这个是uni-app自定义loading的组件，以下是代码



<template>
<!-- visible控制toast的显隐，text为提示文本 -->
<view class="loading-toast" v-if="visible">
<view class="toast-mask"></view>
<view class="toast-tip">{{text}}</view>
</view>
</template>

<script>
export default {
name: "loading-toast",
props: {
text: {
type: String,
default: "加载中..."
},
visible: {
type: Boolean,
default: false
}
}
}
</script>

<style>
.loading-toast {
min-width: 200upx;
min-height: 200upx;
max-width: 500upx;
display: flex;
align-items: center;
justify-content: center;
flex-direction: column;
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
z-index: 9999;
font-size: 26upx;
color: #fff;
background: rgba(0, 0, 0, 0.7);
border-radius: 10upx;
}

.toast-mask {
width: 50upx;
height: 50upx;
border: 3px solid #fff;
border-radius: 50%;
margin: 0 6px;
display: inline-block;
vertical-align: middle;
clip-path: polygon(0% 0%, 100% 0%, 100% 40%, 0% 40%);
animation: rotate 1s linear infinite;
margin-bottom: 36upx;
}

@-webkit-keyframes rotate {
from {
transform: rotatez(0deg);
}

to {
transform: rotatez(360deg);
}
}

@keyframes rotate {
from {
transform: rotatez(0deg);
}

to {
transform: rotatez(360deg);
}
}
</style>