reader/store/index.js

// 该文件用于创建store实例
import {
  action,
  observable
} from 'mobx-miniprogram'

export const store = observable({
  // 数据字段
  userInfo: {},
  // 计算属性
  get sum() {
    return this.numA + this.numB
  },
  // actions
  setUser: action(function (step) {
    let grade = step.grade
    var gradeObj = {
      "PRIMARY_FIRST_GRADE": "一年级",
      "PRIMARY_SECOND_GRADE": "二年级",
      "PRIMARY_THREE_GRADE": "三年级",
      "PRIMARY_SENIOR_GRADE": "四年级",
      "PRESCHOOL": "学前班",
    }
    step.gradeName = grade ? gradeObj[grade] : '请选择'
    this.userInfo = step
  })
})