Iphone UIDatePicker,基于今天日期设置最大和最小日期
如果我有一个UIDatePicker,并且我希望将最小和最大日期范围设置为30年前和未来30年之间,我将如何设置它?未测试,但您可能需要类似的设置Iphone UIDatePicker,基于今天日期设置最大和最小日期,iphone,objective-c,nsdate,uidatepicker,Iphone,Objective C,Nsdate,Uidatepicker,如果我有一个UIDatePicker,并且我希望将最小和最大日期范围设置为30年前和未来30年之间,我将如何设置它?未测试,但您可能需要类似的设置 NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSDate *currentDate = [NSDate date]; NSDateComponents *comps = [[NSDateComponents al
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的更新
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
您可以使用这行代码设置最长日期(今天)。请尝试使用这段代码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];
将@warrenm的答案改编为Swift:
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
我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
}
}
}
}
setDate
方法将设置UIDatePicker
实例的三个值(日期、最小值、最大值)
setMinMax
仅设置最小值和最大值。使用选择器的当前日期计算最小值和最大值
单位可以是以下值:
- .年
- .月
- .天
- .小时
- .分钟
- .第二
var datePicker = UIDatePicker()
var date = Date()
datePicker.setDate(date, unit:.year, deltaMinimum:-30, deltaMaximum:30, animated:true)
我的@toddg的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)
对我来说太棒了 将最大日期设置为今天Swift 4.2
datePicker.maximumDate = Date()
将最小日期设置为今天的日期
@IBOutlet var datePicker: UIDatePicker!
datePicker.minimumDate = NSDate() as Date
这将使DatePicker自动滚动到当前日期,即使滚动到较旧的日期如果您也有day和months列,是否会出现问题?它将以当前形式将月份和天数限制为当前日期。比如今天是2015年6月3日。几年就好了。日将停留在最大值3,月将停留在最大值juneNo。你只是在盲目猜测吗?不,我在我正在开发的一个应用程序中试过了,我遇到了我告诉你的问题。最后,我不得不将支票分别放在日期上。我只是在iOS 8上试用了它,并将
datePickerMode
设置为UIDatePickerModeDate
,效果如预期。我不知道您的实现中可能出现了什么问题,但是你可能想把它作为一个单独的问题发布。我已经为Swift 4.1创建了一个扩展:请从这里找到它:我如何隐藏日期>maximumDate?实际上,这会将最大日期设置为执行该行代码的精确分钟。它不允许用户选择比今天晚的日期,但用户会看到更晚的日期已经。
@IBOutlet var datePicker: UIDatePicker!
datePicker.minimumDate = NSDate() as Date