微信小程序开发必须要有域名

// 在小程序的app.json中配置服务器域名
{
  "networkTimeout": {
    "request": 10000,
    "downloadFile": 10000
  },
  "navigateToMiniProgramAppIdList": [
    "wxxxxxxxx"
  ],
  "setting": {
    "packNpmManually": true,
    "packNpmRelationList": [
      {
        "packageJsonPath": "./package.json",
        "miniprogramNpmDistDir": "./miniprogram/"
      }
    ]
  },
  "sitemapLocation": "sitemap.json",
  "usingComponents": {},
  "window": {
    "backgroundTextStyle": "light",
    "navigationBarBackgroundColor": "#fff",
    "navigationBarTitleText": "微信小程序",
    "navigationBarTextStyle": "black"
  },
  "debug": true,
  "setting": {
    "uploadFileMaxSize": 20 * 1024 * 1024,
    "requestDomain": ["https://yourdomain.com"], // 配置请求域名
    "uploadFileDomain": ["https://yourdomain.com"], // 配置上传文件域名
    "downloadFileDomain": ["https://yourdomain.com"] // 配置下载文件域名
  }
}