I have been trying this since long back, I need current UTC of current data time is it possible, If possible how can I achieve this.
what I have tried till
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"ddMMyyyy HH:mm"];
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
[formatter setTimeZone:timeZone];
NSDate *now = [NSDate date];
NSString *dateAsString = [formatter stringFromDate:now];
Thanks,
Nikhil.Ch
The NSDate object is already in UTC format when you perform initialization. Now the string representation of the UTC format might not be what you want so you can change the format to the following (or something similar):
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"];
NSString *localDateString = [dateFormatter stringFromDate:currentDate];
Related
I want to log the server time in my iOS app , I am using NHNetworkTime library to get the network time, when I try to print the following code its showing GMT, through I have chosen UTC, how to print the date time in UTC?
NSDate* datetime = [NSDate networkDate];
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"UTC"]]; // Prevent adjustment to user's local time zone.
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss.SSS Z z "];
NSString* dateTimeInIsoFormatForZuluTimeZone = [dateFormatter stringFromDate:datetime];
NSLog(#"%#",dateTimeInIsoFormatForZuluTimeZone);
this is printing 2016-03-09 06:51:23.406 +0000 GMT
There is no time difference between Coordinated Universal Time (UTC) and Greenwich Mean Time(GMT). you can get more info from here More info
Refer :-
-(NSString *)getUTCFormateDate:(NSDate *)localDate
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
[dateFormatter setTimeZone:timeZone];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSString *dateString = [dateFormatter stringFromDate:localDate];
[dateFormatter release];
return dateString;
}
Moreover to get time
-(NSString *)getTimeFromDate:(NSDate *)localDate
{
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc]init]autorelease];
dateFormatter.dateFormat = #"MM/dd/yy";
NSString *dateString = [dateFormatter stringFromDate: localDate];
NSDateFormatter *timeFormatter = [[[NSDateFormatter alloc]init]autorelease];
timeFormatter.dateFormat = #"HH:mm:ss";
return [timeFormatter stringFromDate: localDate];
}
inside my iOS App I have an NSDate Object that should be converted to a NSString showing date and time in UTC / GMT:
NSDateFormatter * dateTimeFormatter = [[NSDateFormatter alloc] init];
[dateTimeFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"GMT"]];
// OR [dateFormatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"UTC"]];
// OR [dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:#"GMT"]];
// OR [dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:#"UTC"]];
// OR [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
// OR not specify the TimeZone at all...
NSString *result = [dateTimeFormatter stringFromDate:date];
When I set a breakpoint and examine date it is correctly displayed as __NSDate * 2015-08-25 14:03:57 UTC. However the resulting string is 2015-08-25 16:03:57, which is the same date in my local TimeZone (CEST).
No matter which solution I tried to get a string in UTC /GMT format 2015-08-25 14:03:57, I always get the local version 2015-08-25 16:03:57.
All sources I found state, that this should work. Where is my mistake?
This code should works:
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
[formatter setTimeZone:timeZone];
NSDate *now = [NSDate date];
NSString *dateAsString = [formatter stringFromDate:now];
The only strange thing I see in your code it's that you use dateFormatter instead of dateTimeFormatter when set the NSTimeZone.
I am getting an value of 2015-04-22 10:43:57 from server but getting problem when converting into NSDate. I'd like to convert the same into NSDate into same format given in NSString. Here is my code
// getting from server
NSString *dateString=#"2015-04-22 10:43:57";
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate *aDate = [dateFormat dateFromString:dateString];
If I will get dateString with timezone then will it be resolved.
Your code looks correct.
I imagine you are having a problem with timezones while formatting. You culd addnit to your NSDateFormatter to specify if input date is from an specific timeZone
// set date format
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
dateFormatter.timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
Please use below code
NSString *dateString=#"2015-04-22 10:43:57";
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSTimeZone* localTimeZone = [NSTimeZone timeZoneWithAbbreviation:#"GMT"];
dateFormat.timeZone=localTimeZone;
NSDate *aDate = [dateFormat dateFromString:dateString];
OutPut: 2015-04-22 10:43:57 +0000
Hope it helps you..!
Your code is correct. You just try adding this line to your code.
//This will set time zone of your device.You can change systemTimeZone to localTimeZone based on your need.
[dateFormat setTimeZone:[NSTimeZone systemTimeZone]];
It looks easy, but I couldn't figure out a proper way to do this. I need to create an NSString from a NSDate which represents the same time on every device, independently from the iPhone's time zone settings.
Suppose userA is in London, where the actual time is 14:00, userB is in New York where is 9:00 and userC is in Hong Kong, where the actual time is 21:00.
NSDate *now = [[NSDate alloc] init];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"MM/dd/yy HH:mm:ss"];
NSString *dateString = [dateFormatter stringFromDate:now];
Actually with this code I'm getting these results (when I log the dateString):
userA: 08/12/14 14:00:00
userB: 08/12/14 09:00:00
userC: 08/12/14 21:00:00
But I need to create dates like this
userA: 08/12/14 14:00:00
userB: 08/12/14 14:00:00
userC: 08/12/14 14:00:00
My goal is to create a "system/absolute time" which is the same inside the app and doesn't matter the original time zone of the user's device. The end result must look like this MM/dd/yy HH:mm:s.
Is it possible to get the NSDate *now = [[NSDate alloc] init]; from a pre-defined timezone? For example it could always use the actual time of the GMT-00 timezone.
I've tried to do it with this code, but when I run the code, the console writes out the wrong date (based on the device time zone setting) again, so I don't have a better idea. I would appreciate any ideas.
NSDate *now = [[NSDate alloc] init];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
dateFormatter.timeZone = [NSTimeZone timeZoneWithAbbreviation:#"Europe/London"];
[dateFormatter setDateFormat:#"MM/dd/yy HH:mm:ss"];
NSString *dateString = [dateFormatter stringFromDate:now];
NSLog(#"the date is %#,", dateString);
The below code should work. What ever the timezone you are in it will always display the time in UTC.
NSDate *now = [[NSDate alloc] init];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[[NSTimeZone alloc] initWithName:#"UTC"]];
[dateFormatter setDateFormat:#"MM/dd/yy HH:mm:ss"];
NSString *dateString = [dateFormatter stringFromDate:now];
NSLog(#"%#",dateString);
Between the following two threads, I think you'll find everything you need (and thensome). The first is an extensive example of a problem similar to yours (just remember to look at the code in the answers and not the question), while the second has all the time zone abbreviations that you'll ever need. Gotta love the helpful people on The Stack.
The links again, just in case
objective-c: Conversion between TimeZones
GMT timezone conversion in objective c
NSDate *localDate = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
dateFormatter.dateFormat = #"MM/dd/yy";
NSString *dateString = [dateFormatter stringFromDate: localDate];
NSDateFormatter *timeFormatter = [[NSDateFormatter alloc]init];
timeFormatter.dateFormat = #"HH:mm:ss";
NSString *dateString = [timeFormatter stringFromDate: localDate];
I get the following NSString from my web API: #"2013-12-03T19:13:56+00:00"
I want to take this NSString and create the corresponding NSDate by using NSDateFormatter. For the life of me I can not figure out the formatting string that will help me do this. I always get nil. Here is what I am trying:
+ (NSDate *)dateFromUTCFormattedDateString:(NSString *)dateString
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
[dateFormatter setTimeZone:timeZone];
[dateFormatter setDateFormat:#"YYYY-MM-ddThh:mm:ssTZD"];
// Apply the date formatter and return it.
return [dateFormatter dateFromString:dateString];
}
One problem is the timezone with the embedded ':'. Use the following date format:
#"yyyy-MM-dd'T'HH:mm:sszzz"
Notice that the 'zzz' in place of the 'TZD'.
See ICU User Guide: Formatting Dates and Times
Test:
NSString *dateString = #"2013-12-03T19:13:56+00:00";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSTimeZone *timeZone = [NSTimeZone timeZoneWithName:#"UTC"];
[dateFormatter setTimeZone:timeZone];
[dateFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:sszzz"];
NSDate *dateFromString = [dateFormatter dateFromString:dateString];
NSLog(#"dateFromString: %#", dateFromString);
NSLog output:
dateFromString: 2013-12-03 19:13:56 +0000