5年前我一直在使用objective C，现在开始在Swift中工作。我面临着这种不正常的行为，谷歌了很多，但仍然没有得到解决方案，我在这里发帖，这样可能会发生在其他人身上，并可能帮助我解决这个问题！
场景是：我不是用故事板代替xibs。在AppDelegate中(roorviewcontroller是navigationcontroller)->主视图控制器加载成功->第二视图控制器也从主视图控制器成功加载，但从第二视图：我无法按下/弹出(点击按钮引发下降异常。你可以在你的端部测试这种情况，这不像我在更改ibaction或iboutlet等的文本。
在AppDelegate中：
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
window = UIWindow.init(frame: UIScreen.mainScreen().bounds)
window?.backgroundColor = UIColor.whiteColor()
let mainViewController = MainViewController()
let navController = UINavigationController(rootViewController: mainViewController)
window!.rootViewController = navController
window!.makeKeyAndVisible()
In-ViewControllers:
@IBAction func nextScreen()
{
let loginViewController = UIViewController(nibName: "DViewController", bundle: nil)
navigationController?.pushViewController(loginViewController, animated: true, completion: nil)
}
堆栈跟踪：
-[UIViewController getTaf]: unrecognized selector sent to instance 0x7d961f10
2017-01-07 20:15:00.125 January7[5083:187391] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController getTaf]: unrecognized selector sent to instance 0x7d961f10'
*** First throw call stack:
(
0 CoreFoundation 0x002c2494 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x01fd9e02 objc_exception_throw + 50
2 CoreFoundation 0x002cc253 -[NSObject(NSObject) doesNotRecognizeSelector:] + 275
3 CoreFoundation 0x0020189d ___forwarding___ + 1037
4 CoreFoundation 0x0020146e _CF_forwarding_prep_0 + 14
5 libobjc.A.dylib 0x01fee0b5 -[NSObject performSelector:withObject:withObject:] + 84
6 UIKit 0x00ab4e38 -[UIApplication sendAction:to:from:forEvent:] + 118
7 UIKit 0x00ab4db7 -[UIApplication sendAction:toTarget:fromSender:forEvent:] + 64
8 UIKit 0x00c58f3b -[UIControl sendAction:to:forEvent:] + 79
9 UIKit 0x00c592d4 -[UIControl _sendActionsForEvents:withEvent:] + 433
10 UIKit 0x00c582c1 -[UIControl touchesEnded:withEvent:] + 714
11 UIKit 0x00b3552e -[UIWindow _sendTouchesForEvent:] + 1095
12 UIKit 0x00b365cc -[UIWindow sendEvent:] + 1159
13 UIKit 0x00ad7be8 -[UIApplication sendEvent:] + 266
14 UIKit 0x00aac769 _UIApplicationHandleEventQueue + 7795
15 CoreFoundation 0x001d4e5f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
16 CoreFoundation 0x001caaeb __CFRunLoopDoSources0 + 523
17 CoreFoundation 0x001c9f08 __CFRunLoopRun + 1032
18 CoreFoundation 0x001c9846 CFRunLoopRunSpecific + 470
19 CoreFoundation 0x001c965b CFRunLoopRunInMode + 123
20 GraphicsServices 0x047d9664 GSEventRunModal + 192
21 GraphicsServices 0x047d94a1 GSEventRun + 104
22 UIKit 0x00ab2eb9 UIApplicationMain + 160
23 January7 0x000cf781 main + 145
24 libdyld.dylib 0x029f7a25 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
我们已经解决了这个问题，它可能会帮助一些人节省时间，它现在正在工作"通过用DViewController取代UIViewController！