uniapp实现css加载图标动画

效果图：

<view class="">
<view class="spinner">
<view class="spinner-container container1">
<view class="circle1"></view>
<view class="circle2"></view>
<view class="circle3"></view>
<view class="circle4"></view>
</view>
<view class="spinner-container container2">
<view class="circle1"></view>
<view class="circle2"></view>
<view class="circle3"></view>
<view class="circle4"></view>
</view>
<view class="spinner-container container3">
<view class="circle1"></view>
<view class="circle2"></view>
<view class="circle3"></view>
<view class="circle4"></view>
</view>
</view>
</view>

style:

.spinner {
margin: 0 auto;
width: 60rpx;
height: 60rpx;
position: relative;
margin-top:550rpx;
}

.container1 > view, .container2 > view, .container3 > view {
width: 10rpx;
height: 10rpx;
background-color: #333;

border-radius: 100%;
position: absolute;
-webkit-animation: bouncedelay 1.2s infinite ease-in-out;
animation: bouncedelay 1.2s infinite ease-in-out;
-webkit-animation-fill-mode: both;
animation-fill-mode: both;
align-items: center;
}

.spinner .spinner-container {
position: absolute;
width: 100%;
height: 100%;
}

.container2 {
-webkit-transform: rotateZ(45deg);
transform: rotateZ(45deg);
}

.container3 {
-webkit-transform: rotateZ(90deg);
transform: rotateZ(90deg);
}

.circle1 { top: 0; left: 0; }
.circle2 { top: 0; right: 0; }
.circle3 { right: 0; bottom: 0; }
.circle4 { left: 0; bottom: 0; }

.container2 .circle1 {
-webkit-animation-delay: -1.1s;
animation-delay: -1.1s;
}

.container3 .circle1 {
-webkit-animation-delay: -1.0s;
animation-delay: -1.0s;
}

.container1 .circle2 {
-webkit-animation-delay: -0.9s;
animation-delay: -0.9s;
}

.container2 .circle2 {
-webkit-animation-delay: -0.8s;
animation-delay: -0.8s;
}

.container3 .circle2 {
-webkit-animation-delay: -0.7s;
animation-delay: -0.7s;
}

.container1 .circle3 {
-webkit-animation-delay: -0.6s;
animation-delay: -0.6s;
}

.container2 .circle3 {
-webkit-animation-delay: -0.5s;
animation-delay: -0.5s;
}

.container3 .circle3 {
-webkit-animation-delay: -0.4s;
animation-delay: -0.4s;
}

.container1 .circle4 {
-webkit-animation-delay: -0.3s;
animation-delay: -0.3s;
}

.container2 .circle4 {
-webkit-animation-delay: -0.2s;
animation-delay: -0.2s;
}

.container3 .circle4 {
-webkit-animation-delay: -0.1s;
animation-delay: -0.1s;
}

@-webkit-keyframes bouncedelay {
0%, 80%, 100% { -webkit-transform: scale(0.0) }
40% { -webkit-transform: scale(1.0) }
}

@keyframes bouncedelay {
0%, 80%, 100% {
transform: scale(0.0);
-webkit-transform: scale(0.0);
} 40% {
transform: scale(1.0);
-webkit-transform: scale(1.0);
}
}