iphone - 可达性类别错误

Question

Xcode 4.2、iOS 5.0我的项目启用了 ARC，当在我的项目中添加非 ARC Reachabilty 类时，出现以下错误:

Undefined symbols for architecture i386:
  "_SCNetworkReachabilitySetCallback", referenced from:
      -[Reachability startNotifier] in Reachability.o
  "_SCNetworkReachabilityScheduleWithRunLoop", referenced from:
      -[Reachability startNotifier] in Reachability.o
  "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from:
      -[Reachability stopNotifier] in Reachability.o
  "_SCNetworkReachabilityCreateWithName", referenced from:
      +[Reachability reachabilityWithHostName:] in Reachability.o
  "_SCNetworkReachabilityCreateWithAddress", referenced from:
      +[Reachability reachabilityWithAddress:] in Reachability.o
  "_SCNetworkReachabilityGetFlags", referenced from:
      -[Reachability connectionRequired] in Reachability.o
      -[Reachability currentReachabilityStatus] in Reachability.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

您添加的库似乎只是为设备构建的，而不是为模拟器构建的(这就是为什么它说“找不到架构 i386”)。

找到代码并将其直接添加到您的项目中，您应该能够为设备和模拟器进行构建。