042、Vue3+TypeScript基础,pinia库存储数据修改的两种方式

01、main.ts代码如下:

// 引入createApp用于创建Vue实例
import {createApp} from 'vue'
// 引入App.vue根组件
import App from './App.vue'

//第一步:引入pinia
import {createPinia} from 'pinia'


const app = createApp(App);

//第二步:创建pinia实例
const pinia = createPinia()
//第三步:将pinia实例挂载到Vue实例上
app.use(pinia)

// App.vue的根元素id为app
app.mount('#app')

02、count.ts代码如下:

import {defineStore} from 'pinia'

export const useCountStore =
    defineStore('count', {
        //真正储存数据的地方
        state() {
            return {
                sum: 6,
                name: '张三',
                age: 18,
                talklist: [
                    {id: 'a001', title: '1今天你想我了没'},
                    {id: 'a002', title: '2今天你想我了没'},
                    {id: 'a003', title: '3今天你想我了没'},
                ]
            }
        }
    })

03、App.vue代码如下:

<template>
  <div class="app">
    <h2 class="title">App.Vue</h2>
    <Page1/>
    <br>
    <Page2/>
  </div>
</template>

<script lang="ts" setup name="App">
import Page1 from "@/view/Page1.vue";
import Page2 from "@/view/Page2.vue";
</script>

<style scoped>
.app {
  background-color: #ddd;
  box-shadow: 0 0 10px;
  border-radius: 10px;
  padding: 20px;
}

.nav-button {
  display: inline-block; /* 让链接显示为块级元素,以便应用宽度和高度 */
  padding: 10px 20px; /* 内边距 */
  margin: 0 5px; /* 外边距,用于按钮之间的间隔 */
  text-decoration: none; /* 移除下划线 */
  color: white; /* 文本颜色 */
  background-color: #007bff; /* 背景颜色 */
  border-radius: 5px; /* 边框圆角 */
  transition: background-color 0.3s; /* 平滑过渡效果 */
}

.nav-button:hover {
  background-color: #0056b3; /* 鼠标悬停时的背景颜色 */
}

.nav-button.router-link-active {
  background-color: #28a745; /* 当前激活(路由匹配)时的背景颜色 */
}

.mai-content {
  /* 添加边框样式 */
  border: 2px solid #000; /* 边框宽度、样式和颜色 */
  border-radius: 5px; /* 可选:添加边框圆角 */
  padding: 20px; /* 可选:给内部内容添加一些内边距 */
  margin: 20px; /* 可选:给元素添加一些外边距,以便与其他元素隔开 */
}
</style>

04、Page1.vue代码如下:

<template>
  <div class="mypage">
    <h2>当前求和为:{{ countStore.sum }}</h2>
    <h2>姓名:{{ countStore.name }} , 年龄{{ countStore.age }}</h2>
    <select v-model="n">
      <option :value="1">1</option>
      <option :value="2">2</option>
      <option :value="3">3</option>
    </select>
    <button @click="add"></button>
    <button @click="changeData">修改</button>
  </div>
</template>

<script lang="ts" name="page1" setup>
import {ref} from "vue";
import {useCountStore} from "@/store/count";

const countStore = useCountStore();

let sum = ref(1);
let n = ref(1);

function add() {
  countStore.sum += n.value;
}

function changeData() {
  countStore.$patch({
    sum: 888,
    name: "李四",
    age: 22
  })
}
</script>

<style scoped>
.mypage {
  background-color: #ddd;
  box-shadow: 0 0 10px;
  border-radius: 10px;
  padding: 20px;

  button {
    margin: 0 5px;
  }
}
</style>

05、Page2.vue代码如下:

<template>
  <div class="mypage">
    <ul>
      <li v-for="talk in myTalkStore.talklist"
          :key="talk.id">{{ talk.id }} -- {{ talk.title }}
      </li>
      <br>
      <li v-for="talk in myTalkStore.$state.talklist"
          :key="talk.id">{{ talk.id }} -- {{ talk.title }}
      </li>
    </ul>
  </div>
</template>

<script lang="ts" name="page2" setup>
import {useCountStore} from "@/store/count";

const myTalkStore = useCountStore();
</script>
<style scoped>
.mypage {
  background-color: #ddd;
  box-shadow: 0 0 10px;
  border-radius: 10px;
  padding: 20px;

  button {
    margin: 0 5px;
  }
}
</style>

06、效果如下:

 07、效果如下:

 

posted @ 2024-08-21 23:34  像一棵海草海草海草  阅读(57)  评论(0编辑  收藏  举报