1.实现效果

2.实现代码

<view class="ring">
  <view>sss</view>
  <view class="line"></view>
</view>

.ring {
  position: relative;
  margin: 40rpx auto;
  width: 80px; 
  height: 80px; 
  text-align: center; 
  line-height: 80px; 
  font-size: 20px; 
  letter-spacing: 4px; 
  background: transparent; 
  border: 2px solid #3c3c3c; 
  border-radius: 50%; 
  box-shadow: 0 0 20 rgba(0, 0, 0, .5); 
}
.ring::before {
  content: '';
  position: absolute;
  z-index: 99;
  top: -3px;
  left: -3px;
  width: 100%;
  height: 100%;
  border: 3px solid transparent;
  border-top: 3px solid #b3205d;
  border-right: 3px solid #b3205d;
  border-radius: 50%;
  animation: animateCircle 2s linear infinite; /* 动画：名称 时间 速率 重复 */
}
.line{
  display: block;
  position: absolute;
  top: calc(50% - 2px);
  left: 50%;
  width: 50%;
  height: 4px;
  background: transparent;
  transform-origin: left; /* 动画开始位置 */
  animation: animate 2s linear infinite;
  transform: rotate(45deg);
}
.line::before {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #b3205d;
  top: -4px;
  right: -4px;
  box-shadow: 0 0 20px #b3205d;
}
@keyframes animate {
  100% {
    transform: rotate(405deg); 
  }
}
@keyframes animateCircle {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

3.更多loading加载动画

https://gitee.com/susuhhhhhh/wxmini_demo