Undefined symbols for architecture arm64

[NishaParmar]

Hi i am getting this can anyone help me?

1. Undefined symbols for architecture arm64:
   "RegisterStaticallyLinkedModulesGranular()", referenced from:
   RegisterStaticallyLinkedModules() in libiPhone-lib.a(RegisterStaticallyLinkedModules.o)
   "RegisterAllStrippedInternalCalls()", referenced from:
   RegisterAllInternalCalls() in libiPhone-lib.a(MonoICallRegistration.o)
   "RegisterAllClasses()", referenced from:
   InitializeEngineNoGraphics() in libiPhone-lib.a(SaveAndLoadHelper.o)
   ld: symbol(s) not found for architecture arm64

ld: warning: object file (/Users/name/Documents/Apps/Augmentedreality/Demo2Integrate/AR/Libraries/Plugins/iOS/libVuforiaUnityPlayer.a(FrameCounter.o)) was built for newer iOS version (9.2) than being linked (7.0)
clang: error: linker command failed with exit code 1 (use -v to see invocation)

2. second thing is
   NS_INLINE UnityAppController* GetAppController()
   {
   NSObject* delegate = [UIApplication sharedApplication].delegate;
   UnityAppController* currentUnityController = (UnityAppController *)[delegate valueForKey:@"unityController"];
   return currentUnityController;
   }
   here valueForKey:@"unityController" is giving error which key i should write?
   VuforiaNativeRendererController valueForUndefinedKey is not key value coding-compliant for the key unityController

3. Lexical or preprocesser issue AppDelagate.h file not found http://www.screencast.com/t/PAWSv0kGesJ

[Frobei]

Hi, did you manage to resolve your first problem ? I got something similar but I don't know how to fix it.