nsdateformatter

问题 I'm trying to parse a string that was generated by an NSDateFormatter using another NSDateFormatter with the same format. Rather than trying to make that previous sentence make sense, here's some code: NSDateFormatter *format = [[NSDateFormatter alloc] init]; [format setDateFormat:@"MMM dd, YYYY HH:mm"]; NSDate *now = [[NSDate alloc] init]; NSString *dateString = [format stringFromDate:now]; NSDateFormatter *inFormat = [[NSDateFormatter alloc] init]; [inFormat setDateFormat:@"MMM dd, YYYY HH

问题 In my App if IPhone device time is in 12 hour formate then date formatter works correctly but if device time is in 24 hour formate then app crashed. let dateFormatter = NSDateFormatter(); dateFormatter.dateStyle = NSDateFormatterStyle.ShortStyle dateFormatter.timeStyle = NSDateFormatterStyle.NoStyle; dateFormatter.dateFormat = "hh:mm a"; var dt1 = dateFormatter.dateFromString(arrSecond.objectAtIndex(n) as! String) 回答1: @Rajan Thanks for giving me idea of NSLocale . I set the dateformatter's

问题 For some reason some devices fail to convert a string to a date. This is my date converting code: func dateFromString(string: String) -> Date? { let f = DateFormatter.init() f.dateFormat = "yyyy-MM-dd HH:mm:ss" return f.date(from: string) } Now, through my analytics platform I capture when this return nil. I have no clue why so. I assume it has something to do with local and maybe timezone or 12/24h settings but I can't figure out what is the problem. More Details... I have tracked the

问题 For some reason some devices fail to convert a string to a date. This is my date converting code: func dateFromString(string: String) -> Date? { let f = DateFormatter.init() f.dateFormat = "yyyy-MM-dd HH:mm:ss" return f.date(from: string) } Now, through my analytics platform I capture when this return nil. I have no clue why so. I assume it has something to do with local and maybe timezone or 12/24h settings but I can't figure out what is the problem. More Details... I have tracked the

问题 My date string that I am getting is 2014-01-08T21:21:22.737+05:30 of this format. How do i confer it to NSDate? I tried: NSString *currentDateString = @"2014-01-08T21:21:22.737+05:30"; [dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss.SSS+05:30"]; NSDate *currentDate = [dateFormatter dateFromString:currentDateString]; NSLog(@"CurrentDate:%@", currentDate); It returns nil. Any thoughts? 回答1: Use this code it is working fine your dateFormatter was wrong . NSDateFormatter *dateFormatter=[

问题 In my app I store the date as a string("MM/dd/YYYY" format). In the DB. later when I retrieve the string I have to compare two dates, how do I achieve this? If I had used the"YYYY/MM/dd" format I could have directly compared it as strings. Now I have to convert back into NSDate object using "nsdateformatter" and "dateFromString". But I get a constant date value using this no matter what I do. Any ideas?? 回答1: NSDateFormatter* df = [[NSDateFormatter alloc] init]; [df setDateFormat:@"MM/dd/yyyy

问题 I'm trying to convert a string to NSDate here is my code let strDate = "2015-11-01T00:00:00Z" // "2015-10-06T15:42:34Z" let dateFormatter = NSDateFormatter() dateFormatter.dateFormat = "yyyy-MM-ddTHH:mm:ssZ" print ( dateFormatter.dateFromString( strDate ) ) I keep getting nil as a result 回答1: The "T" in the format string needs to be single quoted so it will not be consider a symbol: Swift 3.0 let strDate = "2015-11-01T00:00:00Z" let dateFormatter = DateFormatter() dateFormatter.dateFormat =

问题 DateFormatter is acting funny to me: let dateFormatter = NSDateFormatter() dateFormatter.dateFormat = "MM'/'DD'/'YYYY" var dateString = "09/28/1989" var date = dateFormatter.dateFromString(dateString) println(date) Returns: "Optional(1988-12-24 13:00:00 +0000)" Any kind of help will be appreciated. 回答1: It looks like your date formatter is a bit off. "MM'/'DD'/'YYYY" reads "Padded month / day of the year (not month) / year of the current week (so Jan 1-6 could overlap and add side-effects)" I

问题 To be more precise this is not working for me: NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"YYYY-MM-ddTHH:mm:ssZ"]; NSDate *prevday = [formatter dateFromString:@"2011-04-07T22:00:48Z"]; prevday is returning NIL. 回答1: You need to inserts ticks in the string: @"YYYY'-'MM'-'dd'T'HH':'mm':'ss'Z'" 回答2: According to this document; http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DataFormatting/Articles/dfDateFormatting10_4.html%23/

问题 I know there is a lot of questions of this type, but I did't find solution for my case; I need to get current and correct NSDate object, not NSString ! This code returns wrong time (+3 hours), because I'm from Ukraine. NSDate *currentDate = [NSDate date]; How to get current NSDate object from NSDateFormatter ? I know only how to get NSString , but I don't need it. EDIT: I'm using this code to compare 2 NSDates using NSCalendar object, here is code: NSCalendar *calendar = [NSCalendar