I'm trying to work with reachability in my project. I added Reachability.h and Reachability.m files. But after building project xCode shows me strange errors:
Undefined symbols for architecture i386: "_SCNetworkReachabilityCreateWithName", referenced from: +[Reachability reachabilityWithHostname:] in Reachability.o "_SCNetworkReachabilityCreateWithAddress", referenced from: +[Reachability reachabilityWithAddress:] in Reachability.o "_SCNetworkReachabilitySetCallback", referenced from: -[Reachability startNotifier] in Reachability.o -[Reachability stopNotifier] in Reachability.o "_SCError", referenced from: -[Reachability startNotifier] in Reachability.o "_SCErrorString", referenced from: -[Reachability startNotifier] in Reachability.o "_SCNetworkReachabilitySetDispatchQueue", referenced from: -[Reachability startNotifier] in Reachability.o -[Reachability stopNotifier] in Reachability.o "_SCNetworkReachabilityGetFlags", referenced from: -[Reachability isReachable] in Reachability.o -[Reachability isReachableViaWWAN] in Reachability.o -[Reachability isReachableViaWiFi] in Reachability.o -[Reachability connectionRequired] in Reachability.o -[Reachability isConnectionOnDemand] in Reachability.o -[Reachability isInterventionRequired] in Reachability.o -[Reachability reachabilityFlags] in Reachability.o
Probably you forgot to add the SystemConfiguration.framework to your project. If you don't know how to add a framework have a look at this SO question.