html - 为什么我的自定义动画不能正常工作？

Question

我的自定义@keyframes 动画没有按应有的方式工作。

Block 1之间没有差距和 Block 2旋转时，Block 2之间有一个小间隙和 Block 3 , Block 3和 Block 4 , 和 Block 4和 Block 1 .

我不明白为什么上面列出的 block 之间有间隙，或者为什么 block 1 和 block 2 之间没有 block 。我应该怎么做才能消除间隙，我希望它看起来像一个没有间隙的盒子。

对代码的任何其他建议也很感激。下面是代码。

.main {
  width: 250px;
  height: 100px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.main>div {
  width: 250px;
  height: 100px;
  position: absolute;
  text-align: center;
  line-height: 100px;
  color: #fff;
  font-weight: bold;
  font-family: monospace;
  font-size: 2em;
  transition: 1s;
  cursor: pointer;
}

.child1 {
  background: red;
  transform-origin: bottom;
  animation: animate1 8s infinite;
}

.child2 {
  background: blue;
  transform-origin: top;
  animation: animate2 8s infinite;
}

.child3 {
  background: yellow;
  transform-origin: bottom;
  animation: animate3 8s infinite;
}

.child4 {
  background: green;
  transform-origin: top;
  animation: animate4 8s infinite;
}


/*.main:hover .child1{
	transform: translateY(-100%) rotateX(90deg);
}

.main:hover .child2{
	transform: translateY(0%) rotateX(0deg);
}*/

@keyframes animate1 {
  0% {
    transform: translateY(0%) rotateX(0deg);
  }
  25% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  50% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  75% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
  100% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
}

@keyframes animate2 {
  0% {
    transform: translateY(100%) rotateX(90deg);
  }
  25% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
  50% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  75% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  100% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
}

@keyframes animate3 {
  0% {
    transform: translateY(-100%) rotateX(90deg);
  }
  25% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
  50% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
  75% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  100% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
}

@keyframes animate4 {
  0% {
    transform: translateY(-100%) rotateX(90deg);
  }
  25% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  50% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
  75% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
  100% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
}

<div class="main">
  <div class="child1">Block 1</div>
  <div class="child2">Block 2!</div>
  <div class="child3">Block 3</div>
  <div class="child4">Block 4</div>
</div>

Answer 1

这是因为您正在为状态之间的 transform-origin 设置动画，您应该通过添加更多状态来避免这种情况，以便快速更改 transform-origin。通过更改 transform-origin，您可以从逻辑上更改元素的旋转方式，并创建不需要的移动，从而创建您看到的间隙。

为什么在区 block 1 和区 block 2 之间看不到它？

仅仅是因为如果你查看两个元素的第一个状态，你会发现 transform-origin 没有变化，所以没有移动会产生与其他状态不同的间隙:

.main {
  width: 250px;
  height: 100px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.main>div {
  width: 250px;
  height: 100px;
  position: absolute;
  text-align: center;
  line-height: 100px;
  color: #fff;
  font-weight: bold;
  font-family: monospace;
  font-size: 2em;
  transition: 1s;
  cursor: pointer;
}

.child1 {
  background: red;
  transform-origin: bottom;
  animation: animate1 8s infinite;
}

.child2 {
  background: blue;
  transform-origin: top;
  animation: animate2 8s infinite;
}

.child3 {
  background: yellow;
  transform-origin: bottom;
  animation: animate3 8s infinite;
}

.child4 {
  background: green;
  transform-origin: top;
  animation: animate4 8s infinite;
}

@keyframes animate1 {
  0% {
    transform-origin: bottom;
    transform: translateY(0%) rotateX(0deg);
  }
  25% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  50% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  75% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
  100% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
}

@keyframes animate2 {
  0% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
  25% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
  25.5% {
    transform-origin: bottom;
    transform: translateY(0%) rotateX(0deg);
  }
  50% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  75% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  75.5% {
    transform-origin: top;
    transform: translateY(-100%) rotateX(90deg);
  }
  100% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
}

@keyframes animate3 {
  0% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  0.5% {
    transform-origin: top;
    transform: translateY(-100%) rotateX(90deg);
  }
  25% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
  50% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
  50.5% {
    transform-origin: bottom;
    transform: translateY(0%) rotateX(0deg);
  }
  75% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  100% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
}

@keyframes animate4 {
  0% {
    transform-origin: top;
    transform: translateY(-100%) rotateX(90deg);
  }
  0.5% {
    transform-origin: top;
    transform: translateY(-100%) rotateX(90deg);
  }
  25% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
  25.5% {
    transform-origin: top;
    transform: translateY(-100%) rotateX(90deg);
  }
  50% {
    transform-origin: top;
    transform: translateY(100%) rotateX(90deg);
  }
  75% {
    transform-origin: top;
    transform: translateY(0%) rotateX(0deg);
  }
  75.5% {
    transform-origin: bottom;
    transform: translateY(0%) rotateX(0deg);
  }
  100% {
    transform-origin: bottom;
    transform: translateY(-100%) rotateX(90deg);
  }
}

<div class="main">
  <div class="child1">Block 1</div>
  <div class="child2">Block 2!</div>
  <div class="child3">Block 3</div>
  <div class="child4">Block 4</div>
</div>