我有一个只有时间的 UIDatePicker 变量。我希望能够为不同的 TextFields 设置不同的时间。我的设置方式是，当我改变一次时，它们都会改变。

代码:

*@IBOutlets for all the UITextFields...*

private var datePicker = UIDatePicker()

override func viewDidLoad() {
    super.viewDidLoad()

    self.setupDatePicker()
    self.setupTextFields()
}

func setupDatePicker() {
    self.datePicker.frame = CGRect(x: 0, y: 50, width: self.view.frame.width, height: 200)
    self.datePicker.timeZone = NSTimeZone.local
    self.datePicker.datePickerMode = .time
    self.datePicker.minuteInterval = 30
    self.datePicker.backgroundColor = .white
    self.datePicker.addTarget(self, action: #selector(self.timeValueChanged(_:)), for: .valueChanged)
}

func setupTextFields() {
    self.mondayOpenTF.inputView = self.datePicker
    self.mondayCloseTF.inputView = self.datePicker
    self.tuesdayOpenTF.inputView = self.datePicker
    self.tuesdayCloseTF.inputView = self.datePicker
    self.wednesdayOpenTF.inputView = self.datePicker
    self.wednesdayCloseTF.inputView = self.datePicker
    self.thursdayOpenTF.inputView = self.datePicker
    self.thursdayCloseTF.inputView = self.datePicker
    self.fridayOpenTF.inputView = self.datePicker
    self.fridayCloseTF.inputView = self.datePicker
    self.saturdayOpenTF.inputView = self.datePicker
    self.saturdayCloseTF.inputView = self.datePicker
    self.sundayOpenTF.inputView = self.datePicker
    self.sundayCloseTF.inputView = self.datePicker
}

@objc
func timeValueChanged(_ sender: UIDatePicker) {
    let dateFormatter: DateFormatter = DateFormatter()
    dateFormatter.dateFormat = "h:mm a"
    let date: String = dateFormatter.string(from: sender.date)

    self.mondayOpenTF.text = date as String
    self.mondayCloseTF.text = date as String
    self.tuesdayOpenTF.text = date as String
    self.tuesdayCloseTF.text = date as String
    self.wednesdayOpenTF.text = date as String
    self.wednesdayCloseTF.text = date as String
    self.thursdayOpenTF.text = date as String
    self.thursdayCloseTF.text = date as String
    self.fridayOpenTF.text = date as String
    self.fridayCloseTF.text = date as String
    self.saturdayOpenTF.text = date as String
    self.saturdayCloseTF.text = date as String
    self.sundayOpenTF.text = date as String
    self.sundayCloseTF.text = date as String
}

是否可以使用一个 UIDatePicker 来单独管理所有时间，还是我必须创建 14 个不同的来填充每个文本字段？

最佳答案

因此，如果您只想使用提供的日期填充当前选择的 文本字段，并且您所有的文本字段都位于 ViewController 的MAIN View (或任何 View 你指定，你只需要确保你正在循环抛出其 subview 的 View 包含你的 UITextFields)，你可以只检查哪个文本字段是第一响应者，然后向它添加数据，像这样:

@objc
func timeValueChanged(_ sender: UIDatePicker) {
    let dateFormatter: DateFormatter = DateFormatter()
    dateFormatter.dateFormat = "h:mm a"
    let date: String = dateFormatter.string(from: sender.date)

    if let textfield = view.subviews.first(where: { $0 is UITextField }) as? UITextView, textfield.isFirstResponder {
        textfield.text = date
    }
}

此外，您还可以使用类似的方法清理设置代码，如下所示:

setupTextFields() {

    for textfield in (view.subviews.map {$0 as? UITextField}.flatMap{$0}) {
        textfield.inputView = datePicker
    }
}

关于ios - Swift:一个 UITimePicker，多个文本字段，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47358415/