animation-timing-function规定动画的速度曲线。默认是 “ease”。
animation-timing-function: ease; animation-timing-function: ease-in; animation-timing-function: ease-out; animation-timing-function: ease-in-out; animation-timing-function: linear; animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1); animation-timing-function: step-start; animation-timing-function: step-end; animation-timing-function: steps(4, end); animation-timing-function: ease, step-start, cubic-bezier(0.1, 0.7, 1.0, 0.1);
值 | 描述 |
---|---|
linear | 定义以相同速度开始至结束的过渡效果(等于 cubic-bezier(0,0,1,1))。 |
ease | 定义慢速开始,然后变快,然后慢速结束的过渡效果(cubic-bezier(0.25,0.1,0.25,1))。 |
ease-in | 定义以慢速开始的过渡效果(等于 cubic-bezier(0.42,0,1,1))。 |
ease-out | 定义以慢速结束的过渡效果(等于 cubic-bezier(0,0,0.58,1))。 |
ease-in-out | 定义以慢速开始和结束的过渡效果(等于 cubic-bezier(0.42,0,0.58,1))。 |
cubic-bezier(n,n,n,n) | 在 cubic-bezier 函数中定义自己的值。可能的值是 0 至 1 之间的数值。 |
HTML
<div class="stage"> <figure class="ball"></figure> </div>
CSS
@keyframes 'slide' { from { left: 0; top: 0; } 50% { left: 244px; top: 100px; } to { left: 488px; top: 0; } } .stage { height: 150px; position: relative; min-width: 550px; } .stage .ball { animation-name: slide; animation-duration:2s; animation-timing-function: ease-in-out;//动画的播放方式 animation-delay: 1.5s; animation-iteration-count: infinite; animation-direction: alternate; } .ball { background: red; border-radius: 50%; height: 40px; position: absolute; width: 40px; }
执行结果