nsdateformatter

问题 Currently I'm working on NSDate and NSDateFormatter . My issue is I need to find the date after 100 days of the user specified date. Currently I'm using this hard-coded string for finding a future date. calendar.maximumDate = [self.dateFormatter dateFromString:@"20/08/2015"]; But it is not correct way and not work with user specified date. Is there anyway to achieve this ? Please help me. Thanks in advance. 回答1: Like this: // How much day to add int addDaysCount = 100; // Create and

问题 Ok I feel kind of dumb asking this, but any idea why this is not working: { NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"mmmm dd, yyyy"]; NSDate *myDateFromString = [formatter dateFromString:creditDate.text]; NSLog(@"%@", myDateFromString); [self.credit setCertificationDate: myDateFromString]; } It returns null 回答1: Format and string don't match because "m" is minute and "M" is month. So "August 18 2012" can't be interpreted, take "MMMM dd yyyy"

问题 Having some problems parsing date. I have an array of supported formats and once I receive the date (string) from API, I try to parse it iterating through the formats until I get a valid NSDate object. A snippet from Xcode Playground -- let dateString = "02/06/1987" // --> want to parse into this Feb 6, not Jun 2 let dateFormatIncorrect = "dd.MM.yyyy" let dateFormatCorrect = "MM/dd/yyyy" let dateFormatter = NSDateFormatter() dateFormatter.dateFormat = dateFormatIncorrect let date =

问题 I want to convert timeUTC to "5s ago." ago label also thinking 12h / 24h changes on the phone. Because goes crash. Now below lines of code return label value what I want in the Playground. But not on my ios project. It doesn't go into If block. What I'm missing or What's the wrong with that? let dateStringUTC = "2016-10-22 12:37:48 +0000" let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss ZZZ" if let from = dateFormatter.date(from: dateStringUTC) {

问题 I have the data as customerFromDate " 01 Apr 2010 " and customerToDate " 30 Apr 2010 " which is a string. I want to convert that format into the string "yyyy-MM-dd", but when doing so I got null values. Please see the following code which I had tried. printf("\n customerFromDate %s",[customerStatementObj.customerFromDate UTF8String]); printf("\n customerToDate %s",[customerStatementObj.customerToDate UTF8String]); /* prints as the following customerFromDate 01 Apr 2010 customerToDate 30 Apr

问题 I am trying to show time on graph and i have a full time stamp in this @"2012-08-28 18:50:24" format. when i try to get time from this date then it returns nil in NSDate. NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"HH:mm:ss"]; NSDate *time = [formatter dateFromString:@"2012-08-28 18:50:24"]; in this code only if I change [formatter setDateFormat:@"HH:mm:ss"]; line to [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; then it starts working with full

问题 I have some code that's breaking in Swift 2.0: let formatter = NSDateComponentsFormatter() formatter.allowedUnits = NSCalendarUnit.Year formatter.allowedUnits |= .Month formatter.allowedUnits |= .WeekOfMonth formatter.allowedUnits |= .Day formatter.allowedUnits |= .Hour formatter.allowedUnits |= .Minute I get the error Binary operator '|=' cannot be applied to 'NSCalenderUnit' operands . What's the new way of doing this kinda thing? 回答1: NSCalendarUnit is an OptionSetType in Swift 2, instead

问题 My task is to parse string with time to NSDate. And I do it very well with following code: NSString* timeStr = @"15:00:00" NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setLocale:[NSLocale localeWithLocaleIdentifier:@"en_US_POSIX"]]; [formatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"GMT"]]; [formatter setDateFormat:@"HH:mm:ss"]; NSDate* result = [formatter dateFromString:timeStr]; But as a result I get 2000-01-01 15:00:00 CET and I dont understand why

问题 The result is still a day before, I'm just asking myself why, because the NSTimeZone is properly set and is the right one for my country (italy, rome) here's my stub of code, any ideas? NSString *dateString = @"03/07/2008"; NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setFormatterBehavior:[NSDateFormatter defaultFormatterBehavior]]; [formatter setDateFormat:@"dd/MM/yyyy"]; [formatter setLocale:[NSLocale currentLocale]]; [formatter setTimeZone:[NSTimeZone

问题 I have a date in a string with this format "2017-03-14" (yyyy-MM-dd) and i am trying to convert it into a string with this format "Tuesday, March 14, 2017". This is my code: let dateFormatter = DateFormatter() dateFormatter.dateFormat = "yyyy-MM-dd" let date = dateFormatter.date(from: "2017-03-14") Now if i print the value of "date", i get this: 2017-03-13 22:00:00 +0000 This is just the day before. Why is that ? EDIT: I need to compare date before formatting it. var newDateString : String =