NSCalendar NSYearForWeekOfYearCalendarUnit
Specify calendrical units such as day and month.
enum {
NSEraCalendarUnit = kCFCalendarUnitEra,
NSYearCalendarUnit = kCFCalendarUnitYear,
NSMonthCalendarUnit = kCFCalendarUnitMonth,
NSDayCalendarUnit = kCFCalendarUnitDay,
NSHourCalendarUnit = kCFCalendarUnitHour,
NSMinuteCalendarUnit = kCFCalendarUnitMinute,
NSSecondCalendarUnit = kCFCalendarUnitSecond,
NSWeekCalendarUnit = kCFCalendarUnitWeek,
NSWeekdayCalendarUnit = kCFCalendarUnitWeekday,
NSWeekdayOrdinalCalendarUnit = kCFCalendarUnitWeekdayOrdinal,
NSQuarterCalendarUnit = kCFCalendarUnitQuarter,
NSWeekOfMonthCalendarUnit = kCFCalendarUnitWeekOfMonth,
NSWeekOfYearCalendarUnit = kCFCalendarUnitWeekOfYear,
NSYearForWeekOfYearCalendarUnit = kCFCalendarUnitYearForWeekOfYear
NSCalendarCalendarUnit = (1 << 20),
NSTimeZoneCalendarUnit = (1 << 21),
};
typedef NSUInteger NSCalendarUnit;
Constants
NSEraCalendarUnit
Specifies the era unit.
The corresponding value is an NSInteger. Equal to kCFCalendarUnitEra.
NSYearCalendarUnit
Specifies the year unit.
The corresponding value is an NSInteger. Equal to kCFCalendarUnitYear.
NSMonthCalendarUnit
Specifies the month unit.
The corresponding value is an NSInteger. Equal to kCFCalendarUnitMonth.
NSDayCalendarUnit
Specifies the day unit.
The corresponding value is an NSInteger. Equal to kCFCalendarUnitDay.
NSHourCalendarUnit
Specifies the hour unit.
The corresponding value is an NSInteger. Equal to kCFCalendarUnitHour.
NSMinuteCalendarUnit
Specifies the minute unit.
The corresponding value is an NSInteger. Equal to kCFCalendarUnitMinute.
NSSecondCalendarUnit
Specifies the second unit.
The corresponding value is a double. Equal to kCFCalendarUnitSecond.
NSWeekCalendarUnit
Specifies the week unit.
The corresponding value is an kCFCalendarUnitSecond. Equal to kCFCalendarUnitWeek.
NSWeekdayCalendarUnit
Specifies the weekday unit.
The corresponding value is an kCFCalendarUnitSecond. Equal to kCFCalendarUnitWeekday. The weekday units are the numbers 1 through N (where for the Gregorian calendar N=7 and 1 is Sunday).
NSWeekdayOrdinalCalendarUnit
Specifies the ordinal weekday unit.
The corresponding value is an kCFCalendarUnitSecond. Equal to kCFCalendarUnitWeekdayOrdinal. The weekday ordinal unit describes ordinal position within the month unit of the corresponding weekday unit. For example, in the Gregorian calendar a weekday ordinal unit of 2 for a weekday unit 3 indicates "the second Tuesday in the month".
NSQuarterCalendarUnit
Specifies the quarter of the calendar as an kCFCalendarUnitSecond.
NSWeekOfMonthCalendarUnit
Specifies the original week of a month calendar unit.
NSWeekOfYearCalendarUnit
Specifies the original week of the year calendar unit.
NSYearForWeekOfYearCalendarUnit
Specifies the year when the calendar is being interpreted as a week-based calendar.
NSCalendarCalendarUnit
Specifies the calendar of the calendar.
NSTimeZoneCalendarUnit
Specifies the time zone of the calendar as an NSTimeZone.
Discussion of [NSCalendar NSYearForWeekOfYearCalendarUnit]
Calendar units may be used as a bit mask to specify a combination of units. Values in this enum are equal to the corresponding constants in the CFCalendarUnit enum.
NSCalendar NSYearForWeekOfYearCalendarUnit example.
NSCalendar *calendar = [NSCalendar currentCalendar];
calendar.firstWeekday = 2;
calendar.minimumDaysInFirstWeek = 4;
int n = [calendar rangeOfUnit:NSWeekOfYearCalendarUnit inUnit:NSYearForWeekOfYearCalendarUnit forDate: [NSDate date]].length;
NSLog(@"%d", n); // 52
calendar.firstWeekday = 2;
calendar.minimumDaysInFirstWeek = 4;
int n = [calendar rangeOfUnit:NSWeekOfYearCalendarUnit inUnit:NSYearForWeekOfYearCalendarUnit forDate: [NSDate date]].length;
NSLog(@"%d", n); // 52
Example of [NSCalendar NSYearForWeekOfYearCalendarUnit].
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* comps = [calendar components:NSYearForWeekOfYearCalendarUnit |NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:curDate];
[comps setWeekday:2]; // 2: monday
firstDayOfTheWeek = [calendar dateFromComponents:comps];
[comps setWeekday:7]; // 7: saturday
lastDayOfTheWeek = [calendar dateFromComponents:comps];
NSDateComponents* comps = [calendar components:NSYearForWeekOfYearCalendarUnit |NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:curDate];
[comps setWeekday:2]; // 2: monday
firstDayOfTheWeek = [calendar dateFromComponents:comps];
[comps setWeekday:7]; // 7: saturday
lastDayOfTheWeek = [calendar dateFromComponents:comps];
NSCalendar NSYearForWeekOfYearCalendarUnit example.
NSCalendar* calendar = [NSCalendar currentCalendar];
NSDateComponents* comps = [calendar components:NSYearForWeekOfYearCalendarUnit |NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:[NSDate date]];
[comps setWeekday:1];
int monthComponent = comps.month;
int yearComponent = comps.year;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy MM dd"];
NSDate *firstDateOfMonth = [dateFormatter dateFromString:[NSString stringWithFormat:@"%d %d 01",yearComponent,monthComponent]];
firstDateOfMonth = [firstDateOfMonth dateByAddingTimeInterval:19800];
NSLog(@"firstDateOfMonth-- %@ \r\n",firstDateOfMonth);
NSLog(@"[NSDate date]-- %@",[[NSDate date] dateByAddingTimeInterval:19800]);
NSDateComponents* comps = [calendar components:NSYearForWeekOfYearCalendarUnit |NSYearCalendarUnit|NSMonthCalendarUnit|NSWeekCalendarUnit|NSWeekdayCalendarUnit fromDate:[NSDate date]];
[comps setWeekday:1];
int monthComponent = comps.month;
int yearComponent = comps.year;
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy MM dd"];
NSDate *firstDateOfMonth = [dateFormatter dateFromString:[NSString stringWithFormat:@"%d %d 01",yearComponent,monthComponent]];
firstDateOfMonth = [firstDateOfMonth dateByAddingTimeInterval:19800];
NSLog(@"firstDateOfMonth-- %@ \r\n",firstDateOfMonth);
NSLog(@"[NSDate date]-- %@",[[NSDate date] dateByAddingTimeInterval:19800]);
