App crashes when i try to run this page - ios

Question

My app builds and runs successfully and the other pages do not have any issues. This page builds successfully, however, when I attempt to go to the page the app will crash. I am unsure of how to fix this issue.
import UIKit
class ViewController: UIViewController
{
#IBOutlet weak var txtView: UITextView!
func loadData (){
var txtView: NSMutableArray = NSMutableArray ()
txtView.removeAllObjects()
var query = PFQuery(className:"NewsPages")
query.getObjectInBackgroundWithId("KerL5Xf0Bx")
{
(NewsPages: PFObject!, error: NSError!) -> Void in
if error == nil
{
let content = NewsPages["content"] as String
self.txtView.text = String()
}
else
{
NSLog("%#", error)
}
}
}
}
My Error Code:
2014-12-21 20:00:05.679 App[1707:84302] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<App.ViewController 0x7fab1a4aabf0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key GameScore.'
*** First throw call stack:
(
0 CoreFoundation 0x000000010b649f35 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010d18dbb7 objc_exception_throw + 45
2 CoreFoundation 0x000000010b649b79 -[NSException raise] + 9
3 Foundation 0x000000010ba617b3 -[NSObject(NSKeyValueCoding) setValue:forKey:] + 259
4 CoreFoundation 0x000000010b593e80 -[NSArray makeObjectsPerformSelector:] + 224
5 UIKit 0x000000010c19ac7d -[UINib instantiateWithOwner:options:] + 1506
6 UIKit 0x000000010bff9f98 -[UIViewController _loadViewFromNibNamed:bundle:] + 242
7 UIKit 0x000000010bffa588 -[UIViewController loadView] + 109
8 UIKit 0x000000010bffa7f9 -[UIViewController loadViewIfRequired] + 75
9 UIKit 0x000000010bffac8e -[UIViewController view] + 27
10 UIKit 0x000000010c59c41e -[_UIFullscreenPresentationController _setPresentedViewController:] + 65
11 UIKit 0x000000010bfd6429 -[UIPresentationController initWithPresentedViewController:presentingViewController:] + 105
12 UIKit 0x000000010c006a41 -[UIViewController _presentViewController:withAnimationController:completion:] + 1746
13 UIKit 0x000000010c008d81 __62-[UIViewController presentViewController:animated:completion:]_block_invoke + 132
14 UIKit 0x000000010c008ca5 -[UIViewController presentViewController:animated:completion:] + 229
15 UIKit 0x000000010bed68be -[UIApplication sendAction:to:from:forEvent:] + 75
16 UIKit 0x000000010bfdd410 -[UIControl _sendActionsForEvents:withEvent:] + 467
17 UIKit 0x000000010bfdc7df -[UIControl touchesEnded:withEvent:] + 522
18 UIKit 0x000000010bf1c308 -[UIWindow _sendTouchesForEvent:] + 735
19 UIKit 0x000000010bf1cc33 -[UIWindow sendEvent:] + 683
20 UIKit 0x000000010bee99b1 -[UIApplication sendEvent:] + 246
21 UIKit 0x000000010bef6a7d _UIApplicationHandleEventFromQueueEvent + 17370
22 UIKit 0x000000010bed2103 _UIApplicationHandleEventQueue + 1961
23 CoreFoundation 0x000000010b57f551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
24 CoreFoundation 0x000000010b57541d __CFRunLoopDoSources0 + 269
25 CoreFoundation 0x000000010b574a54 __CFRunLoopRun + 868
26 CoreFoundation 0x000000010b574486 CFRunLoopRunSpecific + 470
27 GraphicsServices 0x000000010e6e09f0 GSEventRunModal + 161
28 UIKit 0x000000010bed5420 UIApplicationMain + 1282
29 Mars App 0x000000010a21d98e top_level_code + 78
30 Mars App 0x000000010a21da6a main + 42
31 libdyld.dylib 0x000000010e1f0145 start + 1
32 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

Answer 1

Open your corresponding xib file check all UI outlet connections, there you can see warning in some connection . delete that.

Answer 2

This error is always your xib file bind a error or not exists method ,so when you load view controllers fail.Check your xib file