在做项目中 vue2改造vue3项目时的vuex 发生得一些变化

vue3项目中

先看下 stores.js

import { defineStore } from 'pinia'  引入方法注册方法
import { getListFieldLevel } from '..api/index.js'

export const useScreenStore = defineStore('screen', {
  state: () => ({
    fieldList: [],  定义
    instanceCodeOptions: ['11']
  }),
  actions: {  通过actions改变state的值
    async queryFieldList(vo) {
      try {
        let data
        let res = await getListFieldLevel(vo)
        data = res.data
        const fieldSelect = (data || []).map((item) => {
          let obj = {
            ...item,
            id: getInstanceType('333333')
          }
          return obj
        })
        this.fieldList = fieldSelect
        return fieldSelect
      } catch (err) {
        this.fieldList = []
        return []
      }
    },
    setInstanceCodeOptions(vo) {
      this.instanceCodeOptions = { ...this.instanceCodeOptions, ...vo }
    }
  }
})


function getInstanceType(item) {
  return Number(item)
}

• 外面使用

import { mapState, mapActions } from 'pinia'
import { useScreenStore } from '@/stores/screenStore'


computed: {
    ...mapState(
      useScreenStore, 
      {instanceCodeOptions: (store) => store.instanceCodeOptions || {} }
    ),
  },
 methods: {
           
    ...mapActions(useScreenStore, ['setInstanceCodeOptions']),
    //useScreenStore 知道是那个store下的方法    
    open(){
     this.setInstanceCodeOptions('444')  直接調用setInstanceCodeOptions方法
     console.log(this.instanceCodeOptions)
    }
  }