我最近開始學習Swift,需要幫助。該程序運行良好之前,但我不知道我做了什麼,現在它不工作,按鈕不會出現,並在一個屏幕上崩潰。一個錯誤說:「由於未捕獲的異常'NSUnknownKeyExeption',原因:[setValue:forUndefinedKey:]終止應用程序:此類不是密鑰nextButton編碼兼容的關鍵值。 Ive得到你點擊進入到下一個屏幕按鈕,但我點擊它,它崩潰繼承人的代碼上HomeViewController,SecondScreenViewController和ThirdScreenViewController在Swift中更改屏幕視圖3
HomeViewController
@IBAction func notifiyButtonPressed(_ sender: AnyObject) {
print("Pressed")
self.performSegue(withIdentifier: "ViewSegue", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
print("View has loaded! ")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
SecondScreenViewController:。
@IBOutlet var textField: UITextField!
@IBAction func nextButtonPressed(_ sender: Any) {
self.performSegue(withIdentifier: "whotoclass", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
self.textField.delegate = self
print("View 2 Loaded")
// 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.
}
//Hide Keyboard when user touches outside keybaord
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
self.view.endEditing(true)
}
//Presses return key
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return(true)
}
ThirdScreenViewController:
import UIKit
類ThirdScreenViewController:UIViewController的{
@IBOutlet var joshClassButton: UIButton!
@IBAction func joshClassButton(_ sender: Any) {
self.performSegue(withIdentifier: "classtoperiod", sender: self)
}
override func viewDidLoad() {
super.viewDidLoad()
// 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.
}
此外,隸屬是我Main.storyboard的圖像。如果任何人都可以在這裏協助,那麼這將是一個巨大的幫助,至少在2小時內一直在解決問題。感謝大家!
http://i.imgur.com/QCuJojA.png
你不知何故取消設置類的故事板第二VC的,所以它試圖加載普通'UIViewController',這當然沒有名爲'nextButton'的屬性。或者,如果你沒有解除課程,那麼你必須從第二個VC中刪除'nextButton'插座。 – NRitH
您能否包括堆棧跟蹤的截圖(日誌輸出在異常之上)? 我的直覺是告訴你擺脫故事板並跑步;這是一個糟糕的工具,長期限制你。如果你開始使用它,請包括堆棧跟蹤,我們會看到我們可以做什麼。 – Ryan
嘿傢伙。非常感謝你的幫助。我自己動手修理。發現我刪除了它,但它仍在代碼中。再次感謝! –