UIDatePicker，显示带有年份和时间的完整日期

你能有一个UIDatePicker在 DatePicker 上显示日、月、年和时间，或者我需要进行自己的自定义UIPickerView? i.e.

2000 年 11 月 12 日星期一 5 20 AM

目前日期选择器.datePickerMode set to .dateTime shows

11 月 12 日星期一 5 上午 20 点

是的你可以。但你需要将两者结合起来。使用年份选择器视图，并将日期选择器的最小值设置为所选年份的第一天，最大值设置为该年的最后一天。您还需要设置您的UIDatePicker属性 [datePickerMode][1] 到.dateAndTime

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    @IBOutlet weak var pickerView: UIPickerView!
    @IBOutlet weak var datePicker: UIDatePicker!
    let years = Array(Date().year-3...Date().year+3)
    var date = Date()
    var lastIndex = 3
    override func viewDidLoad() {
        super.viewDidLoad()
        pickerView.delegate = self
        pickerView.dataSource = self
        datePicker.date = Date()
    }
    @IBAction func dateChanged(_ datePicker: UIDatePicker) {
        date = datePicker.date
        print(datePicker.date.year)
        print(datePicker.date)
    }
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        pickerView.selectRow(3, inComponent: 0, animated: true)
        setDatePickerMinimumAndMaximumDatesFor(year: years[3])
    }
    func pickerView(_ pickerView: UIPickerView,
                    numberOfRowsInComponent component: Int) -> Int {
        return years.count
    }
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return String(years[row])
    }
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    func setDatePickerMinimumAndMaximumDatesFor(year: Int) {
        datePicker.minimumDate = year.firstDayOfTheYear
        datePicker.maximumDate = year.lastDayOfTheYear
    }

    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
setDatePickerMinimumAndMaximumDatesFor(year: years[row])
        if let optionalDate = Calendar.current.date(byAdding: .year, value: (lastIndex > row ? row - lastIndex :  -(lastIndex - row)), to: date) {
            datePicker.date = optionalDate
        }
        print(datePicker.date.year)
        print(datePicker.date)
    }
}
extension Date {
    var year: Int {
        return Calendar.current.component(.year, from: self)
    }
}
extension Int {
    var firstDayOfTheYear: Date {
        return DateComponents(calendar: .current, year: self, month: 1, day: 1).date!
    }
    var lastDayOfTheYear: Date {
        return DateComponents(calendar: .current, year: self, month: 12, day: 31).date!
    }
}