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POLinker can't find _objc_msgSend and many other symbols
 

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  1. POLinker can't find _objc_msgSend and many other symbols
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    <p>So , i have two problems with Xcode . I'm new in the iPhone app development so that any help would be useful . I'm creating an app with a mapView , so first i did everything as it should be . Declaration , view did load , delegates and so on . After that i connected it the property to the map view , and it turned out 28 errors..On the simulator it works , including the map , but on the phone it always breaks . And after that i deleted all the code that's for the map view, it stayed the same . </p> <p>Some ideas what could this be ? how to make a map view for iPhone ?</p> <pre><code>"_OBJC_CLASS_$_NSBundle", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_NSFileManager", referenced from: objc-class-ref in AppDelegate.o "_objc_msgSendSuper2", referenced from: -[AppDelegate dealloc] in AppDelegate.o -[MainViewController didReceiveMemoryWarning] in MainViewController.o -[MainViewController viewDidLoad] in MainViewController.o -[MainViewController viewDidUnload] in MainViewController.o -[MainViewController viewWillAppear:] in MainViewController.o -[MainViewController viewDidAppear:] in MainViewController.o -[MainViewController viewWillDisappear:] in MainViewController.o ... "_objc_setProperty", referenced from: -[AppDelegate setWindow:] in AppDelegate.o -[MainViewController setManagedObjectContext:] in MainViewController.o -[MainViewController setOdaberiTaxi:] in MainViewController.o -[MainViewController setIzbornik:] in MainViewController.o -[MainViewController setTaxiPicker:] in MainViewController.o -[MainViewController setListaTaxiZG:] in MainViewController.o -[MainViewController setToolbar:] in MainViewController.o ... "__objc_empty_vtable", referenced from: _OBJC_CLASS_$_AppDelegate in AppDelegate.o _OBJC_METACLASS_$_AppDelegate in AppDelegate.o _OBJC_CLASS_$_MainViewController in MainViewController.o _OBJC_METACLASS_$_MainViewController in MainViewController.o _OBJC_CLASS_$_FlipsideViewController in FlipsideViewController.o _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o "_OBJC_CLASS_$_UIResponder", referenced from: _OBJC_CLASS_$_AppDelegate in AppDelegate.o "_objc_msgSend", referenced from: _main in main.o -[AppDelegate dealloc] in AppDelegate.o -[AppDelegate application:didFinishLaunchingWithOptions:] in AppDelegate.o -[AppDelegate applicationWillTerminate:] in AppDelegate.o -[AppDelegate saveContext] in AppDelegate.o -[AppDelegate managedObjectContext] in AppDelegate.o -[AppDelegate managedObjectModel] in AppDelegate.o ... "_OBJC_CLASS_$_UIActionSheet", referenced from: objc-class-ref in MainViewController.o "_OBJC_CLASS_$_UIViewController", referenced from: _OBJC_CLASS_$_MainViewController in MainViewController.o _OBJC_CLASS_$_FlipsideViewController in FlipsideViewController.o "_objc_autoreleasePoolPop", referenced from: _main in main.o "__objc_empty_cache", referenced from: _OBJC_CLASS_$_AppDelegate in AppDelegate.o _OBJC_METACLASS_$_AppDelegate in AppDelegate.o _OBJC_CLASS_$_MainViewController in MainViewController.o _OBJC_METACLASS_$_MainViewController in MainViewController.o _OBJC_CLASS_$_FlipsideViewController in FlipsideViewController.o _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o "_UIApplicationMain", referenced from: _main in main.o "_OBJC_METACLASS_$_UIResponder", referenced from: _OBJC_METACLASS_$_AppDelegate in AppDelegate.o "_OBJC_CLASS_$_UIView", referenced from: objc-class-ref in MainViewController.o "_OBJC_CLASS_$_UIApplication", referenced from: objc-class-ref in MainViewController.o "_OBJC_CLASS_$_NSArray", referenced from: objc-class-ref in MainViewController.o "_OBJC_CLASS_$_NSManagedObjectContext", referenced from: objc-class-ref in AppDelegate.o "___CFConstantStringClassReference", referenced from: CFString in AppDelegate.o CFString in AppDelegate.o CFString in AppDelegate.o CFString in AppDelegate.o CFString in MainViewController.o CFString in MainViewController.o CFString in MainViewController.o ... "_OBJC_CLASS_$_UIAlertView", referenced from: objc-class-ref in MainViewController.o "_OBJC_METACLASS_$_UIViewController", referenced from: _OBJC_METACLASS_$_MainViewController in MainViewController.o _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o "_NSSQLiteStoreType", referenced from: -[AppDelegate persistentStoreCoordinator] in AppDelegate.o "_objc_autoreleasePoolPush", referenced from: _main in main.o "_NSStringFromClass", referenced from: _main in main.o "_NSLog", referenced from: -[AppDelegate saveContext] in AppDelegate.o -[AppDelegate persistentStoreCoordinator] in AppDelegate.o "_OBJC_CLASS_$_NSManagedObjectModel", referenced from: objc-class-ref in AppDelegate.o "_OBJC_CLASS_$_NSURL", referenced from: objc-class-ref in MainViewController.o "_OBJC_METACLASS_$_NSObject", referenced from: _OBJC_METACLASS_$_AppDelegate in AppDelegate.o _OBJC_METACLASS_$_MainViewController in MainViewController.o _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o "_OBJC_CLASS_$_NSPersistentStoreCoordinator", referenced from: objc-class-ref in AppDelegate.o ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation) </code></pre>
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    1. COSee my answer. It works only if you have Apple-mac o linker error with lib file http://stackoverflow.com/questions/11312915/apple-mach-o-linker-error-using-core-data-classes-in-ocunit/17275174#17275174
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      1. USGajendra K Chauhan
 

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