我工程中只接入WFChatClient.framk,然后- (BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions方法中调用 [[WFCCNetworkService sharedInstance] setServerAddress:@"" port:8888];方法以及[[WFCCNetworkService sharedInstance] connect:@"userid" token:@"token"],一直在连接中。。。。。。。如果用Wildfire ChatDemo替换IM_SERVER_HOST和IM_SERVER_PORT是可以连接成功的,是什么原因的?求解答,谢谢了