ios - swift 不使用 UIDatePicker 更新 textfield.text

Question

在 swift 中，我有一个以编程方式声明的 textField。

override func viewDidLoad() {
    super.viewDidLoad()
textField3.delegate = self

    textField3.returnKeyType = UIReturnKeyType.Next;
    datePicker.datePickerMode = UIDatePickerMode.Date
    datePicker.addTarget(self, action: Selector("handleDatePicker:"), forControlEvents: UIControlEvents.ValueChanged)
    textField3.inputView = datePicker


}

 func handleDatePicker(sender: UIDatePicker) {

    textField3.text = dateFormatter.stringFromDate(sender.date)
            }

我发现的所有其他问题都与界面生成器的处理类似，但没有帮助。我将如何以编程方式解决这个问题？

Answer 1

Xcode 9 • Swift 4

@objc func handleDatePicker(_ datePicker: UIDatePicker) {
    textField3.text = datePicker.date.formatted
}

override func viewDidLoad() {
    super.viewDidLoad()
    datePicker.addTarget(self, action: #selector(handleDatePicker), forControlEvents: .valueChanged)
}

---

extension Date {
    static let formatter: DateFormatter = {
        let formatter = DateFormatter()
        formatter.dateFormat = "EEEE, dd MMM yyyy HH:mm:ss Z"
        return formatter
    }()
    var formatted: String {
        return Date.formatter.string(from: self)
    }
}