サポートのおかげで問題を解決できます
コード：-現在の週の開始日と終了日を示します。
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);
rangeOfUnit:startDate:interval:forDate: 。特定の時間単位の開始と間隔を提供します。これを使用すると、使用されているカレンダーで週の始まりを見つけ、その週の最新の秒を取得するために範囲-1を追加するのは簡単です。
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.
Swift 3バージョン：-
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)
}
}
次のように、週の開始日と終了日を取得できます。
let startWeek = Date().startOfWeek
let endWeek = Date().endOfWeek
print(startWeek ?? "not found start date")
print(endWeek ?? "not found end date")
A Swiftバージョン
vikingosegundoの- answer ：
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)
Swift 3（Xcode 8+）のエレガントな方法は次のとおりです。
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)!
}
}
この拡張機能は次のように使用できます。
print(Date().startOfWeek)
print(Date().endOfWeek)
最初に現在の日付を見つけます...
NSDate *today = [NSDate date];
NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *weekdayComponents = [gregorian components:NSWeekdayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:today];
週の最初の日を取得するために、今日から減算する日数を計算します。この場合、週の最初の日は月曜日です。これは、最初に曜日の整数で0を減算し、次にsetDayに2を加算することで表されます。
日曜日= 1、月曜日= 2、火曜日= 3、水曜日= 4、木曜日= 5、金曜日= 6、土曜日=7。この整数にさらに追加することにより、次の週に進みます。
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]];
週の最初の日の日付を作成する
NSDate *beginningOfWeek = [gregorian dateByAddingComponents:componentsToSubtract toDate:today options:0];
最初の日の日付に6を追加すると、この例では日曜日の最終日を取得できます。
NSDateComponents *componentsToAdd = [gregorian components:NSDayCalendarUnit fromDate:beginningOfWeek];
[componentsToAdd setDay:6];
NSDate *endOfWeek = [gregorian dateByAddingComponents:componentsToAdd toDate:beginningOfWeek options:0];
次と前の....
-(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]];
}
Swift 4ソリューション
私は自分の要件に従って、フォローする日付を見つけました。
1. Today
2. Tomorrow
3. This Week
4. This Weekend
5. Next Week
6. Next Weekend
だから、Date Extensionは、今週と来週の日付を取得します。
[〜＃〜] code [〜＃〜]
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)
}
}
使用法：
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
必要に応じてExtensionを変更できます。
ありがとう！
以下にコードを示します。また、週の始まりが前月に始まるEdgeのケースもチェックします。 setWeekdayを7に設定することで週末を取得でき、1から[components week]を引くことで前の週を取得できます
// 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];
}
Swift4のソリューションを次に示します。現在の週のすべての日を取得できます。
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) }
//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;
}
Swift
最初に現在の日付を見つけます...
let today = Date()
let gregorian = Calendar(identifier: .gregorian)
var weekdayComponents: DateComponents? = gregorian.dateComponents([.weekday], from: today)
日曜日= 1、月曜日= 2、火曜日= 3、水曜日= 4、木曜日= 5、金曜日= 6、土曜日= 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)"
}
}
次と前の....
@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!)
}
メソッドrangeOfUnit:startDate:interval:forDate: of NSDateの場合、これを実現する簡単な方法があります。
- (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]];
これで、今週の開始日と終了日が決まりました。それから先週：
NSDate *lastWeekDate = [this_start dateByAddingTimeInterval:-10];
NSDate *last_start = nil, *last_end = nil;
[self startDate:&last_start andEndDate:&last_end ofWeekOn:lastWeekDate];
来週：
NSDate *nextWeekDate = [this_end dateByAddingTimeInterval:10];
NSDate *next_start = nil, *next_end = nil;
[self startDate:&next_start andEndDate:&next_end ofWeekOn:nextWeekDate];
これですべて揃いました。
次のコードで現在の日付と日付を取得できます。
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);
ここで、開始日と終了日を計算するためのロジックを入れる必要があります。ロジックはそのようなものになりますが、
曜日が月曜日の場合
それから
開始日=現在の日付-0
終了日=現在の日付+ 6
等々
あなたはそれのアイデアを得ることができると思います。
Swift 4.2
現在の週の日付を表示する場合は、次のコードをご覧ください。
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)
}
}
In Swift 3.0
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)!)