ios UIDatePicker 中的最小和最大日期
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Minimum and maximum date in UIDatePicker
提问by NSException
I want to get the minimum and maximum date from a date picker, but minimum date should be "- 18" of the current date and the maximum date should be "- 100" of current date.
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”。
Suppose current year is 2018 then I want minimum date 2000 and maximum date 1918.
假设当前年份是 2018 年，那么我想要最小日期 2000 和最大日期 1918。
What I have done so far is :
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;
but I cant get this integer to my date format..
但我无法将这个整数转换为我的日期格式..
回答by tilo
Try this:
尝试这个：
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;
It may be easily translated to Swift 4.2:
它可以很容易地转换为 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
回答by Rahul Panzade
Look at this for Swift version. User negative value (-) to subtractand positive value to adddate component.
看看这个 Swift 版本。用户负值 (-)减去和正值添加日期组件。
1. Set minimum date
1. 设置最小日期
yourDatePicker.minimumDate = Calendar.current.date(byAdding: .year, value: -1, to: Date())
2. Set maximum date
2. 设置最大日期
yourDatePicker.maximumDate = Calendar.current.date(byAdding: .year, value: 1, to: Date())
回答by swift2geek
Swift 5.1
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
} }
回答by King-Wizard
In Swift 2.1:
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)")
回答by cldrr
This is how it would look like in 2017 (Swift 3)
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
回答by Petro Nepyivoda
Swift 3.0
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
回答by Kiran jadhav
**Minimum and maximum date in UIDatePicker: #Swift
** UIDatePicker 中的最小和最大日期：#Swift
**if you want to select the min and max date between two date value use below simple code: **
**如果要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：**
for Example : Min Date : 01-04-2017 and Max Date : 31-03-2018
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
回答by g212gs
Swift 4.1
斯威夫特 4.1
I have created my extension for all type of limit based on Calendar.Component
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
}
}
}
We can use this as following:
我们可以这样使用它：
self.datePicker.setLimit(forCalendarComponent: .year, minimumUnit: 13, maximumUnit: 100)
回答by Vinay Podili
In Objective C, NSDateComponents *comps = [[NSDateComponents alloc] init];
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]];
The minimum date would be January 01 1900. I hope it works for you all.. :)
最短日期是 1900 年 1 月 1 日。我希望它对你们所有人都有效.. :)
In Swift 2.0 or later
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
回答by PinkeshGjr
Swift 4.0
斯威夫特 4.0
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
} }
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
} }
