灌装水动画 [英] Filling water animation

问题描述

我想要清除动画，使圆形看起来像它充满水。我遇到了两个错误，甚至无法解决第三个问题：

I am trying to get a wipe up animation to make a circle look like it's filling with water. I've run into two errors, and haven't been able to even tackle the 3rd one:

1. 它填补了错误的方式


2. 在填写后会重置为空白（黑色）


3. 现在， $ c>< img> 标签，但我想将此效果移动到 body {background-image：} 如何做到这一点。

1. It fills up the wrong way
2. It resets to empty (black) after it has filled *
3. For now, I am using the <img> tags, but I would like to move this effect to body { background-image: } and need some direction on how to do this.

我到目前为止所做的尝试：

#banner {
  width: 300px;
  height: 300px;
  position: relative;
}
#banner div {
  position: absolute;
}
#banner div:nth-child(2) {
  -webkit-animation: wipe 6s;
  -webkit-animation-delay: 0s;
  -webkit-animation-direction: up;
  -webkit-mask-size: 300px 3000px;
  -webkit-mask-position: 300px 300px;
  -webkit-mask-image: -webkit-gradient(linear, left bottom, left top, color-stop(0.00, rgba(0, 0, 0, 1)), color-stop(0.25, rgba(0, 0, 0, 1)), color-stop(0.27, rgba(0, 0, 0, 0)), color-stop(0.80, rgba(0, 0, 0, 0)), color-stop(1.00, rgba(0, 0, 0, 0)));
}
@-webkit-keyframes wipe {
  0% {
    -webkit-mask-position: 0 0;
  }
  100% {
    -webkit-mask-position: 300px 300px;
  }
}

<div id="banner">
  <div>
    <img src="http://i.imgur.com/vklf6kK.png" />
  </div>
  <div>
    <img src="http://i.imgur.com/uszeRpk.png" />
  </div>
</div>

将它设置为 @anpsmn 建议的默认屏蔽位置，不会将其重置为黑色

Giving it a default mask position as @anpsmn suggested, doesn't reset it to black anymore.

推荐答案

这可以通过单个div和 :: before 伪元素：

This can be achieved with a single div and a ::before pseudo element:

• 给予 #banner border-radius：50％创建一个圆圈，并 overflow：hidden 剪切其子项。

• The #banner is given border-radius: 50% to create a circle and overflow: hidden to clip its children inside it

c $ c> :: before 伪元素被动画化为100％高度，动画使用 转发值。它使用底部开始： c

The ::before pseudo element is animated to 100% height and the animation is paused at 100% using the forwards value. It begins at the bottom with the use of bottom: 0

背景图片将应用于黑色和蓝色背景的地方 #banner 和 #banner :: before

The background images would be applied in place of the black and blue backgrounds on #banner and #banner::before

兼容性：IE10 +和所有现代浏览器。 -webkit - 前缀属性很可能不再需要您的关键帧动画。 在caniuse.com上查看浏览器兼容性图表

Compatibility: IE10+ and all modern browsers. The -webkit- prefixed property is most likely no longer necessary for your keyframe animations. Check the browser compatibility chart over here on caniuse.com

我已经添加了立方贝赛尔（.2，.6，.8，.4） 这在@ChrisSpittles答案中有解释。它提供了一个整洁的效果！

I have added the cubic-bezier(.2,.6,.8,.4) which is explained in @ChrisSpittles answer. It provides a neat effect!

#banner {
  width: 300px;
  height: 300px;
  position: relative;
  background: #000;
  border-radius: 50%;
  overflow: hidden;
}
#banner::before {
  content: '';
  position: absolute;
  background: #04ACFF;
  width: 100%;
  bottom: 0;
  animation: wipe 5s cubic-bezier(.2,.6,.8,.4) forwards;
}
@keyframes wipe {
  0% {
    height: 0;
  }
  100% {
    height: 100%;
  }
}

<div id="banner">

</div>

这篇关于灌装水动画的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！