pinia 商店中的状态更改后 vue 组件不更新

Question

我目前正在开发我的第一个 vue 应用程序，目前正在构建登录逻辑。 对于状态管理，正在使用 pinia。我创建了一个 Pinia Store 来全局管理“isLoggedIn”状态。

import { defineStore } from "pinia";

export const useLoginStatusStore = defineStore('loginStatus', {
    id: 'loginStatus',
    state: () => ({
        isLoggedIn: false
    }),
    actions: {
        logIn() {
            this.isLoggedIn = true
            console.log("Login", this.isLoggedIn)
        },
        logOut() {
            this.isLoggedIn = false
            console.log("Logout", this.isLoggedIn)
        }
    }
})

到目前为止一切顺利，一切正常，我可以访问组件和路由器文件中的状态和操作。

**<roouter.js>**

import { createRouter, createWebHistory } from 'vue-router'
import { createPinia } from 'pinia'
import { createApp, ref } from 'vue'
import { useLoginStatusStore } from '../stores/loginStatus.js'

import App from '../App.vue'
import WelcomeView from '../views/public/WelcomeView.vue'
import SplashView from '../views/public/SplashView.vue'

const pinia = createPinia()
const app = createApp(App)
app.use(pinia)

const loginStatusStore = useLoginStatusStore()
let isLoggedIn = ref(loginStatusStore.isLoggedIn)

console.log("isLoggedIn", loginStatusStore.isLoggedIn)


const router = createRouter({
  history: createWebHistory(import.meta.env.BASE_URL),
  routes: [
    {
      path: '/',
      name: 'splash',
      component: SplashView
    },
    {
      path: '/welcome',
      name: 'welcome',
      component: WelcomeView
    },
    {
      path: '/login',
      name: 'login',
      component: () => import('../views/public/LoginView.vue')
    },
    {
      path: '/signup',
      name: 'signup',
      component: () => import('../views/public/SignUpView.vue')
    },
    {
      path: '/resetpassword',
      name: 'resetpassword',
      component: () => import('../views/public/ForgotPasswordView.vue')
    },
    {
      path: '/home',
      name: 'home',
      component: () => import('../views/protected/HomeView.vue'),
      meta: { requiresAuth: true }
    },
    {
      path: '/sounds',
      name: 'sounds',
      component: () => import('../views/protected/SoundsView.vue'),
      meta: { requiresAuth: true }
    },
    {
      path: '/player',
      name: 'soundPlayer',
      component: () => import('../views/protected/SoundPlayerView.vue'),
      meta: { requiresAuth: true }
    },
    {
      path: '/profile',
      name: 'profile',
      component: () => import('../views/protected/ProfileView.vue'),
      meta: { requiresAuth: true }
    },
    {
      path: '/meditation',
      name: 'meditation',
      component: () => import('../views/protected/MeditationView.vue'),
      meta: { requiresAuth: true }
    },
    {
      path: '/tools',
      name: 'tools',
      component: () => import('../views/protected/ToolsView.vue'),
      meta: { requiresAuth: true }
    }
  ]
})

router.beforeEach((to, from, next) => {
  if (to.meta.requiresAuth) {
    console.log("Router", isLoggedIn.value)
    if (!isLoggedIn.value) {
      next({
        name: 'welcome'
      })
    } else {
      next()
    }
  } else {
    next()
  }
})

export default router

在路由器中它用于受保护的路由，在 App.vue 中用于有条件的 class 渲染。

问题是，当状态更新时，它不会在组件中更新，组件本身也不会更新。我尝试在 pinia 中使用 $subscribe 方法，但没有成功。我知道，这里需要的是能够产生反应性的东西。但不知道如何做到这一点。非常感谢您对此提供的任何帮助:)

感谢阅读

**App.vue**

<script setup>
import { RouterView } from 'vue-router';
import DevNavItem from '@/components/header/DevNavItem.vue'
import HeaderItem from '@/components/header/HeaderItem.vue'
import FooterItem from '@/components/footer/FooterItem.vue'
import { useLoginStatusStore } from './stores/loginStatus.js';

const loginStatusStore = useLoginStatusStore()
const isLoggedIn = loginStatusStore.isLoggedIn

console.log("App.vue", loginStatusStore.isLoggedIn)

</script>

<template>
  <DevNavItem />
  <HeaderItem v-if="isLoggedIn" />
  <RouterView :class="isLoggedIn ? 'mainProtected' : 'mainPublic'" />
  <FooterItem v-if="isLoggedIn" />
</template>

<style>
/*FONT-IMPORT*/
@import url("@/assets/font/alegreya_font.scss");

/* GENERAL STYLES */

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
header {
  position: top;
}
.mainProtected {
  width: 100vw;
  height: 83vh;
  overflow: hidden;
}
.mainPublic {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* GLOBAL CLASSES */

.mainLogo {
  height: 350px;
  width: 350px;
  background: url("./img/icons/main.png") center/cover no-repeat;
}
.leavesBackground {
  background-color: #253334;
  background-image: url("./src/img/images/background_partial.png");
  background-repeat: no-repeat;
  background-position: bottom;
  background-size: contain;
}
.logoSmall {
  background: url("./img/icons/main.png") center/contain no-repeat;
  height: 100px;
  width: 100px;
}
.buttonPublic {
  padding: 20px 0;
  text-align: center;
  background-color: #7c9a92;
  color: #fff;
  border-radius: 15px;
  width: 90%;
  text-decoration: none;
  font-size: 24px;
  border: none;
}
</style>

我尝试用 $subscribe 订阅状态​​，但没有成功。

Answer 1

storeToRefs()

您需要使用 storeToRefs() 从商店中提取属性，同时保持这些属性的反应性。

import { storeToRefs } from 'pinia'
const themeStore = useThemeStore();
const { isDark } = storeToRefs(themeStore);

---

从 Pinia 商店获取反应状态的错误方法：

我在下面列出的从 Pinia 商店获取 state（属性、吸气剂）的所有方法都是 错误的:

import { useThemeStore } from "./stores/theme.js";
const themeStore = useThemeStore();

// WRONG ways of extracting state from store
let isDark = themeStore.isDark; // not reactive
let isDark = ref(themeStore.isDark); // not reactive
let { isDark } = themeStore; // not reactive, cannot destructure

---

直接从商店解构actions。

这里值得一提的是，“您 可以 直接从商店解构操作，因为它们绑定到商店本身。” (docs)

如果您的商店中有一个名为“增量”的操作，您可以直接从组件中的商店中提取它：

...
const { increment } = store // actions can be destructured directly
...

---

此外，根据Pinia docs，第一个参数是unique ID，因此您不需要在选项对象中再次指定id。或者您可以忽略第一个参数并仅将 id 指定为选项。哪种方式都可以。