首先，我为这个可能有点简单/菜鸟的问题道歉。但是，我已经尝试调试此错误已有一段时间了。不幸的是，我最近开始在 Xcode 中工作并使用 Swift。
我一直在学习 Udemy 的在线课程教程。但是，插入代码后，我不断收到此错误：
Thread1: Signal SIGABRT
不知道可能是什么。我一直在看谷歌https://teamtreehouse.com/community/error-message-thread-1-signal-sigabrt-in-class-appdelegate
但这并没有解决我的问题:(
此外，很难理解到底发生了什么，所以我无法通过谷歌找到一个好的解决方案。也许你可以帮我一下。
class ViewController: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
@IBOutlet weak var statePicker: UIPickerView!
@IBOutlet weak var statePickerBtn: UIButton!
let states = ["Alaska","Arkansas","Alabama","California","New York"]
override func viewDidLoad() {
super.viewDidLoad()
self.statePicker.dataSource = self
statePicker.delegate = self
// 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.
}
@IBAction func stateBtnPressed(_ sender: AnyObject) {
statePickerBtn.isHidden = false
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return states.count
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return states[row]
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
statePickerBtn.setTitle(states[row], for: UIControlState.application)
statePicker.isHidden = true
}
我想做什么：我有一个隐藏的选择器，当用户按下按钮时，我希望它显示选择器。用户单击事件后，他们将看到带有数组的选择器。好吧，你知道我的意思。但是，当我构建它时，模拟器保持白色并且 Xcode 提示我 AppDelegate.Swift 出现此特定错误。
特纳克斯
按运行后打印错误屏幕。+输出，对不起prnt scrn :)
控制台输出：
2017-03-01 18:03:39.717795 myPillsNoob[969:17168] subsystem: com.apple.UIKit, category: HIDEventFiltered, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 1, privacy_setting: 2, enable_private_data: 0
2017-03-01 18:03:39.725996 myPillsNoob[969:17168] subsystem: com.apple.UIKit, category: HIDEventIncoming, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 1, privacy_setting: 2, enable_private_data: 0
2017-03-01 18:03:39.738908 myPillsNoob[969:17165] subsystem: com.apple.BaseBoard, category: MachPort, enable_level: 1, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 0, privacy_setting: 0, enable_private_data: 0
2017-03-01 18:03:39.760737 myPillsNoob[969:17069] subsystem: com.apple.UIKit, category: StatusBar, enable_level: 0, persist_level: 0, default_ttl: 0, info_ttl: 0, debug_ttl: 0, generate_symptoms: 0, enable_oversize: 1, privacy_setting: 2, enable_private_data: 0
2017-03-01 18:03:39.849 myPillsNoob[969:17069] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<myPillsNoob.ViewController 0x7fa24ce09160> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key stateButtonPressed.'
*** First throw call stack:
(
0 CoreFoundation 0x00000001132e234b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000011038f21e objc_exception_throw + 48
2 CoreFoundation 0x00000001132e2299 -[NSException raise] + 9
3 Foundation 0x000000010fe9f2ff -[NSObject(NSKeyValueCoding) setValue:forKey:] + 291
4 UIKit 0x00000001109f88c3 -[UIViewController setValue:forKey:] + 88
5 UIKit 0x0000000110c6cbe6 -[UIRuntimeOutletConnection connect] + 109
6 CoreFoundation 0x0000000113287590 -[NSArray makeObjectsPerformSelector:] + 256
7 UIKit 0x0000000110c6b56a -[UINib instantiateWithOwner:options:] + 1867
8 UIKit 0x00000001109feff5 -[UIViewController _loadViewFromNibNamed:bundle:] + 386
9 UIKit 0x00000001109ff917 -[UIViewController loadView] + 177
10 UIKit 0x00000001109ffc4c -[UIViewController loadViewIfRequired] + 201
11 UIKit 0x0000000110a004a0 -[UIViewController view] + 27
12 UIKit 0x00000001108ca045 -[UIWindow addRootViewControllerViewIfPossible] + 71
13 UIKit 0x00000001108ca796 -[UIWindow _setHidden:forced:] + 293
14 UIKit 0x00000001108de0a9 -[UIWindow makeKeyAndVisible] + 42
15 UIKit 0x0000000110857259 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4818
16 UIKit 0x000000011085d3b9 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1731
17 UIKit 0x000000011085a539 -[UIApplication workspaceDidEndTransaction:] + 188
18 FrontBoardServices 0x000000011477b76b __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
19 FrontBoardServices 0x000000011477b5e4 -[FBSSerialQueue _performNext] + 189
20 FrontBoardServices 0x000000011477b96d -[FBSSerialQueue _performNextFromRunLoopSource] + 45
21 CoreFoundation 0x0000000113287311 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
22 CoreFoundation 0x000000011326c59c __CFRunLoopDoSources0 + 556
23 CoreFoundation 0x000000011326ba86 __CFRunLoopRun + 918
24 CoreFoundation 0x000000011326b494 CFRunLoopRunSpecific + 420
25 UIKit 0x0000000110858db6 -[UIApplication _run] + 434
26 UIKit 0x000000011085ef34 UIApplicationMain + 159
27 myPillsNoob 0x000000010fdb071f main + 111
28 libdyld.dylib 0x0000000113fe568d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
最重要的错误信息是：
此类不符合键 stateButtonPressed 的键值编码。
stateButtonPressed。这很可能是 Interface Builder 中的死连接。本文收集自互联网，转载请注明来源。
如有侵权，请联系[email protected] 删除。
我来说两句