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效果展示

一、需求背景：

# vue3 项目涉及很多图表加载、表格加载 #考虑手写一个动态加载组件

二、实现思路

通过一个加载状态变量，通过v-if判断，加载状态的变量等于哪一个，动态加载组件内部就显示的哪一块组件。

三、实现效果

四、代码

(一)、封装组件

<template><view class="loadding_contaniers" v-if="loadState == 1"><view class="loading_img"><image src="@/static/images/smartCabin/loadingImg/isLoading_bg.png" /></view><view class="imgTitle">加载中<text id="dot">...</text></view></view><view class="loadding_contaniers" v-else-if="loadState == 2"><view class="loading_img"><image src="@/static/images/smartCabin/loadingImg/isErr_bg.png" /></view><view class="imgTitle">请求失败，请重新加载！</view></view><view class="loadding_contaniers" v-else-if="loadState == 3"><view class="loading_img"><image src="@/static/images/smartCabin/loadingImg/isNone_bg.png" /><!-- <image:src="getAssetsFile(props.noticeTip == '暂无数据'? `smartCabin/loadingImg/isNone_bg.png`: `smartCabin/loadingImg/isErr_bg2.png`)"/> --></view><view class="imgTitle">{{ noticeTip }}</view></view><view class="loadding_sucess" v-else><slot> </slot></view>
</template><script>
export default {props: {// 1:加载中 2：加载失败 3：暂无数据 4：加载成功loadState: Number,noticeTip: {type: String,default: "暂无数据",},},
};
</script><style lang="scss">
.loadding_contaniers {width: 100%;height: 100%;display: flex;flex-direction: column;align-items: center;justify-content: center;.loading_img {image {width: 260rpx;height: 260rpx;}}.imgTitle {flex: 1;height: 0;color: #757575;#dot {display: inline-block;width: 1.5em;vertical-align: bottom;overflow: hidden;animation: dotting 0.5s infinite step-start;}@keyframes dotting {0% {width: 0;margin-right: 1.5em;}33% {width: 0.5em;margin-right: 1em;}66% {width: 1em;margin-right: 0.5em;}100% {width: 1.5em;margin-right: 0;}}}
}
.loadding_sucess {width: 100%;height: 100%;display: flex;justify-content: center;align-items: center;
}
</style>

 (二)、组件传参

h5使用

<LoaddING :loadState="4" :noticeTip="'当loadState是成功的时候'"><view class="myContent"><imagesrc="@/static/images/energy/elePower/receiving_power.png"/></view>
</LoaddING>

web端使用 

<LoaddING :loadState="data.isFinish" :noticeTip="data.isTips"><!-- 插槽组件 --><ewClickLine:yAxisUnit="echartData2.unit":seriesColor="echartData2.color":legend="{ show: true, x: '80%' }":seriesName="echartData2.name":seriesType="echartData2.chartSeriesType":xAxisValue="echartData2.lineXAxisValue":nums="echartData2.lineNums"></ewClickLine>
</LoaddING>