1.创建分包-文件夹
subPackages

app.json中写入subPackges对象，在里面写分包路径

{
  "pages": [
    "pages/index/index"
   ],
  "subPackages": [
    {
      "root": "subPackages",
      "name": "分包A",
      "pages": [
        "pages/personal/tencent_isux/index"
      ]
    }
  ],
  "window": {
    "backgroundTextStyle": "light",
    "navigationBarBackgroundColor": "#fff",
    "navigationBarTitleText": "WeChat",
    "navigationBarTextStyle": "black"
  }
}

如果在引入分包路径的时候报以下错误

解决办法：
1.在微信开发者工具中，右上角点击详情

2.在project.config.json文件夹中找到setting，并新增

"ignoreUploadUnusedFiles": false,
"ignoreDevUnusedFiles": false