// app.js

App({

  onLaunch() {

    console.log('微信版本:', wx.getSystemInfoSync().version);

    console.log('基础库版本:', wx.getSystemInfoSync().SDKVersion);

    if (wx.canIUse('loadSubpackage')) {

      wx.loadSubpackage({

        name: 'packageCharts',

        success: () => console.log('图表分包预加载成功'),

        fail: (err) => console.error('图表分包预加载失败', err)

      });

    } else {

      console.warn('当前基础库不支持分包加载API，请升级微信客户端');

      // 可以在这里加载主包中的备用资源

    }

//app.json

"pages": [

    "pages/index/index",

    "pages/home/home",

    "pages/device/device",

    "pages/seted/seted"

  ],

  "subPackages": [

    {

      "root": "packageCharts",

      "pages": ["pages/chartPage"],

      "independent": false   

    },

    {

      "root": "packageSetting",

      "pages": [

        "pages/longin/longin",

        "pages/seting/seting",

        "pages/manual/manual"

      ]

    }

  ],

  "preloadRule": {

    "pages/home/home": {

      "network": "all",

      "packages": ["packageSetting","packageCharts"]

    }

  },

运行真机测试的日志如下：

微信版本: 8.0.61

app.js? [sm]:5 基础库版本: 3.8.10

app.js? [sm]:6 当前基础库不支持分包加载API，请升级微信客户端