Get current iPhone device timezone date and time from UTC-5 timezone date and time iPhone app?
Solution 1
I have tested your scenario and added some code for your reference. Please test the below and please let me know it is useful for you.
NSString *dateStr = @"2012-07-16 07:33:01";
NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init];
[dateFormatter1 setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
NSDate *date = [dateFormatter1 dateFromString:dateStr];
NSLog(@"date : %@",date);
NSTimeZone *currentTimeZone = [NSTimeZone localTimeZone];
NSTimeZone *utcTimeZone = [NSTimeZone timeZoneWithAbbreviation:@"UTC"];
NSInteger currentGMTOffset = [currentTimeZone secondsFromGMTForDate:date];
NSInteger gmtOffset = [utcTimeZone secondsFromGMTForDate:date];
NSTimeInterval gmtInterval = currentGMTOffset - gmtOffset;
NSDate *destinationDate = [[[NSDate alloc] initWithTimeInterval:gmtInterval sinceDate:date] autorelease];
NSDateFormatter *dateFormatters = [[NSDateFormatter alloc] init];
[dateFormatters setDateFormat:@"dd-MMM-yyyy hh:mm"];
[dateFormatters setDateStyle:NSDateFormatterShortStyle];
[dateFormatters setTimeStyle:NSDateFormatterShortStyle];
[dateFormatters setDoesRelativeDateFormatting:YES];
[dateFormatters setTimeZone:[NSTimeZone systemTimeZone]];
dateStr = [dateFormatters stringFromDate: destinationDate];
NSLog(@"DateString : %@", dateStr);
Thanks.
Solution 2
NSDate* currentDate = [NSDate date];
NSTimeZone* CurrentTimeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
NSTimeZone* SystemTimeZone = [NSTimeZone systemTimeZone];
NSInteger currentGMTOffset = [CurrentTimeZone secondsFromGMTForDate:currentDate];
NSInteger SystemGMTOffset = [SystemTimeZone secondsFromGMTForDate:currentDate];
NSTimeInterval interval = SystemGMTOffset - currentGMTOffset;
NSDate* TodayDate = [[NSDate alloc] initWithTimeInterval:interval sinceDate:currentDate];
NSLog(@"Current time zone Today Date : %@", TodayDate);
Swift 4
var currentDate = Date()
var CurrentTimeZone = NSTimeZone(abbreviation: "GMT")
var SystemTimeZone = NSTimeZone.system as NSTimeZone
var currentGMTOffset: Int? = CurrentTimeZone?.secondsFromGMT(for: currentDate)
var SystemGMTOffset: Int = SystemTimeZone.secondsFromGMT(for: currentDate)
var interval = TimeInterval((SystemGMTOffset - currentGMTOffset!))
var TodayDate = Date(timeInterval: interval, since: currentDate)
print("Current time zone Today Date : \(TodayDate)")
Hope it helps to another developers ! Happy Coding !
Solution 3
May this extension would be easier.
Swift 4: UTC/GMT ⟺ Local (Current/System)
extension Date {
// Convert local time to UTC (or GMT)
func toGlobalTime() -> Date {
let timezone = TimeZone.current
let seconds = -TimeInterval(timezone.secondsFromGMT(for: self))
return Date(timeInterval: seconds, since: self)
}
// Convert UTC (or GMT) to local time
func toLocalTime() -> Date {
let timezone = TimeZone.current
let seconds = TimeInterval(timezone.secondsFromGMT(for: self))
return Date(timeInterval: seconds, since: self)
}
}
// Try it
let utcDate = Date().toGlobalTime()
let localDate = utcDate.toLocalTime()
print("utcDate - (utcDate)")
print("localDate - (localDate)")
Gopinath
Updated on February 20, 2020Comments
-
Gopinath about 4 years
In my iPhone application i am very struggling to convert the webservice response time to current device time. The
webservice time in UTC-5 timezone
. The app is worldwide use app. So i have to convert the response time to current device timezone. This is simple messaging app.When i have sent a
message the time is "5:05 PM" (India Chennai timezone)
but when am retrieve time fromwebservice is "2012-07-16 07:33:01"
. When i show the time in the app i should convert the time to device's local time. I have tried in some way but i can't solve yet. Code is:NSDateFormatter *dateFormatter1 = [[NSDateFormatter alloc] init]; [dateFormatter1 setDateFormat:@"yyyy-MM-dd HH:mm:ss"]; [dateFormatter1 setLocale:[NSLocale currentLocale]]; //[dateFormatter1 setTimeZone:[NSTimeZone timeZoneWithName:@"IST"]]; [dateFormatters setTimeZone:[NSTimeZone systemTimeZone]]; NSDate *date = [dateFormatter1 dateFromString:dateStr]; NSLog(@"date : %@",date);
But the output date and time is
2012-07-16 02:03:01 +0000
I have stored this date/time inCoredata
and when I have retrieve fromCoreData
and covert toNSString
using the below code,NSDateFormatter *dateFormatters = [[NSDateFormatter alloc] init]; [dateFormatters setDateFormat:@"dd-MMM-yyyy hh:mm"]; [dateFormatters setDateStyle:NSDateFormatterShortStyle]; [dateFormatters setTimeStyle:NSDateFormatterShortStyle]; [dateFormatters setDoesRelativeDateFormatting:YES]; [dateFormatters setTimeZone:[NSTimeZone systemTimeZone]]; dateStr = [dateFormatters stringFromDate:dateString]; NSLog(@"DateString : %@", dateStr);
The output date and time is "
Today 7:33 AM
". It should be show "Today 5:05 PM
". Can anyone please save my day? Please help to solve this issue. Thanks in advance.