一个页面上的多个UITextFields显示日期，但只有UITextFields显示器之一日期从两个DatePickers

问题描述：

我现在有2个UITextFields，一个需要返回日期和其他需要返回时间slected。一个页面上的多个UITextFields显示日期，但只有UITextFields显示器之一日期从两个DatePickers

我遇到的问题是，如果我点击第一个文本字段（即“出生日期：”），我选择的日期被返回（显然这正是我想要发生的）但是，如果我点击第二个文本字段（即“第一顿时间：”），第二个文本字段不会更新，但第一个文本字段是（这是我的第一个问题）。

我遇到的下一个问题是，当我点击我的第二个文本字段（即“第一顿饭的时间：”）时，日期显示在选择器上，而不是时间（我想显示时间）。

我认为这两个问题是相关的，但我无法弄清楚它是什么，我缺少的两个采摘区分彼此。

的计划是再有第三个文本框（即“最后一顿饭的时间”）也显示时间（到第二个文本字段显示不同），所以我想，一旦我能得到这两个问题目前我排序后，我可以将相同的解决方案应用于第三个文本字段。

正如你能想象（基于文本字段我有量），我砍倒代码只涉及到日期选取器位。

Picture of text fields from my storyboard

Picture of date picker (the same picker shows up for both text fields)

import UIKit 

class ProfileCreator: UIViewController, UIPickerViewDelegate, UITextFieldDelegate, UIPickerViewDataSource { 

var output: Int = 0 
var output2: Int = 0 

// -------------------------------------------------------------------------------------- // 

// DOB Selector From Text Field Start 1 // 

@IBOutlet weak var DOBSelectorTextField: UITextField! 

func textFieldDidBeginEditing(DOBtextField: UITextField) { 
    let DOBPicker = UIDatePicker() 
    DOBtextField.inputView = DOBPicker 
    DOBPicker.datePickerMode = UIDatePickerMode.Date 
    DOBPicker.addTarget(self, action: "DOBpickerchanged:", forControlEvents: .ValueChanged) 
} 

func textFieldShouldReturn(DOBtextField: UITextField) -> Bool { 
    DOBtextField.resignFirstResponder() 
    return true 

} 

func DOBpickerchanged(DOBsender: UIDatePicker) { 
    let DOBformatter = NSDateFormatter() 
    DOBformatter.dateFormat = "dd MMMM yyyy" 
    DOBSelectorTextField.text = DOBformatter.stringFromDate(DOBsender.date) 

} 

// DOB Selector From Text Field End 1 // 

// -------------------------------------------------------------------------------------- //  

// First Meal Time Text Field Start 1 // 

@IBOutlet weak var FirstMealTimeTextField: UITextField! 

@IBAction func FirstMealTimeTextField(FirstMealTimeSender: UITextField) { 

    let FirstMealTimePicker = UIDatePicker() 
    FirstMealTimeSender.inputView = FirstMealTimePicker 
    FirstMealTimePicker.datePickerMode = UIDatePickerMode.Time 
    FirstMealTimePicker.addTarget(self, action: "FirstMealTimeChanged:", forControlEvents: .ValueChanged) 

} 

func FirstMealTimeChanged(FirstMealTimesender: UIDatePicker) { 
    let FirstMealtimeFormatter = NSDateFormatter() 
    FirstMealtimeFormatter.dateFormat = "HH:mm" 
    FirstMealTimeTextField.text = FirstMealtimeFormatter.stringFromDate(FirstMealTimesender.date) 
} 

// First Meal Time Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

override func viewDidLoad() { 
    super.viewDidLoad() 

// -------------------------------------------------------------------------------------- // 

// DOB Selector From Text Field Start 2 // 

    DOBSelectorTextField.delegate = self 

// DOB Selector From Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// First Meal Time Text Field Start 2 // 

    FirstMealTimeTextField.delegate = self 

// First Meal Time Text Field End 2 // 

} 

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

下面是涉及到我的 “创建配置文件” 页我的全部代码。也许这将有助于理解我迄今为止所做的事情。我非常有信心在创建数据来自数组的数据采集器时，我正在努力的是在同一页面上执行多个日期选择器。

import UIKit 

class ProfileCreator: UIViewController, UIPickerViewDelegate, UITextFieldDelegate, UIPickerViewDataSource { 

var output: Int = 0 
var output2: Int = 0 

// -------------------------------------------------------------------------------------- // 

// DOB Selector From Text Field Start 1 // 

@IBOutlet weak var DOBSelectorTextField: UITextField! 

func textFieldDidBeginEditing(DOBtextField: UITextField) { 
    let DOBPicker = UIDatePicker() 
    DOBtextField.inputView = DOBPicker 
    DOBPicker.datePickerMode = UIDatePickerMode.Date 
    DOBPicker.addTarget(self, action: "DOBpickerchanged:", forControlEvents: .ValueChanged) 
} 

func textFieldShouldReturn(DOBtextField: UITextField) -> Bool { 
    DOBtextField.resignFirstResponder() 
    return true 

} 

func DOBpickerchanged(DOBsender: UIDatePicker) { 
    let DOBformatter = NSDateFormatter() 
    DOBformatter.dateFormat = "dd MMMM yyyy" 
    DOBSelectorTextField.text = DOBformatter.stringFromDate(DOBsender.date) 

} 

// DOB Selector From Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Gender Selector From Text Field Start 1 // 

@IBOutlet weak var GenderSelectorTextField: UITextField! 
var GenderSelectorData = ["Male", "Female"] 
var GenderSelectorPicker = UIPickerView() 

// Gender Selector From Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Height Whole Number Text Field Start 1 // 

@IBOutlet weak var HeightWholeNumberTextField: UITextField! 

// Height Whole Number Text Field Start 1 // 

// -------------------------------------------------------------------------------------- // 

// Height Whole Number Unit Selector Text Field Start 1 // 

@IBOutlet weak var HeightWholeNumberUnitSelectorTextField: UITextField! 
var HeightWholeNumberUnitSelectorData = ["m", "ft"] 
var HeightWholeNumberUnitSelectorPicker = UIPickerView() 

// Height Whole Number Unit Selector Text Field Start 1 // 

// -------------------------------------------------------------------------------------- // 

// Height Decimal Number Text Field Start 1 // 

@IBOutlet weak var HeightDecimalTextField: UITextField! 

// Height Decimal Number Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Height Decimal Number Unit Selector Text Field Start 1 // 

@IBOutlet weak var HeightDecimalNumberUnitSelectorTextField: UITextField! 
var HeightDecimalNumberUnitSelectorData = ["cm", "inch"] 
var HeightDecimalNumberUnitSelectorPicker = UIPickerView() 

// Height Decimal Number Unit Selector Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Current Weight Whole Number Text Field Start 1 // 

@IBOutlet weak var CurrentWeightWholeNumberTextField: UITextField! 

// Current Weight Whole Number Text Field Start 1 // 

// -------------------------------------------------------------------------------------- // 

// Current Weight Whole Number Unit Selector Text Field Start 1 // 

@IBOutlet weak var CurrentWeightWholeNumberUnitSelectorTextField: UITextField! 
var CurrentWeightWholeNumberUnitSelectorData = ["kg", "lb"] 
var CurrentWeightWholeNumberUnitSelectorPicker = UIPickerView() 

// Current Weight Whole Number Unit Selector Text Field Start 1 // 

// -------------------------------------------------------------------------------------- // 

// Current Weight Decimal Number Text Field Start 1 // 

@IBOutlet weak var CurrentWeightDecimalNumberTextField: UITextField! 

// Current Weight Decimal Number Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Current Weight Decimal Number Unit Selector Text Field Start 1 // 

@IBOutlet weak var CurrentWeightDecimalNumberUnitSelectorTextField: UITextField! 
var CurrentWeightDecimalNumberUnitSelectorData = ["g", "oz"] 
var CurrentWeightDecimalNumberUnitSelectorPicker = UIPickerView() 

// Current Weight Decimal Number Unit Selector Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Current Fitness Goal Selector Text Field Start 1 // 

@IBOutlet weak var CurrentFitnessGoalSelectorTextField: UITextField! 
var CurrentFitnessGoalSelectorData = ["Lose Fat", "Gain Muscle", "Maintain Physique"] 
var CurrentFitnessGoalSelectorPicker = UIPickerView() 

// Current Fitness Goal Selector Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Weekly Activity Level Text Field Start 1 // 

@IBOutlet weak var WeeklyActivityLevelTextField: UITextField! 
var WeeklyActivityLevelTextFieldData = ["I am sedentary (little or no exercise)", "I am lightly active (light exercise/sports 1-3 days per week)", "I am moderately active (moderate exercise/sports 3-5 days per week)", "I am very active (hard exercise/sports 6-7 days a week)", "I am extra active (very hard exercise/sports & physical job or 2 x training"] 
var WeeklyActivityLevelSelectorPicker = UIPickerView() 

// Weekly Activity Level Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// First Meal Time Text Field Start 1 // 

@IBOutlet weak var FirstMealTimeTextField: UITextField! 

@IBAction func FirstMealTimeTextField(FirstMealTimeSender: UITextField) { 

    let FirstMealTimePicker = UIDatePicker() 
    FirstMealTimeSender.inputView = FirstMealTimePicker 
    FirstMealTimePicker.datePickerMode = UIDatePickerMode.Time 
    FirstMealTimePicker.addTarget(self, action: "FirstMealTimeChanged:", forControlEvents: .ValueChanged) 

} 

func FirstMealTimeChanged(FirstMealTimesender: UIDatePicker) { 
    let FirstMealtimeFormatter = NSDateFormatter() 
    FirstMealtimeFormatter.dateFormat = "HH:mm" 
    FirstMealTimeTextField.text = FirstMealtimeFormatter.stringFromDate(FirstMealTimesender.date) 
} 

// First Meal Time Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Last Meal Time Text Field Start 1 // 



// Last Meal Time Text Field End 1 // 

// -------------------------------------------------------------------------------------- // 

// Close keyboard start // 

func closekeyboard() { 
    self.view.endEditing(true) 
} 

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) { 
    closekeyboard() 
} 

// Close keyboard end // 

// -------------------------------------------------------------------------------------- // 

override func viewDidLoad() { 
    super.viewDidLoad() 

// -------------------------------------------------------------------------------------- // 

// DOB Selector From Text Field Start 2 // 

    DOBSelectorTextField.delegate = self 

// DOB Selector From Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// Gender Selector From Text Field Start 2 // 

    GenderSelectorPicker.delegate = self 
    GenderSelectorPicker.dataSource = self 
    GenderSelectorTextField.inputView = GenderSelectorPicker 

// Gender Selector From Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// Height Whole Number Unit Selector Text Field Start 2 // 

    HeightWholeNumberUnitSelectorPicker.delegate = self 
    HeightWholeNumberUnitSelectorPicker.dataSource = self 
    HeightWholeNumberUnitSelectorTextField.inputView = HeightWholeNumberUnitSelectorPicker 

// Height Whole Number Unit Selector Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// Height Decimal Unit Selector Text Field Start 2 // 

    HeightDecimalNumberUnitSelectorPicker.delegate = self 
    HeightDecimalNumberUnitSelectorPicker.dataSource = self 
    HeightDecimalNumberUnitSelectorTextField.inputView = HeightDecimalNumberUnitSelectorPicker 

// Height Decimal Unit Selector Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// Current Weight Whole Number Unit Selector Text Field Start 2 // 

    CurrentWeightWholeNumberUnitSelectorPicker.delegate = self 
    CurrentWeightWholeNumberUnitSelectorPicker.dataSource = self 
    CurrentWeightWholeNumberUnitSelectorTextField.inputView = CurrentWeightWholeNumberUnitSelectorPicker 

// Current Weight Whole Number Unit Selector Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// Current Weight Decimal Unit Selector Text Field Start 2 // 

    CurrentWeightDecimalNumberUnitSelectorPicker.delegate = self 
    CurrentWeightDecimalNumberUnitSelectorPicker.dataSource = self 
    CurrentWeightDecimalNumberUnitSelectorTextField.inputView = CurrentWeightDecimalNumberUnitSelectorPicker 

// Current Weight Decimal Unit Selector Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// Current Fitness Goal Selector Text Field Start 2 // 

    CurrentFitnessGoalSelectorPicker.delegate = self 
    CurrentFitnessGoalSelectorPicker.dataSource = self 
    CurrentFitnessGoalSelectorTextField.inputView = CurrentFitnessGoalSelectorPicker 

// Current Fitness Goal Selector Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// Weekly Activity Level Selector Text Field Start 2 // 

    WeeklyActivityLevelSelectorPicker.delegate = self 
    WeeklyActivityLevelSelectorPicker.dataSource = self 
    WeeklyActivityLevelTextField.inputView = WeeklyActivityLevelSelectorPicker 

// Weekly Activity Level Selector Text Field End 2 // 

// -------------------------------------------------------------------------------------- // 

// First Meal Time Text Field Start 2 // 

    FirstMealTimeTextField.delegate = self 

// First Meal Time Text Field End 2 // 

} 

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

// -------------------------------------------------------------------------------------- // 

// Selectors Start 1 // 

func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int { 
    return 1 

} 

func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
    if pickerView == GenderSelectorPicker { 
     output = 1 
    } else if pickerView == HeightWholeNumberUnitSelectorPicker { 
     output = 2 
    } else if pickerView == HeightDecimalNumberUnitSelectorPicker { 
     output = 3 
    } else if pickerView == CurrentWeightWholeNumberUnitSelectorPicker { 
     output = 4 
    } else if pickerView == CurrentWeightDecimalNumberUnitSelectorPicker { 
     output = 5 
    } else if pickerView == CurrentFitnessGoalSelectorPicker { 
     output = 6 
    } else if pickerView == WeeklyActivityLevelSelectorPicker { 
     output = 7 
    } 

    switch output{ 
    case 1: 
     return GenderSelectorData.count 
    case 2: 
     return HeightWholeNumberUnitSelectorData.count 
    case 3: 
     return HeightDecimalNumberUnitSelectorData.count 
    case 4: 
     return CurrentWeightWholeNumberUnitSelectorData.count 
    case 5: 
     return CurrentWeightDecimalNumberUnitSelectorData.count 
    case 6: 
     return CurrentFitnessGoalSelectorData.count 
    case 7: 
     return WeeklyActivityLevelTextFieldData.count 
    default: 
     return 1 
    } 
} 

func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 
    if pickerView == GenderSelectorPicker { 
     output2 = 1 
    } else if pickerView == HeightWholeNumberUnitSelectorPicker { 
     output2 = 2 
    } else if pickerView == HeightDecimalNumberUnitSelectorPicker { 
     output2 = 3 
    } else if pickerView == CurrentWeightWholeNumberUnitSelectorPicker { 
     output2 = 4 
    } else if pickerView == CurrentWeightDecimalNumberUnitSelectorPicker { 
     output2 = 5 
    } else if pickerView == CurrentFitnessGoalSelectorPicker { 
     output2 = 6 
    } else if pickerView == WeeklyActivityLevelSelectorPicker { 
     output2 = 7 
    } 

    switch output2{ 
    case 1: 
     return GenderSelectorData[row] 
    case 2: 
     return HeightWholeNumberUnitSelectorData[row] 
    case 3: 
     return HeightDecimalNumberUnitSelectorData[row] 
    case 4: 
     return CurrentWeightWholeNumberUnitSelectorData[row] 
    case 5: 
     return CurrentWeightDecimalNumberUnitSelectorData[row] 
    case 6: 
     return CurrentFitnessGoalSelectorData[row] 
    case 7: 
     return WeeklyActivityLevelTextFieldData[row] 
    default: 
     return "" 
    } 
} 


func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 
    if pickerView == GenderSelectorPicker { 
     GenderSelectorTextField.text = GenderSelectorData[row] 
    } else if pickerView == HeightWholeNumberUnitSelectorPicker { 
     HeightWholeNumberUnitSelectorTextField.text = HeightWholeNumberUnitSelectorData[row] 
    } else if pickerView == HeightDecimalNumberUnitSelectorPicker { 
     HeightDecimalNumberUnitSelectorTextField.text = HeightDecimalNumberUnitSelectorData[row] 
    } else if pickerView == CurrentWeightWholeNumberUnitSelectorPicker { 
     CurrentWeightWholeNumberUnitSelectorTextField.text = CurrentWeightWholeNumberUnitSelectorData[row] 
    } else if pickerView == CurrentWeightDecimalNumberUnitSelectorPicker { 
     CurrentWeightDecimalNumberUnitSelectorTextField.text = CurrentWeightDecimalNumberUnitSelectorData[row] 
    } else if pickerView == CurrentFitnessGoalSelectorPicker { 
     CurrentFitnessGoalSelectorTextField.text = CurrentFitnessGoalSelectorData[row] 
    } else if pickerView == WeeklyActivityLevelSelectorPicker { 
     WeeklyActivityLevelTextField.text = WeeklyActivityLevelTextFieldData[row] 
    } 
} 
}

答

首先 - 创建一个文本框的委托回调文本框没有任何意义。我看到IBOutlet声明，所以我假设你正在使用故事板。如果是这样，那么你的场景中已经有了所有的textfield实例。刚刚从创建一个出水口的各个文本域控制器，这样就可以在必要时在代码中引用它们。

接下来，所有的文本字段将调用相同的委托或目标/行动方法。因此，在这些方法中，您需要找出哪个文本字段正在调用它并特别处理它。

func textFieldDidBeginEditing(textfield: UITextField) { 

    if textField == self.textField1 { 
     //do something to textfield1 
    } 
    else if textfield == textfield2 { 
     //do something to textfield2 
    } 
etc.... 
}

感谢您的答复。我应该首先让你知道，在编码方面我是一个完全新手（即我以前从来没有这样做过，现在我正在从stackoverflow和youtube学习，所以请原谅我缺乏理解。我正在使用故事板来创建这个应用程序，我假设当你说“从每个文本字段创建一个插座”时，我正在用@IBOutlets做什么？关于“如果”和“其他如果”的陈述，我不知道我应该把它们放在哪里。我之前用过它们的其他选手，但我正在努力研究如何安排时间选择。 – snoopios

答

我有同样的确切问题，并沿着你做的相同的确切路径。使用伯爵所给出的解决方案，我能够解决我的冲突。看看我的代码，你应该能够找出你的。我最好给你的建议是不要将字段看作是你所做的两个独立的代码段，而是使用IF语句的一段代码。

import UIKit 

class AddEventViewController: UIViewController, UITextFieldDelegate { 
    @IBOutlet var eventStartDateTimeText: UITextField! 
    @IBOutlet var eventEndDateTimeText: UITextField! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     eventStartDateTimeText.delegate = self 
     eventEndDateTimeText.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 
     formatter.timeStyle = .short 
     eventStartDateTimeText.text = formatter.string(from: sender.date) 
    } 

    func datePickerChangedEnd(sender: UIDatePicker) { 
     let formatter = DateFormatter() 

     formatter.dateStyle = .full 
     formatter.timeStyle = .short 
     eventEndDateTimeText.text = formatter.string(from: sender.date) 
    } 


    func textFieldDidBeginEditing(_ textField: UITextField) { 
     if textField == self.eventStartDateTimeText { 
      let datePicker = UIDatePicker() 
      textField.inputView = datePicker 

      datePicker.addTarget(self, action: #selector(datePickerChanged(sender:)), for: .valueChanged) 
     } else if textField == self.eventEndDateTimeText { 
      let datePicker = UIDatePicker() 
      textField.inputView = datePicker 

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

    func textFieldShouldReturn(_ textField: UITextField) -> Bool { 
     if textField == self.eventStartDateTimeText { 
      eventStartDateTimeText.resignFirstResponder() 
     } else if textField == self.eventEndDateTimeText { 
      eventEndDateTimeText.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. 
    } 
    */ 
}

一个页面上的多个UITextFields显示日期，但只有UITextFields显示器之一日期从两个DatePickers

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