1.创建文件

stores
-index.js
-global.js

2.对应文件内容 index.js
安装插件 npm i pinia-plugin-persistedstate

import { createPinia } from 'pinia';
import persist from 'pinia-plugin-persistedstate';
const pinia = createPinia();
pinia.use(persist);
export default pinia;

3.对应文件内容 global.js

import { defineStore } from 'pinia';
import { ref,reactive } from "vue";export const useGlobalStore = defineStore('global', () => {const tabBarStatus = ref('1');const system = ref({})const changeTabBarStatus = (status) => {tabBarStatus.value = status; // 示例：改变 tabBarStatus 的值};const setSystem=(options)=>{system.value=options;}const getSystem=()=>{return system.value;}return { tabBarStatus, system,changeTabBarStatus,setSystem,getSystem};
},
{// 网页端配置// persisit:true,// 小程序端  修改其设置 获取方法persist:{storage:{getItem(key){return uni.getStorageSync(key);},setItem(key,value){uni.setStorageSync(key,value);}}}});

4.注册到main.js中

import App from './App'
// #ifndef VUE3
import Vue from 'vue'
import './uni.promisify.adaptor'
Vue.config.productionTip = false
App.mpType = 'app'
const app = new Vue({...App
})
app.$mount()
// #endif// #ifdef VUE3
import { createSSRApp } from 'vue'
import pinia from '@/stores/index'
export function createApp() {const app = createSSRApp(App)app.use(pinia);return {app}
}
// #endif

如果想在utils 下的工具中使用可以使用一下写法

import pinia from '@/stores/index.js'
import { useGlobalStore } from "@/stores/global";
const globalStore = useGlobalStore(pinia)
export default {getUploadImageDomainName(){return  globalStore.system.img_host;}
}