昨天下午接到一个需求,需要做一个数字显示消失的效果,对于某一些童鞋来说,可能首选插件。的确,类似的插件的确很多,但这不是我本次想分享的,废话不多说,一起先来看下设计师的效果图(局部):
设计师要求输入猜收盈价的时候数字加些显示特效,如果删除的时候加上消失的效果。实现这个交互,我们需要掌握两个基本点:
1、CSS3 Animation数字的动画
2、表单输入框基本JS操作方法
我们今天主要分享的是第一点,因为第二点比较容易,后面会简单介绍。
当然,如果你要做这个动画,还是需要了解下animation动画的基础知识,我们一起来普及下。
定义和用法
animation 属性是一个简写属性,用于设置六个动画属性:
animation-name
animation-duration
animation-timing-function
animation-delay
animation-iteration-count
animation-direction
注释:请始终规定 animation-duration 属性,否则时长为 0,就不会播放动画了。
默认值: | none 0 ease 0 1 normal |
---|---|
继承性: | no |
版本: | CSS3 |
JavaScript 语法: | object.style.animation="mymove 5s infinite" |
基本语法
animation: name duration timing-function delay iteration-count direction;
值 | 描述 |
---|---|
animation-name | 规定需要绑定到选择器的 keyframe 名称。。 |
animation-duration | 规定完成动画所花费的时间,以秒或毫秒计。 |
animation-timing-function | 规定动画的速度曲线。 |
animation-delay | 规定在动画开始之前的延迟。 |
animation-iteration-count | 规定动画应该播放的次数。 |
animation-direction | 规定是否应该轮流反向播放动画。 |
了解完基础知识,我们进入动画制作。现在我们分别以DEMO形式来介绍文本7种动画效果:
案例解析
我们先定义一个动画:
/* Animation One */ @keyframes revolveScale { 60% { transform: translate(20px, 20px) rotate(30deg) scale(.3); } 100% { transform: translate(0) rotate(0) scale(1); opacity: 1; } } @-webkit-keyframes revolveScale { 60% { -webkit-transform: translate(20px, 20px) rotate(30deg) scale(.3); } 100% { -webkit-transform: translate(0) rotate(0) scale(1); opacity: 1; } }
然后调用动画。如下代码:
.one span { color: #24a8e6; opacity: 0; transform: translate(-150px, -50px) rotate(-180deg) scale(3); animation: revolveScale .4s forwards; -webkit-transform: translate(-150px, -50px) rotate(-180deg) scale(3); -webkit-animation: revolveScale .4s forwards; }
因为文本需要逐个出现,我们需要把每个元素分隔开来,以CSS3 Animation为例来看下HTML:
<div class="animate one"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div>
然后我们通过CSS3动画延时方法来控制每个字母的出场顺序,一起来看下CSS代码:
.animate span:nth-of-type(2) { animation-delay: .05s; } .animate span:nth-of-type(3) { animation-delay: .1s; } .animate span:nth-of-type(4) { animation-delay: .15s; } .animate span:nth-of-type(5) { animation-delay: .2s; } .animate span:nth-of-type(6) { animation-delay: .25s; } .animate span:nth-of-type(7) { animation-delay: .3s; } .animate span:nth-of-type(8) { animation-delay: .35s; } .animate span:nth-of-type(9) { animation-delay: .4s; } .animate span:nth-of-type(10) { animation-delay: .45s; } .animate span:nth-of-type(11) { animation-delay: .5s; } .animate span:nth-of-type(12) { animation-delay: .55s; } .animate span:nth-of-type(13) { animation-delay: .6s; } .animate span:nth-of-type(14) { animation-delay: .65s; }
说明:动画中的细节效果有时候不一定跟设计师的想法吻合,需要小调,比如文字动画的显示幅度,我们可以调整其中的数值(比如旋转rotate、缩放scale、延时delay等),达到预期效果。
OK,我们一起来看下最终DEMO效果:
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>CSS3 Animation文字动画特效</title> <style> @import url('https://fonts.googleapis.com/css?family=Lato:100,100i,300,300i,400,400i,700,700i,900,900i'); * { margin: 0; padding: 0; } body { font-family: 'Lato', sans-serif; font-size: 14px; color: #999999; word-wrap: break-word; } p { margin: 0 0 10px; } ul { list-style: none; } .container { width: 100%; margin: auto; font-weight: 900; text-transform: uppercase; text-align: center; padding: 0 0 200px; } a, a:link, a:visited { text-decoration: none; padding: 9px 15px; border: 1px solid #ececec; border-radius: 5px; color: gray; } .animate { font-size: 50px; margin: 100px 0 0; border-bottom: 2px solid #ccc; } .animate span { display: inline-block; } .animate span:nth-of-type(2) { animation-delay: .05s; } .animate span:nth-of-type(3) { animation-delay: .1s; } .animate span:nth-of-type(4) { animation-delay: .15s; } .animate span:nth-of-type(5) { animation-delay: .2s; } .animate span:nth-of-type(6) { animation-delay: .25s; } .animate span:nth-of-type(7) { animation-delay: .3s; } .animate span:nth-of-type(8) { animation-delay: .35s; } .animate span:nth-of-type(9) { animation-delay: .4s; } .animate span:nth-of-type(10) { animation-delay: .45s; } .animate span:nth-of-type(11) { animation-delay: .5s; } .animate span:nth-of-type(12) { animation-delay: .55s; } .animate span:nth-of-type(13) { animation-delay: .6s; } .animate span:nth-of-type(14) { animation-delay: .65s; } /* Animation One */ .one span { color: #24a8e6; opacity: 0; transform: translate(-150px, -50px) rotate(-180deg) scale(3); animation: revolveScale .4s forwards; -webkit-transform: translate(-150px, -50px) rotate(-180deg) scale(3); -webkit-animation: revolveScale .4s forwards; } @keyframes revolveScale { 60% { transform: translate(20px, 20px) rotate(30deg) scale(.3); } 100% { transform: translate(0) rotate(0) scale(1); opacity: 1; } } @-webkit-keyframes revolveScale { 60% { -webkit-transform: translate(20px, 20px) rotate(30deg) scale(.3); } 100% { -webkit-transform: translate(0) rotate(0) scale(1); opacity: 1; } } </style> </head> <body> <div class="animate one"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> </body> </html>
大家看到demo效果只是显示出来的效果:
如果要用同样的方法消失,其实很简单,把动画的设置反过来即可,这里就不啰嗦了,不会弄的,可以加入群:295431592。
后面还有6个demo,跟上面的比较相似,不一一讲解了,这里就直接贴出DEMO代码,大家学习下:
<!doctype html> <html> <head> <meta charset="utf-8"> <title>CSS3 Animation文字动画特效 - Web前端之家</title> <style> * { margin: 0; padding: 0; } body { font-family: 'Lato', sans-serif; font-size: 14px; color: #999999; word-wrap: break-word; } p { margin: 0 0 10px; } ul { list-style: none; } .container { width: 100%; margin: auto; font-weight: 900; text-transform: uppercase; text-align: center; padding: 0 0 200px; } /*.take-input { margin: 50px 0 0; } .take-input input { width: 400px; height: 35px; padding: 0 10px; border-radius: 5px; border: 1px solid #ececec; margin: 0 15px 0 0; font-size: 15px; }*/ a, a:link, a:visited { text-decoration: none; padding: 9px 15px; border: 1px solid #ececec; border-radius: 5px; color: gray; } .animate { font-size: 50px; margin: 100px 0 0; border-bottom: 2px solid #ccc; } .animate span { display: inline-block; } a.repeat { display: inline-block; font-size: 12px; text-transform: none; text-decoration: none; color: orange; padding: 5px 12px; border: 1px solid #cecece; font-weight: normal; margin: 0 0 0 50px; border-radius: 5px; position: relative; bottom: 15px; } .animate span:nth-of-type(2) { animation-delay: .05s; } .animate span:nth-of-type(3) { animation-delay: .1s; } .animate span:nth-of-type(4) { animation-delay: .15s; } .animate span:nth-of-type(5) { animation-delay: .2s; } .animate span:nth-of-type(6) { animation-delay: .25s; } .animate span:nth-of-type(7) { animation-delay: .3s; } .animate span:nth-of-type(8) { animation-delay: .35s; } .animate span:nth-of-type(9) { animation-delay: .4s; } .animate span:nth-of-type(10) { animation-delay: .45s; } .animate span:nth-of-type(11) { animation-delay: .5s; } .animate span:nth-of-type(12) { animation-delay: .55s; } .animate span:nth-of-type(13) { animation-delay: .6s; } .animate span:nth-of-type(14) { animation-delay: .65s; } /* Animation One */ .one span { color: #24a8e6; opacity: 0; transform: translate(-150px, -50px) rotate(-180deg) scale(3); animation: revolveScale .4s forwards; } @keyframes revolveScale { 60% { transform: translate(20px, 20px) rotate(30deg) scale(.3); } 100% { transform: translate(0) rotate(0) scale(1); opacity: 1; } } /* Animation Two */ .two span { color: #a5cb21; opacity: 0; transform: translate(200px, -100px) scale(2); animation: ballDrop .3s forwards; } @keyframes ballDrop { 60% { transform: translate(0, 20px) rotate(-180deg) scale(.5); } 100% { transform: translate(0) rotate(0deg) scale(1); opacity: 1; } } /* Animation Three */ .three span { color: #b10e81; opacity: 0; transform: translate(-300px, 0) scale(0); animation: sideSlide .5s forwards; } @keyframes sideSlide { 60% { transform: translate(20px, 0) scale(1); color: #b10e81; } 80% { transform: translate(20px, 0) scale(1); color: #b10e81; } 99% { transform: translate(0) scale(1.2); color: #00f0ff; } 100% { transform: translate(0) scale(1); opacity: 1; color: #b10e81; } } /* Animation Four */ .four span { color: #8d6a00; opacity: 0; transform: translate(0, -100px) rotate(360deg) scale(0); animation: revolveDrop .3s forwards; } @keyframes revolveDrop { 30% { transform: translate(0, -50px) rotate(180deg) scale(1); } 60% { transform: translate(0, 20px) scale(.8) rotate(0deg); } 100% { transform: translate(0) scale(1) rotate(0deg); opacity: 1; } } /* Animation Five */ .five span { color: #dd3f0f; opacity: 0; transform: translate(0, -100px) rotate(360deg) scale(0); animation: dropVanish .5s forwards; } @keyframes dropVanish { 30% { transform: translate(0, -50px) rotate(180deg) scale(1); } 50% { transform: translate(0, 20px) scale(.8) rotate(0deg); opacity: 1; } 80% { transform: translate(-100px, -100px) scale(1.5) rotate(-180deg); opacity: 0; } 100% { transform: translate(0) scale(1) rotate(0deg); opacity: 1; } } /* Animation Six */ .six span { color: #ddb40f; opacity: 0; transform: rotate(-180deg) translate(150px, 0); animation: twister .5s forwards; } @keyframes twister { 10% { opacity: 1; } 100% { transform: rotate(0deg) translate(0); opacity: 1; } } /* Animation Seven */ .seven span { color: #348c04; opacity: 0; transform: translate(-150px, 0) scale(.3); animation: leftRight .5s forwards; } @keyframes leftRight { 40% { transform: translate(50px, 0) scale(.7); opacity: 1; color: #348c04; } 60% { color: #0f40ba; } 80% { transform: translate(0) scale(2); opacity: 0; } 100% { transform: translate(0) scale(1); opacity: 1; } } </style> </head> <body> <div class="container"> <div class="animate one"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> <div class="animate two"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> <div class="animate three"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> <div class="animate four"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> <div class="animate five"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> <div class="animate six"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> <div class="animate seven"> <span>c</span><span>s</span><span>s</span><span>3</span> <span>a</span><span>n</span><span>i</span><span>m</span><span>a</span><span>t</span><span>i</span><span>o</span><span>n</span><span>s</span> </div> </div> </body> </html>
OK,动画阶段差不多这样了。再回头看看项目的要求,我们需要把这个效果放到输入表单上来,其实我们可以这样做:
把文本的框架定位浮动到输入框上面,如果直接用value或者placeholder可能不太好弄(相对比较复杂);然后通过JS控制文本显示和消失的动画,比如点击时,加上动画的样式即可,由于简单,不贴代码了,不懂的加群吧。
本次分享主题到此为止了。
总结
本次分享主题属于比较基础的,通过这些知识点,希望能对大家有所帮助吧。当然如有诚恳意见,敬请留言。
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