44

如果我有一个 UIDatePicker，并且我希望将最小和最大日期范围设置在三十年前和未来三十年之间，我将如何设置它？

4

8 回答 8

89

未经测试，但您可能想要这样的东西。

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[NSDateComponents alloc] init];
[comps setYear:30];
NSDate *maxDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[comps setYear:-30];
NSDate *minDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];

[datePicker setMaximumDate:maxDate];
[datePicker setMinimumDate:minDate];

Swift 4.1 更新

let calendar = Calendar(identifier: .gregorian)
var comps = DateComponents()
comps.year = 30
let maxDate = calendar.date(byAdding: comps, to: Date())
comps.year = -30
let minDate = calendar.date(byAdding: comps, to: Date())
datePicker.maximumDate = maxDate
datePicker.minimumDate = minDate
于 2010-06-17T20:10:51.447 回答
19 
m_datePicker.maximumDate = [NSDate date];

您可以使用这行代码来设置最大日期（今天）。

于 2012-08-24T09:31:02.170 回答
6

我的@toddg swift 4 版本是：

let currentDate = Date()
var dateComponents = DateComponents()
let calendar = Calendar.init(identifier: .gregorian)
dateComponents.year = -100
let minDate = calendar.date(byAdding: dateComponents, to: currentDate)
dateComponents.year = -13
let maxDate = calendar.date(byAdding: dateComponents, to: currentDate)

对我有用！

于 2017-11-28T10:07:19.833 回答
5

将最大日期设置为今天 Swift 4.2

datePicker.maximumDate = Date()
于 2019-01-25T10:21:16.827 回答
3

改编@warrenm 对 Swift 的回答：

let currentDate = NSDate()
let dateComponents = NSDateComponents()
dateComponents.year = -13
let minDate = calendar.dateByAddingComponents(dateComponents, toDate: currentDate, options: NSCalendarOptions(rawValue: 0))
dateComponents.year = 30
let maxDate = calendar.dateByAddingComponents(dateComponents, toDate: currentDate, options: NSCalendarOptions(rawValue: 0))


dobPicker.maximumDate = maxDate
dobPicker.minimumDate = minDate
于 2016-09-01T22:56:00.933 回答
2

今天正在研究这个问题，并在 Swift 3 中提出了一个扩展 UIDatePicker 的解决方案。

extension UIDatePicker
{
    /// set the date picker values and set min/max
    /// - parameter date: Date to set the picker to
    /// - parameter unit: (years, days, months, hours, minutes...)
    /// - parameter deltaMinimum: minimum date delta in units
    /// - parameter deltaMaximum: maximum date delta in units
    /// - parameter animated: Whether or not to use animation for setting picker
    func setDate(_ date:Date, unit:NSCalendar.Unit, deltaMinimum:Int, deltaMaximum:Int, animated:Bool)
    {
        setDate(date, animated: animated)

        setMinMax(unit: unit, deltaMinimum: deltaMinimum, deltaMaximum: deltaMaximum)
    }

    /// set the min/max for the date picker (uses the pickers current date)
    /// - parameter unit: (years, days, months, hours, minutes...)
    /// - parameter deltaMinimum: minimum date delta in units
    /// - parameter deltaMaximum: maximum date delta in units
    func setMinMax(unit:NSCalendar.Unit, deltaMinimum:Int, deltaMaximum:Int)
    {
        if let gregorian = NSCalendar(calendarIdentifier:.gregorian)
        {
            if let minDate = gregorian.date(byAdding: unit, value: deltaMinimum, to: self.date)
            {
                minimumDate = minDate
            }

            if let maxDate = gregorian.date(byAdding: unit, value: deltaMaximum, to: self.date)
            {
                maximumDate = maxDate
            }
        }
    }
}

该setDate方法将设置UIDatePicker实例的三个值（日期、最小值、最大值）。

setMinMax只设置最小值和最大值。最小值和最大值是使用选取器的当前日期计算的。

单位可以是以下值：

  • 。年
  • 。月
  • 。天
  • 。小时
  • 。分钟
  • 。第二

要设置正负三十年的日期，代码将是：

var datePicker = UIDatePicker()
var date = Date()

datePicker.setDate(date, unit:.year, deltaMinimum:-30, deltaMaximum:30, animated:true)
于 2017-07-28T04:15:07.977 回答
1

请试试这个代码 iOS8+

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[NSDateComponents alloc] init];
[comps setYear:30];
NSDate *maxDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];
[comps setYear:-30];
NSDate *minDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];

[datePicker setMaximumDate:maxDate];
[datePicker setMinimumDate:minDate];
于 2016-04-20T15:00:32.913 回答
0

将最小日期设置为今天的日期

@IBOutlet var datePicker: UIDatePicker!

datePicker.minimumDate = NSDate() as Date

即使滚动到较旧的日期，这也会使 DatePicker 自动滚动到当前日期

于 2021-02-20T09:13:22.643 回答