Swift 3 | Xcode 8 datePicker更新UItextField

问题描述：

此代码允许您使用datePicker更新textField Xcode 7，但是当我尝试在Xcode 8和Swift 3中实现它时，应用程序崩溃并在AppDelegate.swift文件中引发SIGABRT错误。我检查了所有的@IB，并且没有任何需要删除的杂项连接。任何指导将不胜感激。Swift 3 | Xcode 8 datePicker更新UItextField

import UIKit 

class ViewController: UIViewController, UITextFieldDelegate { 
    @IBOutlet var eventStartText: UITextField! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     eventStartText.delegate = self 

     // Do any additional setup after loading the view. 
    } 

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

    // MARK: TextField Delegate 
    func datePickerChanged(sender: UIDatePicker) { 
     let formatter = DateFormatter() 
     formatter.dateStyle = .full 
     eventStartText.text = formatter.string(from: sender.date) 

     print("Try this at home") 
    } 

    func textFieldDidBeginEditing(_ textField: UITextField) { 
     let datePicker = UIDatePicker() 
     textField.inputView = datePicker 
     datePicker.addTarget(self, action: (Selector(("datePickerChanged:"))), for: .valueChanged) 

     print("This Worked") 
    } 

    func textFieldShouldReturn(_ textField: UITextField) -> Bool { 
     eventStartText.resignFirstResponder() 
     return true 
    } 

    // MARK: Helper Methods 
    func closekeyboard() { 
     self.view.endEditing(true) 
    } 

    // MARK: Touch Events 
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 
     closekeyboard() 
    } 

    /* 
    // MARK: - Navigation 

    // In a storyboard-based application, you will often want to do a little preparation before navigation 
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) { 
    // Get the new view controller using segue.destinationViewController. 
    // Pass the selected object to the new view controller. 
    } 
    */ 
}

请参阅http://www.raywenderlich.com/10209/my-app-crashed-now-what-part-1以了解如何调试崩溃。如果您需要帮助，请使用更多关于崩溃的相关详细信息更新您的问题（完整的错误消息并指出实际导致崩溃的行）。 – rmaddy

答

的问题是与selector语法，从斯威夫特3，您需要指定的第一个参数名里的selector，所以更改selector语法这样。

datePicker.addTarget(self, action: #selector(datePickerChanged(sender:)), for: .valueChanged)

你是摇滚明星！非常感谢。这个伎俩。 –

欢迎伴侣:) –

Swift 3 | Xcode 8 datePicker更新UItextField

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