nsdate

问题 I would like to have a function that takes a week number as input and returns an array of all the NSDates that this specific week is made by. Something like this: -(NSArray*)allDatesInWeek:(int)weekNumber { NSDate *today = [NSDate date]; NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; [calendar setFirstWeekday:2]; NSDateComponents *todayComp = [calendar components:NSYearCalendarUnit fromDate:today]; int currentyear = todayComp.year; /* Calculate and

问题 I make label with the date for today but I need hebrew date for today. this my code NSDate *today = [NSDate date]; NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init]; [dateFormat setDateStyle:NSDateFormatterShortStyle]; NSString *dateString = [dateFormat stringFromDate:today]; [_label setText:dateString]; I not build calendar this label with date for today. Thanks! 回答1: Assuming the user's current locale is not set for Hebrew, then you need to ensure the date formatter's locale is

问题 How can I get first and last days of the current week? What I need is some way of filtering a set of objects with NSDate property to leave only ones, that appear on current week, and then filter them by days. Also I need some way to get localized day names. I've tried to play with NSCalendar, NSDate and NSDateComponents, but it seems that I can't just check calendar's firstWeekday, as there might be weeks with days from previous/next month. 回答1: Use NSDateComponents to get the weekday, which

问题 I try to convert a string to NSDATE with no luck unfortunately. Friday, October 22, 11:26:45 ET 2010 I know the options for formatting (http://sree.cc/objective-c/nsdate-format-string-in-objective-c) but i cant get it to work. NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"???????"]; anyone? 回答1: Date Format Specifiers. So you'd probably need something like: [dateFormatter setDateFormat:@"eeee, MMMM dd, HH:mm:ss z yyyy"]; eeee - Local day of

问题 I got a NSDate for example 1/6 -12 (Friday) and trying to find out what weekday it is. My week starts at Monday so Friday should be weekday 5. NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; [calendar setFirstWeekday:2]; NSDateComponents *components = [calendar components:NSWeekdayCalendarUnit fromDate:firstOfJulyDate]; NSLog(@"weekday %i",components.weekday); Output: weekday 6 Doesn't matter what i set setFirstWeekday to, output will always be 6.

问题 This question already has answers here : How do I sort a swift array containing instances of NSManagedObject subclass by an attribute value (date) (5 answers) Closed 4 years ago . I have a model class called Event . import Foundation import MapKit public class Event { let id: Int var title: String? let status: String let location: String var description: String? var latitude: CLLocationDegrees? var longitude: CLLocationDegrees? var startDate: NSDate? var endDate: NSDate? init(id: Int,

问题 how I can get the NSDate of yesterday in iOS? Thanks 回答1: Here is one way to do that: NSDateComponents *components = [[[NSDateComponents alloc] init] autorelease]; [components setDay:-1]; NSDate *yesterday = [[NSCalendar currentCalendar] dateByAddingComponents:components toDate:[NSDate date] options:0]; Take a look at the Date and Time programming guide. 来源： https://stackoverflow.com/questions/7197994/how-i-can-get-the-nsdate-of-yesterday

问题 How would I convert an NSDate to a NSString, formatted with strftime specifiers? 回答1: you could use strftime. NSDate *date = [NSDate date]; time_t time = [date timeIntervalSince1970]; struct tm timeStruct; localtime_r(&time, &timeStruct); char buffer[80]; strftime(buffer, 80, "%d.%m.%Y %H:%M:%S", &timeStruct); NSString *dateStr = [NSString stringWithCString:buffer encoding:NSASCIIStringEncoding]; I hope it's correct. 回答2: You'll need an NSDateFormatter , using setDateFormat: . Here's the

问题 Using today as an example, how do I determine which date it was, 230 workdays ago? I know how to do it iteratively with a while loop checking date and subtracting 1 if it's a workday, but I'm wondering if there is a better method. Also, let's take a Sunday 1 PM as an example, and subtract 3 work days and 2 hours from that time. First, it doesn't make sense to subtract work-time from weekends. So it would have to move the time to 23:59:59 of Friday, and then subtract those 3 days and 2 hours.

问题 Let's suppose that today is Wednesday. I can break an NSDate down into NSDateComponents , but I need to find the NSDate with the next upcoming Monday. If today is Monday, then the next upcoming Monday is today. What's the right way to achieve this? 回答1: You can use nextDateAfterDate: method on NSCalendar object to achieve this, let now = Date() // today var matchingComponents = DateComponents() matchingComponents.weekday = 2 // Monday let comingMonday = Calendar.current.nextDate(after: now,