Today I add the Reachability classes to an app I am working on, added my #import Reachability.h to the correct files and then implemented a method to check if the device was using wifi. When I hit build, I got the following error. Undefined symbols for architecture i386: “_SCNetworkReachabilityCreateWithAddress”, referenced from: +[Reachability reachabilityWithAddress:] in Reachability.o […]