用CSS制作Loading加载动画【第一期】

随着我们对CSS3的熟悉，使用CSS制作Loading加载动画的童鞋越来越多。看到CSS3越来越火爆，小编也按捺不住了！准备把一些华丽的加载动画与大家一起分享。这次，小编汇集了8个简洁清爽的基础Loading加载动画。在今后的日子里，小编将会发布更多不同类型的Loading加载动画供大家参考。如果你喜欢以下的内容，请您持续关注《用CSS制作Loading加载动画》系列。

经典加载条

HTML

<div class="bar"></div>

CSS

.bar {
  width: 100%;
  height: 20px;
  border: 1px solid #2980b9;
  border-radius: 3px;
  background-image: 
    repeating-linear-gradient(
      -45deg,
      #2980b9,
      #2980b9 11px,
      #eee 10px,
      #eee 20px /* determines size */
    );
  background-size: 28px 28px;
  animation: move .5s linear infinite;
}

@keyframes move {
  0% {
    background-position: 0 0;
  }
  100% {
    background-position: 28px 0;
  }
}

Win8 风格

HTML

<div class="spinner"></div>

CSS

.spinner {
  width: 60px;
  height: 60px;
  margin: 60px;
  animation: rotate 1.4s infinite ease-in-out, background 1.4s infinite ease-in-out alternate;
}

@keyframes rotate {
  0% {
    transform: perspective(120px) rotateX(0deg) rotateY(0deg);
  }
  50% {
    transform: perspective(120px) rotateX(-180deg) rotateY(0deg);
  }
  100% {
    transform: perspective(120px) rotateX(-180deg) rotateY(-180deg);
  }
}
@keyframes background {
  0% {
  background-color: #27ae60;
  }
  50% {
    background-color: #9b59b6;
  }
  100% {
    background-color: #c0392b;
  }
}

彩虹空心圆

HTML

<svg class="spinner" width="65px" height="65px" viewBox="0 0 66 66" xmlns="http://www.w3.org/2000/svg">
   <circle class="path" fill="none" stroke-width="6" stroke-linecap="round" cx="33" cy="33" r="30"></circle>
</svg>

CSS

html, body { height: 100%; }

body {
   display: flex;
   align-items: center;
   justify-content: center;
}

$offset: 187;
$duration: 1.4s;

.spinner {
  animation: rotator $duration linear infinite;
}

@keyframes rotator {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(270deg); }
}

.path {
  stroke-dasharray: $offset;
  stroke-dashoffset: 0;
  transform-origin: center;
  animation:
    dash $duration ease-in-out infinite, 
    colors ($duration*4) ease-in-out infinite;
}

@keyframes colors {
    0% { stroke: #4285F4; }
    25% { stroke: #DE3E35; }
    50% { stroke: #F7C223; }
    75% { stroke: #1B9A59; }
  100% { stroke: #4285F4; }
}

@keyframes dash {
 0% { stroke-dashoffset: $offset; }
 50% {
   stroke-dashoffset: $offset/4;
   transform:rotate(135deg);
 }
 100% {
   stroke-dashoffset: $offset;
   transform:rotate(450deg);
 }
}

空心圆渐变

HTML

<div class="signal"></div>

CSS

.signal {
    border: 5px solid #333;
    border-radius: 30px;
    height: 30px;
    left: 50%;
    margin: -15px 0 0 -15px;
    opacity: 0;
    position: absolute;
    top: 50%;
    width: 30px;

    animation: pulsate 1s ease-out;
    animation-iteration-count: infinite;
}

@keyframes pulsate {
    0% {
      transform: scale(.1);
      opacity: 0.0;
    }
    50% {
      opacity: 1;
    }
    100% {
      transform: scale(1.2);
      opacity: 0;
    }
}

复古风格加载条

HTML

<div id="wrapper">
  <div id="border">
    <div id="whitespace">
      <div id="line">
      </div>
    </div>
  </div>
</div>

CSS

html, body {
  margin: 0;
  height: 100%;
  position: relative;
}

#wrapper {
  width: 200px;
  height: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
}

#border {
  border: 3px solid #222;
  height: 100%;
  width: 100%;
  position: relative;
  left: -50%;
  top: -50%;
  padding: 4px 3px;
}

#whitespace {
  overflow: hidden;
  height: 100%;
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
  position: relative;
}

#line {
  position: absolute;
  height: 100%;
  width: 100%;
  background-color: black;
  -webkit-animation: slide 5s steps(40) infinite;
  -moz-animation: slide 5s steps(40) infinite;
  animation: slide 5s steps(40) infinite;
}

@keyframes slide {
  0% {
    left: -100%;  }  
  100% {
    left: 100%;  }
}
@-moz-keyframes slide {
  0% {
    left: -100%; }  
  100% {
    left: 100%;  }
}
@-webkit-keyframes slide {
  0% {
    left: -100%;}

  100% {
    left: 100%;  }
}

彩色律动

HTML

<div class="loading">
  <div class="loading-bar"></div>
  <div class="loading-bar"></div>
  <div class="loading-bar"></div>
  <div class="loading-bar"></div>
</div>

CSS

.loading {
  position: absolute;
  top: 50%;
  left: 50%;}
.loading-bar {
  display: inline-block;
  width: 4px;
  height: 18px;
  border-radius: 4px;
  animation: loading 1s ease-in-out infinite;}
.loading-bar:nth-child(1) {
  background-color: #3498db;
  animation-delay: 0;}
.loading-bar:nth-child(2) {
  background-color: #c0392b;
  animation-delay: 0.09s;}
.loading-bar:nth-child(3) {
  background-color: #f1c40f;
  animation-delay: .18s;}
.loading-bar:nth-child(4) {
  background-color: #27ae60;
  animation-delay: .27s;}

@keyframes loading {
  0% {
    transform: scale(1); }
  20% {
    transform: scale(1, 2.2);  }
  40% {
    transform: scale(1);}
}

三维加载标

HTML

<div class="container">
<div class="loader">
  <div class="dot dot1"></div>
  <div class="dot dot2"></div>
  <div class="dot dot3"></div>
  <div class="dot dot4"></div>
  <div class="dot dot5"></div>
  <div class="dot dot6"></div> 
  <div class="dot dot7"></div>
  <div class="dot dot8"></div>    
</div>
</div>

CSS

@import "compass/css3";

.container{
  transform-style:preserve-3d;
  transform:rotateX(-45deg);
}

.loader {
  width: 100px;
  height:100px;
  margin: 100px auto;
  transform-style:preserve-3d;
  animation-duration: 5s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-name: rotate;
  border-radius:100px;
  background:rgba(0,0,0,.025);
}

.dot {
  width: 20px;
  height: 20px;
  top:40px;
  lefT:40px;
  border-radius: 20px;
  background: #333;
  position: absolute;
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
  opacity:.1;
}

@for $i from 1 through 8 {
  .dot#{$i} { transform:rotate($i*45deg) translate3d(0px,-40px,20px) rotateX(-35deg);}
  .dot#{$i} {  animation-name: flash; animation-delay:$i*.125s;}; 

}

@keyframes rotate {
  from{ transform: rotateY(0deg) rotateX(90deg); }
  to { transform: rotateY(-360deg)  rotateX(90deg);}
}

@keyframes flash {
  from { opacity:.8 }
  to { opacity:.1}
}

绿磨盘

HTML

<div class="spinner"></div>

CSS

.spinner {
  box-sizing: border-box;
  height: 60px;
  width: 60px;
  margin: 80px;
  border: 0px solid #27ae60;
  border-radius: 50%;
  box-shadow: 0 -20px 0 24px #27ae60 inset;
  animation: rotate 1s infinite linear;
}

@keyframes rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
} 

下一期将为你呈现：《Loading 字样式加载动画》