Firebase的 .info/connected 仅表示您的应用程序是否已连接到其Firebase数据库后端.它不检测常规网络连接.

Firebase's .info/connected only signals whether your app is connected to its Firebase Database backend. It does not detect general network connectivity.

要确定后者，请尝试使用[此列表]中的许多答案之一.包括如何检查活动的Internet是在iOS还是OSX上进行连接?，>检测Internet的最简单方法在iOS上连接?，然后检查与Swift的互联网连接

To determine the latter, try one of the many answers from [this list]. Including How to check for an active Internet connection on iOS or OSX?, Easiest way to detect Internet connection on iOS?, and Check for internet connection with Swift.