npm install --save mobx-miniprogram@4.13.2 mobx-miniprogram-bindings@1.2.1

import {observable,action} from 'mobx-miniprogram' 
 
export const store = observable({ //2、創(chuàng)建共享數(shù)據(jù)，并向外暴露出去
    //定義數(shù)據(jù)字段
    namesValue:'文龍剛',
    shopCarTotalCount:0,//購物車數(shù)量
    sitesPosition:wx.getStorageSync('sitesInfo')||'',//提貨點(diǎn)
    RestDay:true,
 
    shopTotalCount:action(function(step){//購物車總數(shù)
        console.log('傳遞過來的值是：',step)
        this.shopCarTotalCount+=step
    }),
    setSitesPosition:action(function(position){//設(shè)置提貨點(diǎn)
      this.sitesPosition=position
    }),
    getRestDay:action(function(type){
      this.RestDay=!this.RestDay
    })
})

<view>
  <!-- 這是調(diào)用參數(shù)的方法 -->
  <view>
    namesValue:{{namesValue}}
  </view>
  <!-- 這是調(diào)用方法的 -->
  <view>
    購物車數(shù)量：{{shopCarTotalCount}}
  </view>
  <view>
    <button bindtap="addShopCarTotalCount" data-step='1'>增加</button>
  </view>
 
  <!-- 更改狀態(tài) -->
  <view>
    當(dāng)前狀態(tài)：{{RestDay}}
  </view>
  <button bindtap="changeType">更改狀態(tài)</button>
</view>

import {createStoreBindings} from 'mobx-miniprogram-bindings'
import {store} from '../../libs/store.js'
//因?yàn)槲沂菍tore.js文件放在libs中了

Page({
    onLoad(options) {
        //第二步：這是store中參數(shù)及方法的導(dǎo)入
        this.storeBindings = createStoreBindings(this, {
            store,
            fields: ['namesValue','shopCarTotalCount', 'RestDay', 'sitesPosition'],
            actions: ['shopTotalCount',  'setSitesPosition','getRestDay'],
        })
  },
 
})

import {createStoreBindings} from 'mobx-miniprogram-bindings'
import {store} from '../../libs/store.js'

Page({
  behaviors:[storeBindingsBehavior],
  storeBindings:{
    // 數(shù)據(jù)源
    store, //指定要綁定的store
    fields:{//指定要綁定的字段數(shù)據(jù)
      numA:()=>store.numA,     //綁定字段的第一種方式
      numB:(store)=>store.numB,//綁定字段的第二種方式
      sum:'sum',               //綁定字段的第三種方式
    },
    actions:{ //指定要綁定的方法
      updateNum2:'updateNum2'
    }
  },
})

//組件的 .wxml結(jié)構(gòu)
<view>{{numA}}+{{numB}}={{sum}}</view>
<van-button type="primary" bindtap="btnHander2" data-step="{{1}}">numB+1</van-button>
<van-button type="danger" bindtap="btnHander2" data-step="{{-1}}">numB-1</van-button>

//組件的 .js結(jié)構(gòu)
methods: {
  btnHander2(e){
    this.updateNum2(e.target.dataset.step)
  }
}