uibutton을 눌렀을 때 핵심 데이터에 값을 저장하는 방법은 무엇입니까?

UIKit 가져 오기 CoreData 가져 오기

class ViewController : UIViewController {

@IBAction func btnGood(sender: AnyObject) {

    var appDel:AppDelegate = (UIApplication.sharedApplication().delegate as! AppDelegate)
    var context: NSManagedObjectContext = appDel.managedObjectContext

    var record = NSEntityDescription.insertNewObjectForEntityForName("Meals", inManagedObjectContext: context) as NSManagedObject
    record.setValue(1, forKey: "data")
    do {
        try context.save()
    } catch {
        print("error")
    }
    print(record)
    print("Object Saved")

}

오류-

2015-11-23 17:10:12.264 statsStoring[5355:669919] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unacceptable type of value for attribute: property = "data"; desired type = NSString; given type = __NSCFNumber; value = 1.'
*** First throw call stack:
(
    0   CoreFoundation                      0x0000000101a3be65 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x000000010377adeb objc_exception_throw + 48
    2   CoreData                            0x00000001015d6990 _PFManagedObject_coerceValueForKeyWithDescription + 2864
    3   CoreData                            0x00000001015ae801 _sharedIMPL_setvfk_core + 177
    4   statsStoring                        0x00000001014c83ec _TFC12statsStoring14ViewController7btnGoodfS0_FPSs9AnyObject_T_ + 684
    5   statsStoring                        0x00000001014c8786 _TToFC12statsStoring14ViewController7btnGoodfS0_FPSs9AnyObject_T_ + 54
    6   UIKit                               0x000000010225c8c8 -[UIApplication sendAction:to:from:forEvent:] + 92
    7   UIKit                               0x00000001023cb328 -[UIControl sendAction:to:forEvent:] + 67
    8   UIKit                               0x00000001023cb5f4 -[UIControl _sendActionsForEvents:withEvent:] + 311
    9   UIKit                               0x00000001023ca724 -[UIControl touchesEnded:withEvent:] + 601
    10  UIKit                               0x00000001022cbbcf -[UIWindow _sendTouchesForEvent:] + 835
    11  UIKit                               0x00000001022cc904 -[UIWindow sendEvent:] + 865
    12  UIKit                               0x000000010227b29a -[UIApplication sendEvent:] + 263
    13  UIKit                               0x00000001022554cb _UIApplicationHandleEventQueue + 6844
    14  CoreFoundation                      0x0000000101967a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    15  CoreFoundation                      0x000000010195d95c __CFRunLoopDoSources0 + 556
    16  CoreFoundation                      0x000000010195ce13 __CFRunLoopRun + 867
    17  CoreFoundation                      0x000000010195c828 CFRunLoopRunSpecific + 488
    18  GraphicsServices                    0x00000001060b5ad2 GSEventRunModal + 161
    19  UIKit                               0x000000010225ad44 UIApplicationMain + 171
    20  statsStoring                        0x00000001014ca89d main + 109
    21  libdyld.dylib                       0x000000010429492d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb) 

사용자가 btngood 버튼을 누르면 '1 (true)'값이 'data'속성에 저장되어야합니다! 이것을 위해 나는 1을 시도했지만 그것은 나에게 오류를주고 그것을하는 올바른 방법이 아니라는 것을 알고 있습니다.