ios - 键盘超越日期选择器

Question

当您点击文本字段时，我正在尝试显示日期选择器。这一切似乎工作正常，但一旦我关闭日期选择器，它就会显示键盘。

所以我基本上必须将其关闭两次才能真正消失。

我为选择器创建了一个文本字段类，如下所示

编辑将所有代码移至文本字段类

protocol TextFieldPickerDelegate {
    func pickerValueDidChange(date: Date, pickerMode: UIDatePickerMode, sender: TextFieldPicker)
}

public class TextFieldPicker: UITextField, UITextFieldDelegate {

    var pickerMode: UIDatePickerMode = .date

    @IBInspectable var pickerType: String? {
        willSet {
            for s in (newValue?.lowercased().getStrings())! {
                switch s {
                case "date":
                    pickerMode = .date
                case "dateandtime":
                    pickerMode = .dateAndTime
                case "countdowntimer":
                    pickerMode = .countDownTimer
                case "time":
                    pickerMode = .time
                default:
                    pickerMode = .date
                }
            }
        }
        didSet {
            setupTextField()
        }
    }

    var textFieldPickerDelegate: TextFieldPickerDelegate?

    func setupTextField() {
        createPicker()
    }

    override public func draw(_ rect: CGRect) {
        super.draw(rect)

        delegate = self
    }

    override public func caretRect(for position: UITextPosition) -> CGRect {
        return CGRect.zero
    }

    override public func shouldChangeText(in range: UITextRange, replacementText text: String) -> Bool {
        return false
    }

    public func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        return false
    }

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

    public func textFieldShouldEndEditing(_ textField: UITextField) -> Bool {
        self.resignFirstResponder()
        return true
    }

    func createPicker() {
        let datePicker = UIDatePicker()
        datePicker.datePickerMode = pickerMode
        datePicker.addTarget(self, action: #selector(pickerValueChange(_:)), for: .valueChanged)

        let pickerToolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 44))
        pickerToolBar.tintColor = UIColor.gray
        let doneButton = UIBarButtonItem(title: NSLocalizedString("done", comment: ""), style: .done, target: self, action: #selector(closePicker(_:)))
        let space = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
        pickerToolBar.setItems([space, doneButton], animated: true)

        self.inputView = datePicker
        self.inputAccessoryView = pickerToolBar
    }

    func closePicker(_ sender: Any) {
        self.resignFirstResponder()
    }

    func pickerValueChange(_ sender: UIDatePicker) {
        self.textFieldPickerDelegate?.pickerValueDidChange(date: sender.date, pickerMode: sender.datePickerMode, sender: self)
    }

    public func getDateString(date: Date, format: String) -> String {
        let timeFormatter = DateFormatter()
        timeFormatter.dateFormat = format
        return timeFormatter.string(from: date)
    }
}






// =================================================== OptionSet =================================================== \\
public struct PickerModes: OptionSet {
    private enum PickerMode: Int, CustomStringConvertible {
        case Date=1
        case DateAndTime=2
        case CountDownTimer=4
        case Time=8

        public var description: String {
            var shift = 0
            while (rawValue.hashValue >> shift != 1) { shift += 1 }
            return ["date", "dateandtime", "countdowntimer", "time"][shift]
        }
    }
    public let rawValue: Int
    public init(rawValue: Int) { self.rawValue = rawValue }
    private init(_ mode: PickerMode) { self.rawValue = mode.rawValue }

    static let Date = PickerModes(PickerMode.Date)
    static let DateAndTime = PickerModes(PickerMode.DateAndTime)
    static let CountDownTimer = PickerModes(PickerMode.CountDownTimer)
    static let Time = PickerModes(PickerMode.Time)
}

extension String {
    func getStrings() -> [String] {
        var stringArray: [String] = []
        let strings = self.characters.split{$0 == ","}.map(String.init)
        for s in strings {
            let string = s.removeSpaces()
            stringArray.append(string)
        }
        return stringArray
    }

    func removeSpaces() -> String {
        if self.characters.first == " " {
            var copy = self
            copy.characters.removeFirst()
            return copy.removeSpaces()
        } else {
            return self
        }
    }
}

此类完全负责显示日期选择器并处理显示正确类型的日期选择器，以防一个屏幕中需要多个不同的选择器。

编辑2
如果其他人尝试我的代码，它将正常工作，没有任何问题。我遇到的问题是，我不小心将自定义类设置为包含我的 UITextField 的 UIView，因此当我点击文本字段时，它会首先触发 的键盘>UIView 然后是 UIDatePicker，因此当 UIDatePicker 退出时键盘仍会在那里。

Answer 1

我一直在做一些研究，在我看来，在文本字段中创建日期选择器有更简单的方法。你可以只使用其中之一。 https://blog.apoorvmote.com/change-textfield-input-to-datepicker/