About CSS3 animation to achieve frame-by-frame animation effect-CSS Tutorial-php.cn

Home

Web Front-end

CSS Tutorial

About CSS3 animation to achieve frame-by-frame animation effect

不言

Jun 20, 2018 pm 05:19 PM

animationcss

This article mainly introduces CSS3 animation to achieve frame-by-frame animation effect, which has certain reference value. Interested friends can refer to it

The animation attribute in css3 is very powerful, but you can use it yourself Relatively few, I just happened to be 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;   
}

But after running, we found that the frame animation between each frame of animation is sliding, which is not what we want. effect, why?

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, set action one at 0%, end action one at 8%

step2: Transition between actions for 1.2 frames, set action two at 9.2%, action two Ended at 17.2%

Full code:

<!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 the step animation between frames , this is not written in w3c, let me post a picture first

As can be seen from the above picture:

steps(1,start): Animation 1 Jump to 100% from the beginning until the end of this frame (not the entire cycle)

steps(1,end): Maintain the 0% style until the end of this frame (not the entire cycle)

You can also Directly set animation-timing-function: step-start/step-end

The step-start effect is equivalent to steps(1,start), and the step-end effect is equivalent to steps(1,end)

Finally The effect, because the recording problem may be a bit laggy, interested students can directly copy the code and run it:

Full code:

<!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 entire content of this article. I hope it will be helpful to everyone's study. For more related content, please pay attention to the PHP Chinese website!

Related recommendations:

How to use CSS3 box-reflect to create a reflection effect

About the animation attribute in CSS Instructions

The above is the detailed content of About CSS3 animation to achieve frame-by-frame animation effect. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Draggin' and Droppin' in ReactApr 17, 2025 am 11:52 AM

The React ecosystem offers us a lot of libraries that all are focused on the interaction of drag and drop. We have react-dnd, react-beautiful-dnd,

Fast SoftwareApr 17, 2025 am 11:49 AM

There have been some wonderfully interconnected things about fast software lately.

Nested Gradients with background-clipApr 17, 2025 am 11:47 AM

I can't say I use background-clip all that often. I'd wager it's hardly ever used in day-to-day CSS work. But I was reminded of it in a post by Stefan Judis,

Using requestAnimationFrame with React HooksApr 17, 2025 am 11:46 AM

Animating with requestAnimationFrame should be easy, but if you haven’t read React’s documentation thoroughly then you will probably run into a few things

Need to scroll to the top of the page?Apr 17, 2025 am 11:45 AM

Perhaps the easiest way to offer that to the user is a link that targets an ID on the element. So like...

The Best (GraphQL) API is One You WriteApr 17, 2025 am 11:36 AM

Listen, I am no GraphQL expert but I do enjoy working with it. The way it exposes data to me as a front-end developer is pretty cool. It's like a menu of

Weekly Platform News: Text Spacing Bookmarklet, Top-Level Await, New AMP Loading IndicatorApr 17, 2025 am 11:26 AM

In this week's roundup, a handy bookmarklet for inspecting typography, using await to tinker with how JavaScript modules import one another, plus Facebook's

Various Methods for Expanding a Box While Preserving the Border RadiusApr 17, 2025 am 11:19 AM

I've recently noticed an interesting change on CodePen: on hovering the pens on the homepage, there's a rectangle with rounded corners expanding in the back.

See all articles