 0;
}
to{
background-position: -1540px 0 ;
}
}
p{
width:140px;
height:140px;
background: url(run.png) ;
animation-name：run;
animation-duration:1s;
animation-iteration-count:infinite;
}
It turns out that animation transitions in ease mode by default, which inserts tweening animation between each key frame, so the animation effect is consistent
It’s easy to solve if you know the reason. The solution is:
@keyframes run{
0%, 8%{ /*动作一*/ }
9.2%, 17.2%{ /*动作二*/ }
...
}
#step1: Stay 8 frames between actions, 0% Set action one, end action one at 8%<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css3逐帧动画</title>
<style>
@keyframes run{
0%, 8%{ background-position: 0 0; }
9.2%, 17.2%{ background-position: -140px 0; }
18.4%, 26.4%{ background-position: -280px 0 ; }
27.6%, 35.6%{ background-position: -420px 0 ; }
36.8%, 44.8%{ background-position: -560px 0 ; }
46%, 54%{ background-position: -700px 0 ; }
55.2%, 63.2%{ background-position: -840px 0 ; }
64.4%, 72.4%{ background-position: -980px 0 ; }
73.6%, 81.6%{ background-position: -1120px 0 ; }
82.8%, 90.8%{ background-position: -1400px 0 ; }
92%, 100%{ background-position: -1540px 0 ; }
}
@-webkit-keyframes run{
0%, 8%{ background-position: 0 0; }
9.2%, 17.2%{ background-position: -140px 0; }
18.4%, 26.4%{ background-position: -280px 0 ; }
27.6%, 35.6%{ background-position: -420px 0 ; }
36.8%, 44.8%{ background-position: -560px 0 ; }
46%, 54%{ background-position: -700px 0 ; }
55.2%, 63.2%{ background-position: -840px 0 ; }
64.4%, 72.4%{ background-position: -980px 0 ; }
73.6%, 81.6%{ background-position: -1120px 0 ; }
82.8%, 90.8%{ background-position: -1400px 0 ; }
92%, 100%{ background-position: -1540px 0 ; }
}
p{
width:140px;
height:140px;
background: url(blog/754767/201606/754767-20160601000042992-1734972084.png) ;
animation:run 1s infinite;
-webkit-animation:run 1s infinite;
animation-fill-mode : backwards;
-webkit-animation-fill-mode : backwards;
}
</style>
</head>
<body>
<p></p>
</body>
</html>
There is another implementation method, which is to use steps(), which is between frames Step animation, this is not written in w3c, first post a picture
steps(1,end): Maintain the 0% style until the end of this frame (not the entire cycle)
The step-start effect is equivalent to steps(1,start), and the step-end effect is equivalent to steps(1,end)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>css3逐帧动画</title>
<style>
@keyframes run{
0%{
background-position: 0 0;
}
8.333%{
background-position: -140px 0;
}
16.666%{
background-position: -280px 0 ;
}
25.0%{
background-position: -420px 0 ;
}
33.333%{
background-position: -560px 0 ;
}
41.666%{
background-position: -700px 0 ;
}
50.0%{
background-position: -840px 0 ;
}
58.333%{
background-position: -980px 0 ;
}
66.666%{
background-position: -1120px 0 ;
}
75.0%{
background-position: -1260px 0 ;
}
83.333%{
background-position: -1400px 0 ;
}
91.666%{
background-position: -1540px 0 ;
}
100%{
background-position: 0 0 ;
}
}
@-webkit-keyframes run{
0%{
background-position: 0 0;
}
8.333%{
background-position: -140px 0;
}
16.666%{
background-position: -280px 0 ;
}
25.0%{
background-position: -420px 0 ;
}
33.333%{
background-position: -560px 0 ;
}
41.666%{
background-position: -700px 0 ;
}
50.0%{
background-position: -840px 0 ;
}
58.333%{
background-position: -980px 0 ;
}
66.666%{
background-position: -1120px 0 ;
}
75.0%{
background-position: -1260px 0 ;
}
83.333%{
background-position: -1400px 0 ;
}
91.666%{
background-position: -1540px 0 ;
}
100%{
background-position: 0 0 ;
}
}
p{
width:140px;
height:140px;
background: url(754767/201606/754767-20160601000042992-1734972084.png) ;
animation:run 1s steps(1, start) infinite;
-webkit-animation:run 1s steps(1, start) infinite;
}
</style>
</head>
<body>
<p></p>
</body>
The above is the detailed content of CSS3 animation implements frame-by-frame animation effect example introduction. For more information, please follow other related articles on the PHP Chinese website!