nsdate

So I have a date string I receive that looks like this: "2013-03-20T21:13:26-7:00" that I receive from a web back end. I have no control over the back end, just a fyi. My preference would be to have the date formatted like this: 9:13pm at 3/20. When I do the following NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; NSDate *date = [dateFormatter dateFromString:@"2013-03-20T21:13:26-7:00"]; date is null. My first thought is that the date string looks odd, and maybe I should remove the T and the "-7:00", as the "-7:00" is appended to every date I receive, and I'm not sure what it

I want to retrieve all the entries from core data added between two dates.I am using NSPredicate . As I am not getting the correct result I tried logging the date.It is showing the previous dates.After googling for a while I added [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]]; to my code.Now,Its showing correct dates but the results are still wrong. This is the code I used. NSDate *fromDate = [[self dateFormatter]dateFromString:self.fromDateField.text]; NSLog(@"%@",fromDate); NSDate *toDate = [[self dateFormatter]dateFromString:self.toDateField.text]; NSLog(@"%@",toDate)

I have a doubt that I cannot understand why is the way it is and I appeal to the Gods of this site :) I have a date coming like this: "1982-01-01T00:00:00Z" As I'm displaying whatever the server sends (I know, customer requirement, not good practice...), I'm forcing the device to have that TimeZone with the following method, simplified without error checking, not optimized, and all that kind of things: + (NSString *) yearStringFromDate: (NSDate *) date { NSDateFormatter *formatter = [NSDateFormatter new]; [formatter setDateFormat:@"YYYY"]; [formatter setTimeZone:[self timezoneForSIHF]]; return

Will dateA and dateB always be different? // Two [NSDate date] following each other NSDate *dateA = [NSDate date]; // Line X NSDate *dateB = [NSDate date]; // Line X+1 That is, will the line below always return NO? [dateA isEqualToDate:dateB] ("Always" meaning that like a very fast processor wouldn't execute the two commands so fast that dateA and dateB would be assigned the same time with "sub-second" accuracy). I want to have a "unique" timestamp for some internal identification (not DB-related). There is no promise that dateB will be after dateA . NSDate is based on the system clock, which

I have a string and need convert it to a date, but it doesn't convert correctly. I don't know why... my code is: NSString * fecha = @"2011-12-07 11:11:29.657"; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss.ZZZ"]; NSDate *dateFromString = [[NSDate alloc] init]; dateFromString = [dateFormatter dateFromString:fecha]; NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; unsigned units = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit

I am working with a schedule that specifies times of day, such as 10:30 AM. I do not know the dates, however. I'm going to store these as values in a NSDictionary and would like to deal with them in a straightforward way. I can't use NSDate , since I don't have a date. At least, not in a straightforward way. The other way that seems obvious is NSTimeInterval , but that looks like it's probably a source of very subtle errors. I'm thinking in particular of daylight savings time (which is on my mind this week for some reason!). Other than that, the only things that really spring to mind are

How can I get the exact difference (in decimal) between 2 values of NSDate . Eg. Jan 15 2016 to Jul 15 2017 = 1.5 Years . I can use something like: NSCalendar.currentCalendar().components(NSCalendarUnit.CalendarUnitYear, fromDate: date1, toDate: date1, options: nil).year but this gives me absolute values . i.e. for above example it would give me 1 Year . Is it possible to get exact values correct to at least a few decimal places? The terms you've used here are misleading. When you say "absolute" you mean "integral." And when you say "exact" you mean "within some desired precision." Let's say

Im using [NSDate date] to get the current time. Everything works fine if user don't change the time...I mean if user changed manually instead of setting it automatically. Then how can I get the original time? Thank you! Silviu St You can't find this out. The only way that goes through my mind is to take date from your server.. :( NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; // display in 12HR/24HR (i.e. 11:25PM or 23:25) format according to User Settings [dateFormatter setTimeStyle:NSDateFormatterShortStyle]; NSString *startTime = [dateFormatter stringFromDate:startDateTime