在NetworkReachability上调用“GetFlags”总是返回“Reachable”，即使该域不存在。我将附上完整的测试解决方案，但以下内容代码应导致“Failed...”但结果为“Success=True”。代码基于Reachability示例。publicoverridevoidViewDidLoad(){base.ViewDidLoad();//Performanyadditionalsetupafterloadingtheview,typicallyfromanib.stringhost="http://nonsense.test12345679.com";usin