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首先自定义一个加载中组件

ccloading.vue

<template><view class="request-loading-view" v-if="loadingShow"><view class="loading-view"><image class="loading-img" :src="loading" mode="aspectFit"></image></view></view>
</template><script setup>
import loading from "@/assets/images/loading.gif"
import {useCommonStore} from "@/store/common";
import {computed} from "vue";
const commonStore = useCommonStore();
const loadingShow=computed(()=> commonStore.showLoading)
</script><style scoped>
.request-loading-view {position: fixed;top: 0;left: 0;width: 100vw;height: 100vh;z-index: 999999;background-color: #fff;display: flex;justify-content: center;align-items: center;
}.loading-view {width: 100rpx;height: 140rpx;/* background-color: rgba(0, 0, 0, 0.6); */border-radius: 20rpx;display: flex;justify-content: center;align-items: center;
}.loading-img {width: 100%;height: 100%;
}
</style>

然后再pina里面保存这个 showLoading的值。判断是否显示加载中。也就是上面引入的

/store/common.ts文件

import { defineStore } from 'pinia'
import piniaPersistConfig from "@/store/helper/persist";//因为persist不支持小程序的缓存。所以再这个页面重写了一下存储方式。参考这个export interface State {showLoading: boolean;
}
// @ts-ignore
export const useCommonStore = defineStore('pack-store', {persist: piniaPersistConfig("pack-store"),state: (): State => ({showLoading:false,//loading是否显示}),getters: {},actions: {setChangeLoading(data:boolean){console.log("changeLoading",data)this.showLoading = data;},},
});

 main.js定义全局组件。定义全局函数

import { createSSRApp } from "vue";
import  Vue from "vue";
import App from "./App.vue";
import store from "./store";import {useCommonStore} from "@/store/common";
import newRequestLoading from '@/components/ccloading/ccloading.vue';export function createApp() {const app = createSSRApp(App);app.use(store);app.component('new-loading', newRequestLoading);const commonStore = useCommonStore();// 添加全局属性方法app.config.globalProperties.$loadingStatus=commonStore.showLoading;app.config.globalProperties.$loading = {show() {commonStore.setChangeLoading(true);},hide() {commonStore.setChangeLoading(false);}}return {app,};
}

然后就可以在页面使用了

index.vue

<template><new-loading/>
</template>

<script setup lang="ts">
import {ref, reactive, getCurrentInstance} from "vue";

const instance = getCurrentInstance()?.proxy

onLoad((options) => {instance.$loading.show();//显示加载中getHide();
})

 const getHide=()=>{

instance.$loading.hide();//隐藏加载中

}