57

我想从日期选择器中获取最小和最大日期，但最小日期应该是当前日期的“- 18”，最大日期应该是当前日期的“- 100”。

假设当前年份是 2018 年，那么我想要最小日期 2000 年和最大日期 1918 年。

到目前为止我所做的是：

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:NSYearCalendarUnit fromDate:[NSDate date]];

NSInteger year = [components year];

int mindt = year - 18;

int maxdt = year -100;

   // NSDate * MinDate = [components year] - 18;

   // NSDate * MaxDate =  [components year] - 100;

   // self.datePicker.minimumDate = MinDate;

   // self.datePicker.maximumDate = MaxDate;

但我无法将此整数转换为我的日期格式..

4

12 回答 12

83

试试这个：

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDate *currentDate = [NSDate date];
NSDateComponents *comps = [[NSDateComponents alloc] init];
[comps setYear:-18];
NSDate *minDate = [gregorian dateByAddingComponents:comps toDate:currentDate  options:0];
[comps setYear:-150];
NSDate *maxDate = [gregorian dateByAddingComponents:comps toDate:currentDate  options:0];
[comps release];

self.datePicker.minimumDate = minDate;
self.datePicker.maximumDate = maxDate;

它可以很容易地翻译成 Swift 4.2：

    let calendar = Calendar(identifier: .gregorian)

    let currentDate = Date()
    var components = DateComponents()
    components.calendar = calendar

    components.year = -18
    components.month = 12
    let maxDate = calendar.date(byAdding: components, to: currentDate)!

    components.year = -150
    let minDate = calendar.date(byAdding: components, to: currentDate)!

    picker.minimumDate = minDate
    picker.maximumDate = maxDate
于 2012-05-08T07:31:46.613 回答
47

看看这个 Swift 版本。用户负值 (-)减去和正值添加日期组件。

1.设置最短日期 

 yourDatePicker.minimumDate = Calendar.current.date(byAdding: .year, value: -1, to: Date())

2.设置最大日期 

 yourDatePicker.maximumDate = Calendar.current.date(byAdding: .year, value: 1, to: Date())
于 2018-05-30T07:02:00.263 回答
20

斯威夫特 5.1

extension UIDatePicker {
    func set18YearValidation() {
        let currentDate: Date = Date()
        var calendar: Calendar = Calendar(identifier: Calendar.Identifier.gregorian)
        calendar.timeZone = TimeZone(identifier: "UTC")!
        var components: DateComponents = DateComponents()
        components.calendar = calendar
        components.year = -18
        let maxDate: Date = calendar.date(byAdding: components, to: currentDate)!
        components.year = -150
        let minDate: Date = calendar.date(byAdding: components, to: currentDate)!
        self.minimumDate = minDate
        self.maximumDate = maxDate
    } }
于 2018-01-10T09:27:12.057 回答
16

这就是 2017 年的样子（Swift 3）

    var components = DateComponents()
    components.year = -100
    let minDate = Calendar.current.date(byAdding: components, to: Date())

    components.year = -18
    let maxDate = Calendar.current.date(byAdding: components, to: Date())

    datePicker.minimumDate = minDate
    datePicker.maximumDate = maxDate
于 2017-02-07T09:18:31.040 回答
15

在Swift 2.1中：

    let currentDate: NSDate = NSDate()

    let calendar: NSCalendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)!
    // let calendar: NSCalendar = NSCalendar.currentCalendar()
    calendar.timeZone = NSTimeZone(name: "UTC")!

    let components: NSDateComponents = NSDateComponents()
    components.calendar = calendar

    components.year = -18
    let minDate: NSDate = calendar.dateByAddingComponents(components, toDate: currentDate, options: NSCalendarOptions(rawValue: 0))!

    components.year = -150
    let maxDate: NSDate = calendar.dateByAddingComponents(components, toDate: currentDate, options: NSCalendarOptions(rawValue: 0))!

    self.dateOfBirthUIDatePicker.minimumDate = minDate
    self.dateOfBirthUIDatePicker.maximumDate = maxDate

    print("minDate: \(minDate)")
    print("maxDate: \(maxDate)")
于 2015-04-02T13:40:56.557 回答
8

斯威夫特 3.0

 let gregorian: NSCalendar = NSCalendar(calendarIdentifier: NSCalendar.Identifier.gregorian)!
    let currentDate: Date = Date()
    let components: NSDateComponents = NSDateComponents()

    components.year = -150
    let minDate: Date = gregorian.date(byAdding: components as DateComponents, to: currentDate, options: NSCalendar.Options(rawValue: 0))!

    components.year = -16
    let maxDate: Date = gregorian.date(byAdding: components as DateComponents, to: currentDate, options: NSCalendar.Options(rawValue: 0))!

    self.datepicker.minimumDate = minDate
    self.datepicker.maximumDate = maxDate
于 2017-06-02T15:35:52.873 回答
3

** UIDatePicker 中的最小和最大日期：#Swift

**如果您想选择两个日期值之间的最小和最大日期，请使用以下简单代码：**

例如：最小日期：01-04-2017 和最大日期：31-03-2018

let calendar = Calendar.current
var minDateComponent = calendar.dateComponents([.day,.month,.year], from: Date())
minDateComponent.day = 01
minDateComponent.month = 04
minDateComponent.year = 2017

let minDate = calendar.date(from: minDateComponent)
print(" min date : \(String(describing: minDate))")

var maxDateComponent = calendar.dateComponents([.day,.month,.year], from: Date())
maxDateComponent.day = 0
maxDateComponent.month = 03 + 1
maxDateComponent.year = 2018

let maxDate = calendar.date(from: maxDateComponent)
print("max date : \(String(describing: maxDate))")

picker.minimumDate = minDate! as Date
picker.maximumDate =  maxDate! as Date
于 2017-07-04T06:56:19.110 回答
2

在 Objective C 中，NSDateComponents *comps = [[NSDateComponents alloc] init];

NSDateComponents *components = [calendar components:(NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay) fromDate:[NSDate date]];

NSInteger year = components.year;
NSInteger month = components.month;
NSInteger day = components.day;
NSInteger minimumYear = year - 1900;//Given some year here for example
NSInteger minimumMonth = month - 1;
NSInteger minimumDay = day - 1;
[comps setYear:-minimumYear];
[comps setMonth:-minimumMonth];
[comps setDay:-minimumDay];
NSDate *minDate = [calendar dateByAddingComponents:comps toDate:currentDate options:0];

[datePicker setMinimumDate:minDate];
[datePicker setMaximumDate:[NSDate date]];

最短日期是 1900 年 1 月 1 日。我希望它对你们所有人都有效.. :)

在 Swift 2.0 或更高版本中

    let calendar = NSCalendar(calendarIdentifier:NSCalendarIdentifierGregorian);

    let todayDate = NSDate()

    let components = calendar?.components([NSCalendarUnit.Year,NSCalendarUnit.Month,NSCalendarUnit.Day], fromDate: todayDate)
    let minimumYear = (components?.year)! - 1900
    let minimumMonth = (components?.month)! - 1
    let minimumDay = (components?.day)! - 1

    let comps = NSDateComponents();
    comps.year = -minimumYear
    comps.month = -minimumMonth
    comps.day = -minimumDay

    let minDate = calendar?.dateByAddingComponents(comps, toDate: todayDate, options: NSCalendarOptions.init(rawValue: 0))

    datePicker.minimumDate = minDate
    datePicker.maximumDate = datePicker.date
于 2015-07-22T05:05:42.740 回答
2

斯威夫特 4.1

我已经为基于 Calendar.Component 的所有类型的限制创建了我的扩展

extension UIDatePicker {

    func setLimit(forCalendarComponent component:Calendar.Component, minimumUnit min: Int, maximumUnit max: Int) {

        let currentDate: Date = Date()
        var calendar: Calendar = Calendar(identifier: Calendar.Identifier.gregorian)

        guard let timeZone = TimeZone(identifier: "UTC") else { return }
        calendar.timeZone = timeZone

        var components: DateComponents = DateComponents()
        components.calendar = calendar

        components.setValue(-min, for: component)
        if let maxDate: Date = calendar.date(byAdding: components, to: currentDate) {
            self.maximumDate = maxDate
        }

        components.setValue(-max, for: component)
        if let minDate: Date = calendar.date(byAdding: components, to: currentDate) {
            self.minimumDate = minDate
        }
    }

}

我们可以这样使用它：

self.datePicker.setLimit(forCalendarComponent: .year, minimumUnit: 13, maximumUnit: 100)
于 2018-05-29T08:59:33.463 回答
1

另一个案例：

假设我想将出生日期显示为日期选择器，Dob 在 1/1/1980 到 1/1/2000 的范围内。

@IBOutlet var datePicker: UIDatePicker!

override func viewDidLoad() {
        super.viewDidLoad()        
        datePicker.datePickerMode = UIDatePickerMode.date       


        // 01/01/1980 to 01/01/2000

        let calendar = Calendar.current
        var minDateComponent = calendar.dateComponents([.day,.month,.year], from: Date())
        minDateComponent.day = 01
        minDateComponent.month = 01
        minDateComponent.year = 1980

        let minDate = calendar.date(from: minDateComponent)
        print(" min date : \(minDate)")

        var maxDateComponent = calendar.dateComponents([.day,.month,.year], from: Date())
       maxDateComponent.day = 01
        maxDateComponent.month = 01
        maxDateComponent.year = 2000

        let maxDate = calendar.date(from: maxDateComponent)
        print("max date : \(maxDate)")

        self.datePicker.minimumDate = minDate! as Date
        self.datePicker.maximumDate =  maxDate! as Date

}
于 2017-05-05T09:37:10.750 回答
1

斯威夫特 4.0

UIDatePicker 扩展

extension UIDatePicker {
    func set18YearValidation() {
        let currentDate: NSDate = NSDate()
        let calendar: NSCalendar = NSCalendar(calendarIdentifier: NSCalendar.Identifier.gregorian)!
        calendar.timeZone = NSTimeZone(name: "UTC")! as TimeZone
        let components: NSDateComponents = NSDateComponents()
        components.calendar = calendar as Calendar
        components.year = -18
        let maxDate: NSDate = calendar.date(byAdding: components as DateComponents, to: currentDate as Date, options: NSCalendar.Options(rawValue: 0))! as NSDate
        components.year = -150
        let minDate: NSDate = calendar.date(byAdding: components as DateComponents, to: currentDate as Date, options: NSCalendar.Options(rawValue: 0))! as NSDate
        self.minimumDate = minDate as Date
        self.maximumDate = maxDate as Date
    } }
于 2017-11-18T04:15:30.330 回答
1

如果要将当前日期设置为日期选择器的最小值，请使用以下代码行：

datePicker.minimumDate = Date()
于 2021-12-28T11:47:46.447 回答