Ошибка компиляции SCNetworkReachability

Я попытался скомпилировать пример кода Ercia Sadun здесь, но эта ошибка возникла:

warning: in /Users/interdev/iphone source code/Web Browser/Classes/SystemConfiguration.framework/SystemConfiguration, missing required architecture i386 in file
    Undefined symbols:
      "_SCNetworkReachabilityScheduleWithRunLoop", referenced from:
          +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o
      "_SCNetworkReachabilityCreateWithAddress", referenced from:
          +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o
          +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o
      "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from:
          +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o
      "_SCNetworkReachabilitySetCallback", referenced from:
          +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o
          +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o
          +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o
      "_SCNetworkReachabilityGetFlags", referenced from:
          +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o
          +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o
    ld: symbol(s) not found
    collect2: ld returned 1 exit status
        "_SCNetworkReachabilityScheduleWithRunLoop", referenced from:
            +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o
        "_SCNetworkReachabilityCreateWithAddress", referenced from:
            +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o
            +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o
        "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from:
            +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o
        "_SCNetworkReachabilitySetCallback", referenced from:
            +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o
            +[UIDevice(Reachability) scheduleReachabilityWatcher:] in UIDevice-Reachability.o
            +[UIDevice(Reachability) unscheduleReachabilityWatcher] in UIDevice-Reachability.o
        "_SCNetworkReachabilityGetFlags", referenced from:
            +[UIDevice(Reachability) hostAvailable:] in UIDevice-Reachability.o
            +[UIDevice(Reachability) pingReachabilityInternal] in UIDevice-Reachability.o
      ld: symbol(s) not found
      collect2: ld returned 1 exit status
    Build failed (5 errors)

... Даже после того, как я добавил systemConfiguration.framework, он сообщил о той же ошибке. Почему он это сделал, и как я могу заставить его работать?

Ответ 1