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@-webkit-keyframes myfirst 动画 css3

2024-11-14 12:33:38   203人阅读

Internet Explorer 10、Firefox 以及 Opera 支持 @keyframes 规则和 animation 属性。

Chrome 和 Safari 需要前缀 -webkit-。

Internet Explorer 9，以及更早的版本，不支持 @keyframe 规则或 animation 属性。

 

当您在 @keyframes 中创建动画时，请把它捆绑到某个选择器，否则不会产生动画效果。

通过规定至少以下两项 CSS3 动画属性，即可将动画绑定到选择器：

  • 规定动画的名称
  • 规定动画的时长

例子：

当动画为 25% 及 50% 时改变背景色，然后当动画 100% 完成时再次改变：

div{animation: myfirst 5s;          /*IE*/-moz-animation: myfirst 5s;	/* Firefox */-webkit-animation: myfirst 5s;	/* Safari 和 Chrome */-o-animation: myfirst 5s;	/* Opera */}


@keyframes myfirst     /*IE*/{0%   {background: red;}25%  {background: yellow;}50%  {background: blue;}100% {background: green;}}@-moz-keyframes myfirst /* Firefox */{0%   {background: red;}25%  {background: yellow;}50%  {background: blue;}100% {background: green;}}@-webkit-keyframes myfirst /* Safari 和 Chrome */{0%   {background: red;}25%  {background: yellow;}50%  {background: blue;}100% {background: green;}}@-o-keyframes myfirst /* Opera */{0%   {background: red;}25%  {background: yellow;}50%  {background: blue;}100% {background: green;}}
改变背景色和位置：
@keyframes myfirst{0%   {background: red; left:0px; top:0px;}25%  {background: yellow; left:200px; top:0px;}50%  {background: blue; left:200px; top:200px;}75%  {background: green; left:0px; top:200px;}100% {background: red; left:0px; top:0px;}}@-moz-keyframes myfirst /* Firefox */{0%   {background: red; left:0px; top:0px;}25%  {background: yellow; left:200px; top:0px;}50%  {background: blue; left:200px; top:200px;}75%  {background: green; left:0px; top:200px;}100% {background: red; left:0px; top:0px;}}@-webkit-keyframes myfirst /* Safari 和 Chrome */{0%   {background: red; left:0px; top:0px;}25%  {background: yellow; left:200px; top:0px;}50%  {background: blue; left:200px; top:200px;}75%  {background: green; left:0px; top:200px;}100% {background: red; left:0px; top:0px;}}@-o-keyframes myfirst /* Opera */{0%   {background: red; left:0px; top:0px;}25%  {background: yellow; left:200px; top:0px;}50%  {background: blue; left:200px; top:200px;}75%  {background: green; left:0px; top:200px;}100% {background: red; left:0px; top:0px;}}


下面的表格列出了 @keyframes 规则和所有动画属性：

属性描述CSS
@keyframes规定动画。3
animation所有动画属性的简写属性，除了 animation-play-state 属性。3
animation-name规定 @keyframes 动画的名称。3
animation-duration规定动画完成一个周期所花费的秒或毫秒。默认是 0。3
animation-timing-function规定动画的速度曲线。默认是 "ease"。3
animation-delay规定动画何时开始。默认是 0。3
animation-iteration-count规定动画被播放的次数。默认是 1。3
animation-direction规定动画是否在下一周期逆向地播放。默认是 "normal"。3
animation-play-state规定动画是否正在运行或暂停。默认是 "running"。3
animation-fill-mode规定对象动画时间之外的状态。3

 

运行名为 myfirst 的动画，其中设置了所有动画属性：

div{animation-name: myfirst;animation-duration: 5s;animation-timing-function: linear;animation-delay: 2s;animation-iteration-count: infinite;animation-direction: alternate;animation-play-state: running;/* Firefox: */-moz-animation-name: myfirst;-moz-animation-duration: 5s;-moz-animation-timing-function: linear;-moz-animation-delay: 2s;-moz-animation-iteration-count: infinite;-moz-animation-direction: alternate;-moz-animation-play-state: running;/* Safari 和 Chrome: */-webkit-animation-name: myfirst;-webkit-animation-duration: 5s;-webkit-animation-timing-function: linear;-webkit-animation-delay: 2s;-webkit-animation-iteration-count: infinite;-webkit-animation-direction: alternate;-webkit-animation-play-state: running;/* Opera: */-o-animation-name: myfirst;-o-animation-duration: 5s;-o-animation-timing-function: linear;-o-animation-delay: 2s;-o-animation-iteration-count: infinite;-o-animation-direction: alternate;-o-animation-play-state: running;}


@-webkit-keyframes myfirst 动画 css3


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