40

我想获取当前周的开始和结束日期，我还想使用上一周的开始和结束日期以及下周的开始和结束日期在当前月份。

提前致谢。

4

18 回答 18

66

rangeOfUnit:startDate:interval:forDate:. 它为您提供某个时间单位的开始和间隔。有了它，很容易在使用的日历中找到一周的开始，并添加 range-1 以获得该周最新的第二个。

NSCalendar *cal = [NSCalendar currentCalendar];
NSDate *now = [NSDate date];
NSDate *startOfTheWeek;
NSDate *endOfWeek;
NSTimeInterval interval;
[cal rangeOfUnit:NSWeekCalendarUnit 
       startDate:&startOfTheWeek 
        interval:&interval 
         forDate:now];
//startOfWeek holds now the first day of the week, according to locale (monday vs. sunday)

endOfWeek = [startOfTheWeek dateByAddingTimeInterval:interval-1];
// holds 23:59:59 of last day in week.
于 2013-06-07T21:22:44.950 回答
21

已解决问题感谢支持

代码：- 它给出了当前周的开始和结束日期。

 NSDate *today = [NSDate date];
 NSLog(@"Today date is %@",today);
 dateFormat = [[NSDateFormatter alloc] init];
 [dateFormat setDateFormat:@"yyyy-MM-dd"];// you can use your format.

 //Week Start Date 

 NSCalendar *gregorian = [[NSCalendar alloc]        initWithCalendarIdentifier:NSGregorianCalendar];

NSDateComponents *components = [gregorian components:NSWeekdayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:today];

int dayofweek = [[[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:today] weekday];// this will give you current day of week

[components setDay:([components day] - ((dayofweek) - 2))];// for beginning of the week.

NSDate *beginningOfWeek = [gregorian dateFromComponents:components];
NSDateFormatter *dateFormat_first = [[NSDateFormatter alloc] init];
[dateFormat_first setDateFormat:@"yyyy-MM-dd"];
dateString2Prev = [dateFormat stringFromDate:beginningOfWeek];

weekstartPrev = [[dateFormat_first dateFromString:dateString2Prev] retain];

NSLog(@"%@",weekstartPrev);


//Week End Date

 NSCalendar *gregorianEnd = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

 NSDateComponents *componentsEnd = [gregorianEnd components:NSWeekdayCalendarUnit | NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit fromDate:today];

 int Enddayofweek = [[[NSCalendar currentCalendar] components:NSWeekdayCalendarUnit fromDate:today] weekday];// this will give you current day of week

 [componentsEnd setDay:([componentsEnd day]+(7-Enddayofweek)+1)];// for end day of the week

 NSDate *EndOfWeek = [gregorianEnd dateFromComponents:componentsEnd];
 NSDateFormatter *dateFormat_End = [[NSDateFormatter alloc] init];
 [dateFormat_End setDateFormat:@"yyyy-MM-dd"];
 dateEndPrev = [dateFormat stringFromDate:EndOfWeek];

 weekEndPrev = [[dateFormat_End dateFromString:dateEndPrev] retain];
  NSLog(@"%@",weekEndPrev);
于 2012-07-30T06:50:22.137 回答
16

这是 Swift 3 版本：-

extension Date {
    var startOfWeek: Date? {
        let gregorian = Calendar(identifier: .gregorian)
        guard let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return nil }
        return gregorian.date(byAdding: .day, value: 1, to: sunday)
    }

    var endOfWeek: Date? {
        let gregorian = Calendar(identifier: .gregorian)
        guard let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return nil }
        return gregorian.date(byAdding: .day, value: 7, to: sunday)
    }
}

您可以像这样获得一周的开始日期和结束日期：

let startWeek = Date().startOfWeek
let endWeek = Date().endOfWeek

print(startWeek ?? "not found start date")
print(endWeek ?? "not found end date")
于 2017-06-30T13:16:48.737 回答
11

一个斯威夫特版本

的答案：vikingosegundo_

let calendar = NSCalendar.currentCalendar()
var startOfTheWeek: NSDate?
var endOfWeek: NSDate!
var interval = NSTimeInterval(0)

calendar.rangeOfUnit(.WeekOfMonth, startDate: &startOfTheWeek, interval: &interval, forDate: NSDate())
endOfWeek = startOfTheWeek!.dateByAddingTimeInterval(interval - 1)
于 2015-12-03T21:35:02.163 回答
9

Here's an elegant way for Swift 3 (Xcode 8+):

extension Date {
    var startOfWeek: Date {
        let date = Calendar.current.date(from: Calendar.current.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self))!
        let dslTimeOffset = NSTimeZone.local.daylightSavingTimeOffset(for: date)
        return date.addingTimeInterval(dslTimeOffset)
    }

    var endOfWeek: Date {
        return Calendar.current.date(byAdding: .second, value: 604799, to: self.startOfWeek)!
    }
}

And we can use this extension like this:

print(Date().startOfWeek)
print(Date().endOfWeek)
于 2016-11-08T01:33:15.273 回答
6

斯威夫特 4 解决方案

我已经根据我的要求弄清楚了，在那里我找到了以下日期。

1. Today

2. Tomorrow 

3. This Week 

4. This Weekend 

5. Next Week 

6. Next Weekend

所以，我创建Date Extension了 Dates of Current Week和Next Week。

代码

extension Date {

    func getWeekDates() -> (thisWeek:[Date],nextWeek:[Date]) {
        var tuple: (thisWeek:[Date],nextWeek:[Date])
        var arrThisWeek: [Date] = []
        for i in 0..<7 {
            arrThisWeek.append(Calendar.current.date(byAdding: .day, value: i, to: startOfWeek)!)
        }
        var arrNextWeek: [Date] = []
        for i in 1...7 {
            arrNextWeek.append(Calendar.current.date(byAdding: .day, value: i, to: arrThisWeek.last!)!)
        }
        tuple = (thisWeek: arrThisWeek,nextWeek: arrNextWeek)
        return tuple
    }

    var tomorrow: Date {
        return Calendar.current.date(byAdding: .day, value: 1, to: noon)!
    }
    var noon: Date {
        return Calendar.current.date(bySettingHour: 12, minute: 0, second: 0, of: self)!
    }

    var startOfWeek: Date {
        let gregorian = Calendar(identifier: .gregorian)
        let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self))
        return gregorian.date(byAdding: .day, value: 1, to: sunday!)!
    }

    func toDate(format: String) -> String {
        let formatter = DateFormatter()
        formatter.dateFormat = format
        return formatter.string(from: self)
    }
}

用法：

let arrWeekDates = Date().getWeekDates() // Get dates of Current and Next week.
let dateFormat = "MMM dd" // Date format
let thisMon = arrWeekDates.thisWeek.first!.toDate(format: dateFormat)
let thisSat = arrWeekDates.thisWeek[arrWeekDates.thisWeek.count - 2].toDate(format: dateFormat)
let thisSun = arrWeekDates.thisWeek[arrWeekDates.thisWeek.count - 1].toDate(format: dateFormat)

let nextMon = arrWeekDates.nextWeek.first!.toDate(format: dateFormat)
let nextSat = arrWeekDates.nextWeek[arrWeekDates.nextWeek.count - 2].toDate(format: dateFormat)
let nextSun = arrWeekDates.nextWeek[arrWeekDates.nextWeek.count - 1].toDate(format: dateFormat)

print("Today: \(Date().toDate(format: dateFormat))") // Sep 26
print("Tomorrow: \(Date().tomorrow.toDate(format: dateFormat))") // Sep 27
print("This Week: \(thisMon) - \(thisSun)") // Sep 24 - Sep 30
print("This Weekend: \(thisSat) - \(thisSun)") // Sep 29 - Sep 30
print("Next Week: \(nextMon) - \(nextSun)") // Oct 01 - Oct 07
print("Next Weekend: \(nextSat) - \(nextSun)") // Oct 06 - Oct 07

您可以Extension根据需要进行修改。

谢谢！

于 2018-09-26T07:17:20.357 回答
4

首先找到当前日期...

NSDate *today = [NSDate date];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *weekdayComponents     = [gregorian components:NSWeekdayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:today];

计算从今天减去的天数，以获得一周的第一天。在这种情况下，一周的第一天是星期一。这表示为首先用工作日整数减去 0，然后在 setDay 上加上 2。

星期日 = 1，星期一 = 2，星期二 = 3，星期三 = 4，星期四 = 5，星期五 = 6 和星期六 = 7。通过向这个整数添加更多，您将进入下一周。

NSDateComponents *componentsToSubtract  = [[NSDateComponents alloc] init];
[componentsToSubtract setDay: (0 - [weekdayComponents weekday]) + 2];   
[componentsToSubtract setHour: 0 - [weekdayComponents hour]];
[componentsToSubtract setMinute: 0 - [weekdayComponents minute]];
[componentsToSubtract setSecond: 0 - [weekdayComponents second]];

为一周中的第一天创建日期

NSDate *beginningOfWeek = [gregorian dateByAddingComponents:componentsToSubtract toDate:today options:0];

通过将第一天的日期加上 6，我们可以得到最后一天，在我们的示例中是星期日。

NSDateComponents *componentsToAdd = [gregorian components:NSDayCalendarUnit fromDate:beginningOfWeek];
[componentsToAdd setDay:6];
NSDate *endOfWeek = [gregorian dateByAddingComponents:componentsToAdd toDate:beginningOfWeek options:0];

对于下一个和上一个 ....

-(IBAction)Week_CalendarActionEvents:(id)sender{

    NSCalendar *gregorian = [[[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar] autorelease];
    NSDateComponents *offsetComponents = [[[NSDateComponents alloc] init] autorelease];
    NSDate *nextDate;

    if(sender==Week_prevBarBtn)  // Previous button events 
        [offsetComponents setDay:-7];
    else if(sender==Week_nextBarBtn) // next button events 
        [offsetComponents setDay:7];

    nextDate = [gregorian dateByAddingComponents:offsetComponents toDate:selectedDate options:0];

    selectedDate = nextDate;
    [selectedDate retain];

    NSDateComponents *components = [gregorian components:NSWeekCalendarUnit fromDate:selectedDate];
    NSInteger week = [components week];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"MMMM YYYY"];
    NSString *stringFromDate = [formatter stringFromDate:selectedDate];
    [formatter release];
    [Week_weekBarBtn setTitle:[NSString stringWithFormat:@"%@,Week %d",stringFromDate,week]];
}
于 2012-07-27T05:55:43.313 回答
3

这是 swift4 的解决方案，我们可以获取当前一周的所有天数。

var calendar = Calendar(identifier: Calendar.Identifier.gregorian)
let today = calendar.startOfDay(for: Date())    
let dayOfWeek = calendar.component(.weekday, from: today) - calendar.firstWeekday
let weekdays = calendar.range(of: .weekday, in: .weekOfYear, for: today)!
let days = (weekdays.lowerBound ..< weekdays.upperBound)
                    .flatMap { calendar.date(byAdding: .day, value: $0 - dayOfWeek, to: today) }
于 2018-01-23T10:03:03.403 回答
2

这是一些代码，它还检查一个边缘情况，即上个月开始的一周。您可以通过设置setWeekday来获得周末，您可以通过减去来7获得前一周1[components week]

// Finds the date for the first day of the week
- (NSDate *)getFirstDayOfTheWeekFromDate:(NSDate *)givenDate
{
    NSCalendar *calendar = [NSCalendar currentCalendar];

    // Edge case where beginning of week starts in the prior month
    NSDateComponents *edgeCase = [[NSDateComponents alloc] init];
    [edgeCase setMonth:2];
    [edgeCase setDay:1];
    [edgeCase setYear:2013];
    NSDate *edgeCaseDate = [calendar dateFromComponents:edgeCase];

    NSDateComponents *components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:edgeCaseDate];
    [components setWeekday:1]; // 1 == Sunday, 7 == Saturday
    [components setWeek:[components week]];

    NSLog(@"Edge case date is %@ and beginning of that week is %@", edgeCaseDate , [calendar dateFromComponents:components]);

    // Find Sunday for the given date
    components = [calendar components:NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:givenDate];
    [components setWeekday:1]; // 1 == Sunday, 7 == Saturday
    [components setWeek:[components week]];

    NSLog(@"Original date is %@ and beginning of week is %@", givenDate , [calendar dateFromComponents:components]);

    return [calendar dateFromComponents:components];
}
于 2013-02-04T14:29:52.630 回答
2

Swift 5.x 的解决方案

创建日期扩展：

func weekPeriod() -> (startDate: Date, endDate: Date) {
    let calendar = Calendar(identifier: .gregorian)
    guard let sundayDate = calendar.date(from: calendar.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return (startDate: Date(), endDate: Date()) }
    
    if calendar.isDateInToday(sundayDate) {
        let startDate = calendar.date(byAdding: .day, value: -6, to: sundayDate) ?? Date()
        let endDate = sundayDate
        return (startDate: startDate, endDate: endDate)
    }
    
    let startDate = calendar.date(byAdding: .day, value: 1, to: sundayDate) ?? Date()
    let endDate = calendar.date(byAdding: .day, value: 6, to: startDate) ?? Date()
    
    return (startDate: startDate, endDate: endDate)
}
于 2021-04-08T18:43:20.450 回答
2 
//Begining of Week Date

- (NSDate*) beginingOfWeekOfDate{

    NSCalendar *tmpCalendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [tmpCalendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitWeekOfYear|NSCalendarUnitWeekday fromDate:self];//get the required calendar units

    NSInteger weekday = tmpCalendar.firstWeekday;  
    components.weekday = weekday; //weekday
    components.hour = 0;
    components.minute = 0;
    components.second = 0;

    NSDate *fireDate = [tmpCalendar dateFromComponents:components];

    return fireDate;
}

//End of Week Date

-(NSDate *)endOfWeekFromDate{

    NSCalendar *tmpCalendar = [NSCalendar currentCalendar];
    NSDateComponents *components = [tmpCalendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitWeekOfYear|NSCalendarUnitWeekday fromDate:self];//get the required calendar units

    int weekday = 7; //Saturday
    if (tmpCalendar.firstWeekday != 1) {
        weekday = 1;
    }
    components.weekday = weekday;//weekday
    components.hour = 23;
    components.minute = 59;
    components.second = 59;

    NSDate *fireDate = [tmpCalendar dateFromComponents:components];

    return fireDate;
}
于 2016-08-23T12:54:39.943 回答
1

您可以通过以下代码获取当前日期和日期：

NSDate *today = [NSDate date];
    NSDateFormatter *dateFormat = [[[NSDateFormatter alloc] init] autorelease];
    [dateFormat setDateFormat:@"EEEE"];
    NSString *weekDay = [dateFormat stringFromDate:today];
    [dateFormat setDateFormat:@"dd"];
    NSString *thedate=[dateFormat stringFromDate:today];
    //[dateFormat release];
    NSLog(@"%@ %@", weekDay,thedate);

现在，您需要在其中添加一些逻辑来计算一周的开始日期和结束日期。逻辑会这样，

如果工作日是星期一

然后

开始日期 = 当前日期 - 0

结束日期 = 当前日期 + 6

等等

我想你可以理解它。

于 2012-07-27T05:32:29.233 回答
1

通过利用 的方法rangeOfUnit:startDate:interval:forDate:，NSDate有一种更简单的方法可以实现这一点：

- (void)startDate:(NSDate **)start andEndDate:(NSDate **)end ofWeekOn:(NSDate *)date{
    NSDate *startDate = nil;
    NSTimeInterval duration = 0;
    BOOL b = [[NSCalendar currentCalendar] rangeOfUnit:NSWeekCalendarUnit startDate:&startDate interval:&duration forDate:date];
    if(! b){
        *start = nil;
        *end = nil;
        return;
    }
    NSDate *endDate = [startDate dateByAddingTimeInterval:duration-1];
    *start = startDate;
    *end = endDate;
}

NSDate *this_start = nil, *this_end = nil;
[self startDate:&this_start andEndDate:&this_end ofWeekOn:[NSDate date]];

所以现在你有了本周的开始日期和结束日期。然后上周：

NSDate *lastWeekDate = [this_start dateByAddingTimeInterval:-10];
NSDate *last_start = nil, *last_end = nil;
[self startDate:&last_start andEndDate:&last_end ofWeekOn:lastWeekDate];

下周：

NSDate *nextWeekDate = [this_end dateByAddingTimeInterval:10];
NSDate *next_start = nil, *next_end = nil;
[self startDate:&next_start andEndDate:&next_end ofWeekOn:nextWeekDate];

现在你拥有了它们。

于 2013-05-05T07:22:25.157 回答
1

Swift 3+：带扩展的简单解决方案

extension Date {
    var startOfWeek: Date? {
        let gregorian = Calendar(identifier: .gregorian)
        guard let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return nil }
        return gregorian.date(byAdding: .day, value: 1, to: sunday)
    }

    var endOfWeek: Date? {
        let gregorian = Calendar(identifier: .gregorian)
        guard let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return nil }
        return gregorian.date(byAdding: .day, value: 7, to: sunday)
    }

    var yesterdayDate: Date? {
        return NSCalendar.current.date(byAdding: .day, value: -1, to: noon)!
    }

    var tommorowDate: Date? {
        return NSCalendar.current.date(byAdding: .day, value: 1, to: noon)!
    }

    var previousDate: Date? {
        let oneDay:Double = 60 * 60 * 24
        return self.addingTimeInterval(-(Double(oneDay)))
    }

    var nextDate: Date? {
        let oneDay:Double = 60 * 60 * 24
        return self.addingTimeInterval(oneDay)
    }

    var noon: Date {
        return NSCalendar.current.date(bySettingHour: 12, minute: 0, second: 0, of: self)!
    }

    var month: Int {
        return Calendar.current.component(.month,  from: self)
    }
}
于 2018-10-22T09:59:34.010 回答
1

斯威夫特 4.2

如果你想显示当前的星期日期，这里是代码。

  override func viewDidLoad() {
        super.viewDidLoad()

        for dateIndex in 0..<7 {
            guard let startWeek = Date().startOfWeek else { return }
            let date = Calendar.current.date(byAdding: .day, value: dateIndex + 1, to: startWeek)
            print(date)
        }

}



extension Date {
    var startOfWeek: Date? {
        let gregorian = Calendar(identifier: .gregorian)
        guard let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self)) else { return nil }
        return gregorian.date(byAdding: .day, value: 1, to: sunday)
    }
}
于 2019-06-25T09:27:34.727 回答
1

斯威夫特 3

首先找到当前日期...

    let today = Date()
    let gregorian = Calendar(identifier: .gregorian)
    var weekdayComponents: DateComponents? = gregorian.dateComponents([.weekday], from: today)

星期日 = 1，星期一 = 2，星期二 = 3，星期三 = 4，星期四 = 5，星期五 = 6，星期六 = 7。

    var componentsToSubtract = DateComponents()
    componentsToSubtract.day = (0 - (weekdayComponents?.weekday!)!) + 2

    beginningOfWeek = gregorian.date(byAdding: componentsToSubtract, to: today)

    var componentsToAdd: DateComponents? = gregorian.dateComponents([.day], from: beginningOfWeek!)
    componentsToAdd?.day = 6
    endOfWeek = gregorian.date(byAdding: componentsToAdd!, to: beginningOfWeek!)

    let components: DateComponents? = gregorian.dateComponents([.month], from: beginningOfWeek!)
    let month: Int? = components?.month

    let components1: DateComponents? = gregorian.dateComponents([.month], from: endOfWeek!)
    let month1: Int? = components1?.month

    print("\(month) - \(month1)")

    showDate(start:beginningOfWeek!, end:endOfWeek!, strtMn:month!, endMn:month1!)

func showDate(start:Date, end:Date, strtMn:Int, endMn:Int) {
    if strtMn == endMn{
        let formatter = DateFormatter()
        formatter.dateFormat = "MMM dd"
        let stringFromDate: String = formatter.string(from: start)

        let formatter1 = DateFormatter()
        formatter1.dateFormat = "dd"
        let stringFromDate1: String = formatter1.string(from: end)
        print("\(stringFromDate) - \(stringFromDate1)")
        lblDate.text = "\(stringFromDate) - \(stringFromDate1)"
    }
    else{
        let formatter = DateFormatter()
        formatter.dateFormat = "MMM dd"
        let stringFromDate: String = formatter.string(from: start)

        let formatter1 = DateFormatter()
        formatter1.dateFormat = "MMM dd"
        let stringFromDate1: String = formatter1.string(from: end)
        print("\(stringFromDate) - \(stringFromDate1)")
        lblDate.text = "\(stringFromDate) - \(stringFromDate1)"
    }
}

对于下一个和上一个 ....

@IBAction func week_CalendarActionEvents(_ sender: UIButton) {

    let gregorian = Calendar(identifier: .gregorian)
    var offsetComponents = DateComponents()
    var nextStrtDate: Date?
    var nextEndDate: Date?
    var startDate: Date?
    var endDate: Date?

    startDate = beginningOfWeek
    endDate = endOfWeek

    if sender.tag == 1 {
        offsetComponents.day = -7
    }
    else if sender.tag == 2 {
        offsetComponents.day = 7
    }

    nextStrtDate = gregorian.date(byAdding: offsetComponents, to:startDate!)
    startDate = nextStrtDate
    beginningOfWeek = startDate

    nextEndDate = gregorian.date(byAdding: offsetComponents, to: endDate!)
    endDate = nextEndDate
    endOfWeek = endDate

    let components: DateComponents? = gregorian.dateComponents([.month], from: startDate!)
    let month: Int? = components?.month

    let components1: DateComponents? = gregorian.dateComponents([.month], from: endDate!)
    let month1: Int? = components1?.month

    print("\(month)- \(month1)")

    showDate(start:startDate!, end:endDate!, strtMn:month!, endMn:month1!)
}
于 2017-05-03T07:53:21.360 回答
0
  • Start date从任何地区每周都需要 3 个步骤End date。
  1. 查找当天的星期几。
func getTodayWeekDay() -> String {
       let dateFormatter = DateFormatter()
       dateFormatter.dateFormat = "EEEE"
       let weekDay = dateFormatter.string(from: Date())
       return weekDay
}
  1. 让 emun 上课subtraction几天addition。

即，如果当前工作日是Wednesday获取Monday当前星期，我们必须-2从当前日期中减去。为了获得Sunday本周，我们必须添加4到当天。

enum WeekDays: String {
    case monday = "Monday"
    case tuesday = "Tuesday"
    case wednesday = "Wednesday"
    case thursday = "Thursday"
    case friday = "Friday"
    case saturday = "Saturday"
    case sunday = "Sunday"
    
    var daysToSubstract: Int {
        switch self {
        case .monday: return 0
        case .tuesday: return -1
        case .wednesday: return -2
        case .thursday: return -3
        case .friday: return -4
        case .saturday: return -5
        case .sunday: return -6
        }
    }
    
    var daysToAdd: Int {
        switch self {
        case .monday: return 6
        case .tuesday: return 5
        case .wednesday: return 4
        case .thursday: return 3
        case .friday: return 2
        case .saturday: return 1
        case .sunday: return 0
        }
    }
}
  1. 从当天Start-week开始。End-week_subtractionaddition
extension Date {
    var startOfWeek: String? {
        let gregorian = Calendar(identifier: .gregorian)
        let startWeek = dateFormatter.string(from:gregorian.date(byAdding: .day, value: WeekDays(rawValue: getTodayWeekDay())?.daysToSubstract ?? 0, to: self)!)
        print("start-week--- \(startWeek)")
        return startWeek
    }

    var endOfWeek: String? {
        let gregorian = Calendar(identifier: .gregorian)
        let endWeek = dateFormatter.string(from:gregorian.date(byAdding: .day, value: WeekDays(rawValue: getTodayWeekDay())?.daysToAdd ?? 6, to: self)!)
        print("end-week--- \(endWeek)")
        return endWeek
    }
}
  • 您可以使用如下功能：
Date().startOfWeek
Date().endOfWeek
于 2021-12-18T13:56:45.373 回答
0

在 Swift 3.0 中

let cal = NSCalendar.current


//weekday
let weekday = cal.component(.weekday, from: Date())

var dateComp = cal.dateComponents([.hour, .minute, .second, .day, .month, .year], from: Date())
print(dateComp.day!)


//Start Date of the week - Sunday
dateComp.day = dateComp.day! - (weekday - 1)// start date of week

print(cal.date(from: dateComp)!)


//End Date of the Week - Saturday
dateComp = cal.dateComponents([.hour, .minute, .second, .day, .month, .year], from: Date())


dateComp.day = dateComp.day! + (7 - weekday)

print(cal.date(from: dateComp)!)
于 2017-05-09T12:46:09.310 回答