Question

我有一些UIButtons，当我加载ViewCOntroller时，应用程序崩溃，当我删除UI按钮时，应用程序正常工作并加载

这就是发生的事情

2016-01-17 16:27:51.151 HHKNBK[36147:32655609] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<HHKNBK.ViewController 0x7fed73052380> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key one.'

*** First throw call stack:
(
    0   CoreFoundation                      0x000000010f757e65 __exceptionPreprocess + 165
    1   libobjc.A.dylib                     0x00000001116bfdeb objc_exception_throw + 48
    2   CoreFoundation                      0x000000010f757aa9 -[NSException raise] + 9
    3   Foundation                          0x000000010fd489bb -[NSObject(NSKeyValueCoding) setValue:forKey:] + 288
    4   UIKit                               0x000000011032b320 -[UIViewController setValue:forKey:] + 88
    5   UIKit                               0x0000000110559f41 -[UIRuntimeOutletConnection connect] + 109
    6   CoreFoundation                      0x000000010f6984a0 -[NSArray makeObjectsPerformSelector:] + 224
    7   UIKit                               0x0000000110558924 -[UINib instantiateWithOwner:options:] + 1864
    8   UIKit                               0x0000000110331eea -[UIViewController _loadViewFromNibNamed:bundle:] + 381
    9   UIKit                               0x0000000110332816 -[UIViewController loadView] + 178
    10  UIKit                               0x0000000110332b74 -[UIViewController loadViewIfRequired] + 138
    11  UIKit                               0x00000001103332e7 -[UIViewController view] + 27
    12  UIKit                               0x00000001103858b0 -[UINavigationController preferredContentSize] + 194
    13  UIKit                               0x000000011030a0aa -[UIPresentationController preferredContentSizeDidChangeForChildContentContainer:] + 59
    14  UIKit                               0x0000000110306438 __56-[UIPresentationController runTransitionForCurrentState]_block_invoke + 95
    15  UIKit                               0x00000001101a84a2 _runAfterCACommitDeferredBlocks + 317
    16  UIKit                               0x00000001101bbc01 _cleanUpAfterCAFlushAndRunDeferredBlocks + 95
    17  UIKit                               0x00000001101c7af3 _afterCACommitHandler + 90
    18  CoreFoundation                      0x000000010f683367 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
    19  CoreFoundation                      0x000000010f6832d7 __CFRunLoopDoObservers + 391
    20  CoreFoundation                      0x000000010f678f2b __CFRunLoopRun + 1147
    21  CoreFoundation                      0x000000010f678828 CFRunLoopRunSpecific + 488
    22  GraphicsServices                    0x000000011486cad2 GSEventRunModal + 161
    23  UIKit                               0x000000011019c610 UIApplicationMain + 171
    24  HHKNBK                              0x000000010f10677d main + 109
    25  libdyld.dylib                       0x00000001121d192d start + 1
    26  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

这是代码

import UIKit

class ViewController: UIViewController {


    @IBOutlet var live: mainbutton!

    @IBOutlet var dt: mainbutton!

    @IBOutlet var ms: mainbutton!
    @IBOutlet var `as1`: mainbutton!
    @IBOutlet var read: mainbutton!
    @IBOutlet var pg: mainbutton!


    override func viewDidLoad() {
        super.viewDidLoad()


        self.view.backgroundColor = color125

        live.setTitle("Live", forState: UIControlState.Normal)
        dt.setTitle("Dhamma Talk", forState: UIControlState.Normal)
        ms.setTitle("Mediations Stream", forState: UIControlState.Normal)
        as1.setTitle("Adavanced And Special Streams", forState: UIControlState.Normal)
        read.setTitle("Read", forState: UIControlState.Normal)
        pg.setTitle("Program Guide", forState: UIControlState.Normal)


        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

App Delegate

import UIKit

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func grabStoryboard() -> UIStoryboard {
        var storyboard = UIStoryboard()
        let height = UIScreen.mainScreen().bounds.size.height

        if height == 480 {
            storyboard = UIStoryboard(name: "main3.5", bundle: nil)
        } else if height == 568 {
            storyboard = UIStoryboard(name: "main4", bundle: nil)
        } else if height == 667 {
            storyboard = UIStoryboard(name: "main6", bundle: nil)
        } else if height == 736 {
            storyboard = UIStoryboard(name: "main6plus", bundle: nil)
        } else {
            storyboard = UIStoryboard(name: "Main", bundle: nil)
        }

        return storyboard
    }

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.


    UINavigationBar.appearance().barTintColor = color125


        let storyboard: UIStoryboard = self.grabStoryboard()

        self.window?.rootViewController =
            storyboard.instantiateInitialViewController()! as UIViewController
        self.window?.makeKeyAndVisible()
        return true
    }

海关类别代码

override func awakeFromNib() {
        self.backgroundColor = color125
        self.layer.cornerRadius = 5
        self.setTitleColor(UIColor.blackColor(), forState: .Normal)
}

Answer 1

错误消息表明它们是名称“one”的插座的缺失链接（“对于密钥1”）。

2016-01-17 16：27：51.151 HHKNBK [36147：32655609] ***终止app到期未捕获的异常'NSUnknownKeyException'，原因： '[setValue：forUndefinedKey：]：这个类不是关键值的密钥值编码。'

发生的事情是最初创建了“one”的插座（按住Ctrl键拖放），但代码中的变量名称已更改。

作为一个例子，我创建了一个名为“ one ”的商店：

@IBOutlet weak var one: UIButton! // Initially working

然后将一个重命名为已更改

@IBOutlet weak var changed: UIButton! // <- Now broken outlet

现在我收到相同的错误消息：

2016-01-17 18:56:14.059 InvalidOutlet [10158：5713712] ***终止应用程序由于未捕获的异常'NSUnknownKeyException'，原因： “[ setValue：forUndefinedKey：]：此类不是键值符合编码的关键字。'

要解决此问题，请通过

删除无效的插座引用

打开故事板，定义了插座。
选择定义插座的组件。
打开“显示连接检查器”（右上角带箭头的圆圈）
删除屏幕截图中显示的无效插座

Answer 2

我认为这条线是罪魁祸首 -

@IBOutlet var `as1`: mainbutton!

删除这些引号

@IBOutlet var as1: mainbutton!

UIButton导致崩溃

2 个答案: