NSUnknownKeyException при запуске приложения

Question

Программа запускается и затем выдается ошибка, и это приводит меня к appDelegate.swift файла --class AppDelegate: UIResponder, UIApplicationDelegate {- резьба 1: сигнал sigabort

Вот код :

import UIKit 

class ViewController: UIViewController { 

    let filemgr = NSFileManager.defaultManager() 
    let dirPaths = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true) 

    @IBOutlet weak var address: UITextField! 
    @IBOutlet weak var street: UITextField! 
    @IBOutlet weak var city: UITextField! 
    @IBOutlet weak var state: UITextField! 
    @IBOutlet weak var zip: UITextField! 

    @IBOutlet weak var status: UILabel! 

    var database = NSString() // <-- CRASHING HERE 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     let docsDir = dirPaths[0] 
     let databasePath = docsDir.stringByAppendingString("/contacts.db") // This seems to work 

     if !filemgr.fileExistsAtPath(databasePath as String) { 
      let contactDB = FMDatabase(path: databasePath as String) 

      if contactDB == nil { 
       print("Error DB") 
      } 
      if contactDB.open() { 
       let sql = "CREATE TABLE IF NOT EXISTS Houses (ID INTEGER PRIMARY KEY AUTOINCREMENT, Address TEXT, Street TEXT, City TEXT, State TEXT, Zip TEXT)" 
       if !contactDB.executeStatements(sql) { 
        print("Error DB") 
       } 
       else { 
        print("Error DB") 
       } 
      } 
     } 
    } 
    @IBAction func saveData(sender: AnyObject) { 
     let docsDir = dirPaths[0] 
     let databasePath = docsDir.stringByAppendingString("/contacts.db") // This seems to work 

     if !filemgr.fileExistsAtPath(databasePath as String) { 
      let contactDB = FMDatabase(path: databasePath as String) 
      if contactDB.open() { 
       let sql = "insert into Houses (Address, State, City, State, Zip) values ('\(address),\(street),\(city),\(state),\(zip))" 

       let result = contactDB.executeUpdate(sql, withArgumentsInArray: nil) 

       if !result { 
        status.text = "Failed to add house" 
        print("DB Error") 
       } 
       else { 
        status.text = "Added House" 
        address.text = "" 
        street.text = "" 
        city.text = "" 
        state.text = "" 
        zip.text = "" 
       } 
      } 
      else { 
       print("DB Error") 
      } 
     } 
    } 
    @IBAction func findContact(sender: AnyObject) { 
     let docsDir = dirPaths[0] 
     let databasePath = docsDir.stringByAppendingString("/contacts.db") 

     if !filemgr.fileExistsAtPath(databasePath as String) { 
      let contactDB = FMDatabase(path: databasePath as String) 
      if contactDB.open() { 
       let sql = "SELECT address, street, state, state, zip WHERE ID = 1" // Change this later 
       let results:FMResultSet? = contactDB.executeQuery(sql,withArgumentsInArray: nil) 

       if results?.next() == true { 
        address.text = results?.stringForColumn("Address") 
        street.text = results?.stringForColumn("Street") 
        city.text = results?.stringForColumn("City") 
        state.text = results?.stringForColumn("State") 
        zip.text = results?.stringForColumn("Zip") 
       } 
       else { 
        status.text = "Record not found" 
        address.text = "" 
        street.text = "" 
        city.text = "" 
        state.text = "" 
        zip.text = "" 
       } 
       contactDB.close() 
      } 
      else { 
       print("DBError") 
      } 
     } 
    } 
    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 
} 

Вот ошибки:

 
2015-11-10 00:34:33.385 SQLiteDatabaseExample[3656:218507] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key name.' 
*** First throw call stack: 
(
    0 CoreFoundation      0x0000000106aa8f45 __exceptionPreprocess + 165 
    1 libobjc.A.dylib      0x0000000106522deb objc_exception_throw + 48 
    2 CoreFoundation      0x0000000106aa8b89 -[NSException raise] + 9 
    3 Foundation       0x000000010488fa6b -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288 
    4 UIKit        0x0000000104e6e04c -[UIViewController setValue:forKey:] + 88 
    5 UIKit        0x000000010509ba71 -[UIRuntimeOutletConnection connect] + 109 
    6 CoreFoundation      0x00000001069e9a80 -[NSArray makeObjectsPerformSelector:] + 224 
    7 UIKit        0x000000010509a454 -[UINib instantiateWithOwner:options:] + 1864 
    8 UIKit        0x0000000104e74c16 -[UIViewController _loadViewFromNibNamed:bundle:] + 381 
    9 UIKit        0x0000000104e75542 -[UIViewController loadView] + 178 
    10 UIKit        0x0000000104e758a0 -[UIViewController loadViewIfRequired] + 138 
    11 UIKit        0x0000000104e76013 -[UIViewController view] + 27 
    12 UIKit        0x0000000104d4f51c -[UIWindow addRootViewControllerViewIfPossible] + 61 
    13 UIKit        0x0000000104d4fc05 -[UIWindow _setHidden:forced:] + 282 
    14 UIKit        0x0000000104d614a5 -[UIWindow makeKeyAndVisible] + 42 
    15 UIKit        0x0000000104cdb396 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4131 
    16 UIKit        0x0000000104ce19c3 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1750 
    17 UIKit        0x0000000104cdeba3 -[UIApplication workspaceDidEndTransaction:] + 188 
    18 FrontBoardServices     0x0000000108776784 -[FBSSerialQueue _performNext] + 192 
    19 FrontBoardServices     0x0000000108776af2 -[FBSSerialQueue _performNextFromRunLoopSource] + 45 
    20 CoreFoundation      0x00000001069d5011 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 
    21 CoreFoundation      0x00000001069caf3c __CFRunLoopDoSources0 + 556 
    22 CoreFoundation      0x00000001069ca3f3 __CFRunLoopRun + 867 
    23 CoreFoundation      0x00000001069c9e08 CFRunLoopRunSpecific + 488 
    24 UIKit        0x0000000104cde4f5 -[UIApplication _run] + 402 
    25 UIKit        0x0000000104ce330d UIApplicationMain + 171 
    26 SQLiteDatabaseExample    0x00000001047a05ad main + 109 
    27 libdyld.dylib      0x000000010824f92d start + 1 
    28 ???         0x0000000000000001 0x0 + 1 
) 
libc++abi.dylib: terminating with uncaught exception of type NSException 
(lldb) 

Answer 1

IBOutlets Проверить подключения ViewController и удалить любой нежелательный connection.It может произойти когда вы удаляете код выхода в своем классе.