title: Xcode get error when using Coapod
body: <p>I'm using Cocoapod to get Global Lib. It works fine in the simulator, but it has some error when I build on my device:</p>
  
  <pre><code>Undefined symbols for architecture armv7s:
    "_OBJC_CLASS_$_FBRequest", referenced from:
        objc-class-ref in HomeViewController.o
    "_OBJC_CLASS_$_SBJsonParser", referenced from:
        objc-class-ref in IQRequest.o
    "_AFNetworkingOperationFailingURLResponseErrorKey", referenced from:
        ___78-[IQRequest performQueueOperationWithRequest:withSuccessBlock:andFailedBlock:]_block_invoke39 in IQRequest.o
    "_OBJC_CLASS_$_AFHTTPRequestOperation", referenced from:
        objc-class-ref in IQRequest.o
    "_OBJC_CLASS_$_AFHTTPClient", referenced from:
        objc-class-ref in IQRequest.o
    "_OBJC_CLASS_$_FBSession", referenced from:
        objc-class-ref in ChooseDesignerViewController.o
        objc-class-ref in IQUser.o
        objc-class-ref in IQAppDelegate.o
  ld: symbol(s) not found for architecture armv7s
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>What has happened to my project?</p>