Question

每次我想加载特定的UIViewController

时都会出现此错误

2016-04-09 20：48：02.183 myApp [91268：15399441] *终止app到期   未捕获的异常'NSUnknownKeyException'，原因：   '[setValue：forUndefinedKey：]：this   class不是键值registerAction的键值编码兼容。   * 第一次抛出调用堆栈：（0 CoreFoundation 0x000000010aaa6d85 exceptionPreprocess + 165 1 libobjc.A.dylib
  0x000000010c84adeb objc_exception_throw + 48 2 CoreFoundation
  0x000000010aaa69c9 - [NSException raise] + 9 3基础
  0x000000010ae7819b - [NSObject（NSKeyValueCoding）setValue：forKey：] +   288 4 UIKit 0x000000010b461d0c    - [UIViewController setValue：forKey：] + 88 5 UIKit 0x000000010b6987fb - [UIRuntimeOutletConnection connect] + 109 6
  CoreFoundation 0x000000010a9e0890 - [NSArray   makeObjectsPerformSelector：] + 224 7 UIKit
  0x000000010b6971de - [UINib instantiateWithOwner：options：] + 1864 8
  UIKit 0x000000010b4688d6    - [UIViewController _loadViewFromNibNamed：bundle：] + 381 9 UIKit 0x000000010b469202 - [UIViewController loadView] + 178 10 UIKit
  0x000000010b469560 - [UIViewController loadViewIfRequired] + 138 11   UIKit 0x000000010b469cd3    - [UIViewController视图] + 27 12 UIKit 0x000000010b33ffb4 - [UIWindow addRootViewControllerViewIfPossible] +   61 13 UIKit 0x000000010b34069d    - [UIWindow _setHidden：强制：] + 282 14 UIKit 0x000000010b352180 - [UIWindow makeKeyAndVisible] + 42 15 UIKit
  0x000000010b2c6ed9 - [UIApplication   _callInitializationDelegatesForMainScene：transitionContext：] + 4131 16 UIKit 0x000000010b2cd568    - [UIApplication _runWithMainScene：transitionContext：completion：] + 1769 17 UIKit 0x000000010b2ca714    - [UIApplication workspaceDidEndTransaction：] + 188 18 FrontBoardServices 0x000000010e6db8c8   __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK + 24 19 FrontBoardServices 0x000000010e6db741    - [FBSSerialQueue _performNext] + 178 20 FrontBoardServices 0x000000010e6dbaca - [FBSSerialQueue _performNextFromRunLoopSource] +   45 21 CoreFoundation 0x000000010a9cc301    CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17 22 CoreFoundation 0x000000010a9c222c   __CFRunLoopDoSources0 + 556 23 CoreFoundation 0x000000010a9c16e3 __CFRunLoopRun + 867 24 CoreFoundation
  0x000000010a9c10f8 CFRunLoopRunSpecific + 488 25 UIKit
  0x000000010b2c9f21 - [UIApplication _run] + 402 26 UIKit
  0x000000010b2cef09 UIApplicationMain + 171 27 myApp
  0x000000010a70dfb2 main + 114 28 libdyld.dylib
  0x000000010dc6292d start + 1 29 ???   0x0000000000000001 0x0 + 1）libc ++ abi.dylib：终止于   NSException（lldb）
类型的未捕获异常

UIViewController里面的内容==＆gt;

import UIKit

class signUpPage: UIViewController {

@IBOutlet var emailTextField: UITextField!

@IBOutlet var passTextField: UITextField!
override func viewDidLoad() {
    self.viewDidLoad()
}
override func didReceiveMemoryWarning() {
    self.didReceiveMemoryWarning()
}

@IBAction func registerAction(sender: AnyObject) {
    let email = self.emailTextField.text
    let pass = self.passTextField.text
    if (email != "" && pass != ""){

        firebase_ref.createUser(email, password: pass, withValueCompletionBlock: { (error, results) in
            if (error == nil ){
                firebase_ref.authUser(email, password: pass, withCompletionBlock: { (error, authData) in
                    if (error == nil ){
                        NSUserDefaults.standardUserDefaults().setValue(authData.uid, forKey: "uid")
                        print("Account created Successfully ")
                        self.dismissViewControllerAnimated(true, completion: nil)
                    }else{
                        print(error.localizedDescription)
                    }
                })
            }else{
                print(error.localizedDescription)
            }
        })


    }else{
        let alert = UIAlertController(title: "Error", message: "Enter an email and password", preferredStyle: .Alert)
        let okAction = UIAlertAction(title: "ok", style: .Default, handler: nil)
        alert.addAction(okAction)
        self.presentViewController(alert, animated: true, completion: nil)
    }
}

@IBAction func cancleAction(sender: AnyObject) {

    self.dismissViewControllerAnimated(true, completion: nil )
}

} 在此先感谢您的帮助:)

Answer 1

看起来您没有将IBAction registerAction连接到您的xib。

转到你的xib获取这个UIViewController，按住Control键并从按钮拖动到File's Owner，你会看到一个菜单弹出一个你的IBActions列表。可以从列表中选择正确的连接按钮。

此外，如果您可能希望将发件人定义为类型而不是AnyObject。

或者您没有连接到xib的正确类

单击文件所有者，确保在Identity Inspector中使用正确的类：

Answer 2

import UIKit

class signUpPage: UIViewController {

@IBOutlet var emailTextField: UITextField!

@IBOutlet var passTextField: UITextField!
override func viewDidLoad() {
self.viewDidLoad()
}
override func didReceiveMemoryWarning() {
self.didReceiveMemoryWarning()
}

@IBAction func registerAction(sender: AnyObject) {
let email = self.emailTextField.text
let pass = self.passTextField.text
if (email != "" && pass != ""){

    firebase_ref.createUser(email, password: pass, withValueCompletionBlock: { (error, results) in
        if (error == nil ){
            firebase_ref.authUser(email, password: pass, withCompletionBlock: { (error, authData) in
                if (error == nil ){
                    if (authData.uid != nil) {
    NSUserDefaults.standardUserDefaults().setValue(authData.uid, forKey: "uid")
}
                    print("Account created Successfully ")
                    self.dismissViewControllerAnimated(true, completion: nil)
                }else{
                    print(error.localizedDescription)
                }
            })
        }else{
            print(error.localizedDescription)
        }
    })


}else{
    let alert = UIAlertController(title: "Error", message: "Enter an email and password", preferredStyle: .Alert)
    let okAction = UIAlertAction(title: "ok", style: .Default, handler: nil)
    alert.addAction(okAction)
    self.presentViewController(alert, animated: true, completion: nil)
}
}

 @IBAction func cancleAction(sender: AnyObject) {

self.dismissViewControllerAnimated(true, completion: nil )
}

由于NSUnknownKeyException导致的应用终止错误

2 个答案: