IOS Countdown and Access time in this time zone

Countdown

Write a timer in Viewdidload.

[Nstimer scheduledtimerwithtimeinterval:1.0 target:self selector: @selector (timerfiremethod:) Userinfo:nil repeats: YES];

Then the method of declaring the timer

-(void) Timerfiremethod: (nstimer*) Thetimer

{

Define a Nscalendar Object

Nscalendar *cal = [Nscalendar Currentcalendar];

Initialize target time

Nsdatecomponents *shibo = [[Nsdatecomponents alloc] init]; [Shibo setyear:2014];

[Shibo Setmonth:12];

[Shibo setday:21];

[Shibo sethour:16];

[Shibo setminute:30];

[Shibo setsecond:0];

Load the target time into date

NSDate *todate = [cal Datefromcomponents:shibo];

Get current time

NSDate *today = [NSDate Date];

To get a specific time difference.

unsigned int unitflags = Nsyearcalendarunit | Nsmonthcalendarunit | Nsdaycalendarunit | Nshourcalendarunit | Nsminutecalendarunit | Nssecondcalendarunit;

Nsdatecomponents *d = [cal components:unitflags fromdate:today todate:todate options:0];

Lab is a global variable

Lab.text = [NSString stringwithformat:@ "%d%d months%d days%d"%d seconds ", [D year],[d Month], [D day],[d Hour], [D minute], [D second]];

}

Get time in this time zone

The time taken by this method is not local time, but GMT time

NSDate *gmtdate = [NSDate Date];

NSLog (@ "currentdate%@", gmtdate);//currentdate 2014-12-04 05:49:57 +0000

local time

Nstimezone *timezone = [Nstimezone systemtimezone];

Nsinteger interval = [TimeZone secondsfromgmt];

NSDate *localedate = [Gmtdate datebyaddingtimeinterval:interval];

NSLog (@ "Localedate%@", localedate);

IOS Countdown and Access time in this time zone