Question

I have created a custom class which show time date formatter and I need a timer like method to update the seconds, so here is my code :

CustomClass.m

- (NSString *) showLocaleTime {

            NSDateFormatter *timeFormater = [[NSDateFormatter alloc] init];
timeFormater = [setDateFormat:@"HH:mm:ss "];

NSString *currDay = [timeFormater stringFromDate:[NSDate date]];
currDay = [NSString stringWithFormat:@"%@",currDay];
[timeFormater release];


    return timer;
}


- (void) updateLocaleTime {

    [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(showLocaleTime) userInfo:nil repeats:YES];

}

viewController.m :

CustomClass *time = [[CustomClass alloc]init];
label.text = [time showLocaleTime];

[time updateLocaleTime];

But the problem is the updateLocaleTime does not call to update seconds ! am I missing something ?
Thanks

Answer 1

Instead of calling updateLocaleTime in CustomClass, just start the timer in the view controller itself.

[NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(updateLocaleTime) userInfo:nil repeats:YES];

Add updateLocaleTime method to the viewController

- (void) updateLocaleTime {

   CustomClass *time = [[CustomClass alloc]init];
   label.text = [time showLocaleTime];
   [time release];
}

But here we are allocating and releasing the CustomClass again and again for every 0.5 seconds. Instead you declare it as class member, in .h file and allocate that in viewDidLoad.

So no need to allocate in updateLocaleTime method. Also release that time in viewDidUnload method.