enum DevelopEvent { ///开发环境 dev, ///测试环境 test, ///正式环境 formal } class BasicConfigurationManager { factory BasicConfigurationManager() => _getInstance(); static BasicConfigurationManager? _instance; //服务器地址 String? baseUrl; //SessionId String? sessionId; BasicConfigurationManager._internal(){ DevelopEvent developType = DevelopEvent.dev; if (developType == DevelopEvent.test) { baseUrl = 'http://wow-app.dev.kouyuxingqiu.com'; } else if(developType == DevelopEvent.dev) { baseUrl = 'http://wow-app.dev.kouyuxingqiu.com'; } else { baseUrl = 'http://wow-app.dev.kouyuxingqiu.com'; } sessionId = ''; } static BasicConfigurationManager _getInstance() { _instance ??= BasicConfigurationManager._internal(); return _instance!; } }