在Swift中更改屏幕视图3

-2

我最近开始学习Swift，需要帮助。该程序运行良好之前，但我不知道我做了什么，现在它不工作，按钮不会出现，并在一个屏幕上崩溃。一个错误说：“由于未捕获的异常'NSUnknownKeyExeption'，原因：[setValue：forUndefinedKey：]终止应用程序：此类不是密钥nextButton编码兼容的关键值。 Ive得到你点击进入到下一个屏幕按钮，但我点击它，它崩溃继承人的代码上HomeViewController，SecondScreenViewController和ThirdScreenViewController在Swift中更改屏幕视图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

类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，隶属是我Main.storyboard的图像。如果任何人都可以在这里协助，那么这将是一个巨大的帮助，至少在2小时内一直在解决问题。感谢大家！

http://i.imgur.com/QCuJojA.png

来源

2017-05-28 Steve Left

你不知何故取消设置类的故事板第二VC的，所以它试图加载普通'UIViewController'，这当然没有名为'nextButton'的属性。或者，如果你没有解除课程，那么你必须从第二个VC中删除'nextButton'插座。 – NRitH

您能否包括堆栈跟踪的截图（日志输出在异常之上）？我的直觉是告诉你摆脱故事板并跑步;这是一个糟糕的工具，长期限制你。如果你开始使用它，请包括堆栈跟踪，我们会看到我们可以做什么。 – Ryan

嘿家伙。非常感谢你的帮助。我自己动手修理。发现我删除了它，但它仍在代码中。再次感谢！ –

尝试一下本作斯威夫特3

public func settingAction(_sender: UIButton) { 
    let settingStoryboard : UIStoryboard = UIStoryboard(name: "SettingViewController", bundle: nil) 
    let settingVC = settingStoryboard.instantiateViewController(withIdentifier: "SettingViewController") as! SettingViewController 
    self.present(settingVC, animated: true, completion: { 

    }) 
}

来源

2017-05-28 04:30:05 Giang

在Swift中更改屏幕视图3

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