Question

我目前有2个UITextFields，一个需要返回日期，另一个需要返回一个时间。

我遇到的问题是，如果我点击第一个文本字段（即＆＃34;出生日期：＆＃34;），我选择的日期将被返回（显然这是正是我想要发生的事情）然而，如果我点击第二个文本字段（即＆＃34;第一餐时间：＆＃34;），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＆＃34;第一餐的时间：＆＃34;）时，日期显示在选择器上，而不是时间（我希望有时间展示）。

我认为这两个问题是相关的，但我无法弄清楚我错过了什么，以区分两个拣选者。

计划是第三个文本字段（即＆＃34;最后一餐的时间＆＃34;）也显示一个时间（与第二个文本字段显示不同）所以我想我可以得到这两个问题我目前正在排序，我可以将相同的解决方案应用于第三个文本字段。

您可以想象（根据我已经获得的文本字段数量），我将代码仅减少到与日期选择器相关的位。

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.
}

这是我的整个代码，与我的＃34;创建个人资料＆＃34;页。也许它有助于理解我到目前为止所做的工作。我对创建数据来自数组的选择器非常有信心，我正在努力解决的问题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]
    }
}
}

Answer 1

首先 - 在textfield委托回调中创建文本字段没有任何意义。我看到IBOutlet声明，所以我假设你使用的是故事板。如果是这样，那么您已经拥有场景中的所有文本字段实例。只需在 EACH 文本字段中为控制器创建一个插座，以便在必要时可以在代码中引用它们。

接下来，所有文本字段都将调用相同的委托或目标/操作方法。因此，在这些方法的每个方法中，您需要找出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....
}

Answer 2

我遇到了同样的问题，并按照你所做的相同的路径走了。使用厄尔格雷给出的决议，我能够解决我的冲突。看看我的代码，你应该能够把你的代码弄清楚。我对你的最好建议是不要把这些字段看作是你已经完成的两个独立的代码，而是使用IF语句的一些代码。

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UITextField显示日期，但只有一个UITextField显示从DatePickers

2 个答案: