A brief discussion on two methods of transferring values ​​between pages in mini programs

This article will introduce to you two methods of value transfer between pages in WeChat mini programs. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

1: url transfer with parameters

Like front-end languages, transfer between mini program pages You can add parameters after the routing url, and the parameters will be passed to the new page during routing.

index.wxml:

<!--index.wxml-->
<view class="container">
  <!-- 使用navigator组件 -->
  <navigator url="../demo/demo?title=参数传递">title=参数传递</navigator>
</view>

demo.js

// pages/demo/demo.js
Page({
 
  data: {
    title:''
  },
 
  onLoad: function (options) {
    console.log(options)  //打印options,可以看到title的值可以获取到
    this.setData({
      title:options.title  //为页面中title赋值
    })
  },
 
})

demo.wxml

<!--pages/demo/demo.wxml-->
<view class=&#39;container&#39;>
  {{title}}
</view>

Rendering:

           

Two: Will Values ​​are stored in global variables

We can also store the required values ​​​​in global variables and directly reference them where needed.

app.js

//app.js
App({
  globalData: {}
})

index.wxml

<!--index.wxml-->
<!-- 点击触发goto_demo函数 -->
<view class="container" bindtap=&#39;goto_demo&#39;> 
  title=参数传递
</view>

index.js

//index.js
//获取应用实例
const app = getApp()
 
Page({
  data: {
    title:'参数传递'
  },
 
  goto_demo: function() {
    app.globalData.title = this.data.title
    wx.navigateTo({
      url: '../demo/demo',
    })
  }
})

demo.js

// pages/demo/demo.js
//获取应用实例
const app = getApp()
 
Page({
 
  data: {
    title:''
  },
 
  onLoad: function (options) {
    console.log(app.globalData.title)  //打印options,可以看到title的值可以获取到
    this.setData({
      title: app.globalData.title  //为页面中title赋值
    })
  },
 
})

Required When using global variables, remember to get the application instance first: const app = getApp()

The rendering is the same as above.

Related learning recommendations: Small Program Development Tutorial

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