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Accepted
Aleksandr
Asked:2020-07-05 02:06:11 +0000 UTC2020-07-05 02:06:11 +0000 UTC

如何制作无限上下动画？

  • 772

我只能通过不断移动滑块来实现无穷大，但我需要先到最后，然后再从最后到开始：

body {
width: 100%;
height: 100%;
background-color: #333;
}

.header-down {
  width: 1px;
  height: 65px;
  top: 50%;
  left: 50%;
  margin-left: -1px;
  z-index: 92;
  background-color: #fff;
  position: absolute;
  overflow: hidden;
}

.header-down::after {
  width: 100%;
  height: 100%;
  position: absolute;
  content: '';
  background-color: #3cc9e5;
  transform: translate3d(0, - 100%, 0);
  animation: spin .7s infinite linear;
}

@keyframes spin {
  to {
    transform: translate3d(0, 100%, 0);
  }
}
<div class="header-down">
</div>

css

2 个回答

  1. Best Answer

    body {
width: 100%;
height: 100%;
background-color: #333;
}

.header-down {
  width: 1px;
  height: 65px;
  top: 50%;
  left: 50%;
  margin-left: -1px;
  z-index: 92;
  background-color: #fff;
  position: absolute;
  overflow: hidden;
}

.header-down::after {
  width: 100%;
  height: 100%;
  position: absolute;
  content: '';
  background-color: #3cc9e5;
  transform: translate3d(0, - 100%, 0);
  animation: spin 1.4s infinite linear;
}

@keyframes spin {
  0% {
    transform: translate3d(0, -100%, 0);
  }
  50% {
    transform: translate3d(0, 100%, 0);
  }
  100% {
    transform: translate3d(0, -100%, 0);
  }
}
    <div class="header-down">
</div>

    • 2

  2. 你好。这是最简单的解决方案：

    body {
width: 100%;
height: 100%;
background-color: #333;
}

.header-down {
  width: 1px;
  height: 65px;
  top: 50%;
  left: 50%;
  margin-left: -1px;
  z-index: 92;
  background-color: #fff;
  position: absolute;
  overflow: hidden;
}

.header-down::after {
  width: 100%;
  height: 100%;
  position: absolute;
  content: '';
  background-color: #3cc9e5;
  transform: translate3d(0, - 100%, 0);
  animation: spin .7s infinite linear;
}

@keyframes spin {
  0%, 100% {
    transform: translate(0, 0);
  }
  50% {
    transform: translate(0,100%);
  }
}
    <div class="header-down">
</div>

    • 2

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