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Home Web Front-end HTML Tutorial 关于@keyframes定义动画的问题_html/css_WEB-ITnose

关于@keyframes定义动画的问题_html/css_WEB-ITnose

Jun 21, 2016 am 08:57 AM

我想让一个长方形先转30度,再向右走200px距离,然后再转330度,最后走回原位。(代码不考虑兼容性)









运行的时候不是按我想的步骤来的,而是:转30度和向右走同时进行,转330度和往回走同时进行。请问为什么?
怎么写正确的代码完成我的要求?


回复讨论(解决方案)

@keyframes donghua
{
 0%  {width:120px;height:50px;left:0px; top:0px;}
 25% {transform:rotate(30deg);left:0px;}
 50% {transform:rotate(30deg);left:200px; top:0px;}
 75% {transform:rotate(330deg);left:200px;}
100% {transform:rotate(330deg);left:0px; top:0px;}
}

@keyframes donghua{ 0%  {width:120px;height:50px;left:0px; top:0px;} 25% {transform:rotate(30deg);left:0px;} 50% {transform:rotate(30deg);left:200px; top:0px;} 75% {transform:rotate(360deg);left:200px;}100% {transform:rotate(360deg);left:0px; top:0px;}}
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@keyframes donghua{ 0%  {width:120px;height:50px;left:0px; top:0px;} 25% {transform:rotate(30deg);left:0px;} 50% {transform:rotate(30deg);left:200px; top:0px;} 75% {transform:rotate(360deg);left:200px;}100% {transform:rotate(360deg);left:0px; top:0px;}}
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你写的我倒是看明白了,在25%处定义它在left:0px;就可以不右移。 但我还是很奇怪,即便我没有定义left:0px; ,但我也没有让它右移啊,凭什么它就同时右移了?


@keyframes donghua{ 0%  {width:120px;height:50px;left:0px; top:0px;} 25% {transform:rotate(30deg);left:0px;} 50% {transform:rotate(30deg);left:200px; top:0px;} 75% {transform:rotate(360deg);left:200px;}100% {transform:rotate(360deg);left:0px; top:0px;}}
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你写的我倒是看明白了,在25%处定义它在left:0px;就可以不右移。  但我还是很奇怪,即便我没有定义left:0px; ,但我也没有让它右移啊,凭什么它就同时右移了?

@keyframes 本来就可以多个属性同时做动画。每个属性的变化都是独立的

你要求的是时间轴在25%到50%时让left从0变化到200;

可你只在 0% 设置left:0px;, 50% 设置left:200px;
25% 中没有设置left属性。就是25%时不对left影响
这样就是时间轴在0%到50%时让left从0变化到200;

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