Simple countdown and simple countdown

Simple countdown and simple countdown

 

-(Void) viewDidLoad {

[Super viewDidLoad];

[NSTimer scheduledTimerWithTimeInterval: 1.0 target: self selector: @ selector (timerMethod :) userInfo: nil repeats: YES];

}

 

-(Void) timerMethod :( NSTimer *) timer

{

// Create a NSCalendar object

NSCalendar * calendar = [NSCalendar currentCalendar];

NSDateComponents * Boom = [[NSDateComponents alloc] init];

Boom. year = 2015;

Boom. month = 7;

Boom. day = 8;

Boom. hour = 13;

Boom. minute = 59;

Boom. second = 30;

// Load the target time into date

NSDate * date = [calendar dateFromComponents: Boom];

// Obtain the current time

NSDate * currentDate = [NSDate date];

// Get the specific time difference

Unsigned int flags = NSCalendarUnitYear | NSCalendarUnitMonth | NSCalendarUnitDay | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond;

NSDateComponents * rub = [cal components: flags fromDate: currentDate toDate: date options: 0];

_ Boom. text = [NSString stringWithFormat :@"