用CSS实现加载的动画效果

用纯CSS实现加载的一些动态效果，可以把加载效果中的元素分成很多个小部分，每个部分都有动画，每个部分的动画再设置相应的延迟效果，这样，看起来就是连贯的加载动画效果。代码如下：

1、效果1

<div className='loading-con'>
      <div className='load-dian dian1'></div>
       <div className='load-dian dian2'></div>
       <div className='load-dian dian3'></div>
       <div className='load-dian dian4'></div>
       <div className='load-dian dian5'></div>
       <div className='text-loading'>加载中</div>
 </div>

.loading-con{
  position: absolute;
  top: 50%;
  width: 100px;
  height: 100px;
  left: 50%;
  transform: translate(-50%,-50%);
  background: rgba(0,0,0,0.65);
  border-radius: 8px;
}

.load-dian{
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 5px;
  background: #fff;
  top: 40%;
  -webkit-animation: Loading-delay 1.2s infinite ease-in-out both;
  animation: Loading-delay 1.2s infinite ease-in-out both;
}

.dian1{
  left: 15%;
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}
.dian2{
  left: 30%;
  -webkit-animation-delay: -1s;
  animation-delay: -1s;
}
.dian3{
  left: 45%;
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}
.dian4{
  left: 60%;
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}
.dian5{
  left: 75%;
  -webkit-animation-delay: -0.7s;
  animation-delay: -0.7s;
}

@-webkit-keyframes Loading-delay {
  0%, 100% {
    -webkit-transform: scale(0);
    transform: scale(0);
  }
  40% {
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}

2、效果2

<div className='loading-con-o'>
    <div className='load-item load-item-1'></div>
    <div className='load-item load-item-2'></div>
    <div className='load-item load-item-3'></div>
    <div className='load-item load-item-4'></div>
    <div className='load-item load-item-5'></div>
    <div className='load-item load-item-6'></div>
    <div className='load-item load-item-7'></div>
    <div className='load-item load-item-8'></div>
    <div className='load-item load-item-9'></div>
    <div className='load-item load-item-10'></div>
    <div className='load-item load-item-11'></div>
    <div className='load-item load-item-12'></div>
    <div className='text-loading'>加载中</div>
</div>

.loading-con-o{
  position: absolute;
  top:50%;
  width: 100px;
  height: 100px;
  left: 50%;
  transform: translate(-50%,-50%);
  background: rgba(0,0,0,0.65);
  border-radius: 8px;
}
.load-item{
  position: absolute;
  width: 8px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  top: 40%;
  left: calc(50% + 8px);
  transform-origin:-100%;
  -webkit-animation: Loading-delay1 1.2s infinite ease-in-out both;
  animation: Loading-delay1 1.2s infinite ease-in-out both;
}
@-webkit-keyframes Loading-delay1 {
  0%, 100% {
    opacity: 1;
  }
  40% {
    opacity: 0.1;
  }
}
.load-item-1{
  -webkit-transform: rotate(30deg);
  transform: rotate(30deg);
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}

.load-item-2{
  -webkit-transform: rotate(60deg);
  transform: rotate(60deg);
  -webkit-animation-delay: -1.0s;
  animation-delay: -1.0s;
}

.load-item-3{
  -webkit-transform: rotate(90deg);
  transform: rotate(90deg);
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

.load-item-4{
  -webkit-transform: rotate(120deg);
  transform: rotate(120deg);
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}

.load-item-5{
  -webkit-transform: rotate(150deg);
  transform: rotate(150deg);
  -webkit-animation-delay: -0.7s;
  animation-delay: -0.7s;
}
.load-item-6{
  -webkit-transform: rotate(180deg);
  transform: rotate(180deg);
  -webkit-animation-delay: -0.6s;
  animation-delay: -0.6s;
}
.load-item-7{
  -webkit-transform: rotate(210deg);
  transform: rotate(210deg);
  -webkit-animation-delay: -0.5s;
  animation-delay: -0.5s;
}
.load-item-8{
  -webkit-transform: rotate(240deg);
  transform: rotate(240deg);
  -webkit-animation-delay: -0.4s;
  animation-delay: -0.4s;
}
.load-item-9{
  -webkit-transform: rotate(270deg);
  transform: rotate(270deg);
  -webkit-animation-delay: -0.3s;
  animation-delay: -0.3s;
}
.load-item-10{
  -webkit-transform: rotate(300deg);
  transform: rotate(300deg);
  -webkit-animation-delay: -0.2s;
  animation-delay: -0.2s;
}
.load-item-11{
  -webkit-transform: rotate(330deg);
  transform: rotate(330deg);
  -webkit-animation-delay: -0.1s;
  animation-delay: -0.1s;
}
.load-item-12{
  -webkit-transform: rotate(360deg);
  transform: rotate(360deg);
  -webkit-animation-delay: -0s;
  animation-delay: -0s;
}