Calling a NSTimer method

Question

Hi

I'm new to working with timers on the iPhone and would need some support.

I have a method as below that takes the time and update a label in my user interface. I also have an NSTimer that calls that method once a second (I only show hours and minutes). This works just fine, except for the first second the App is live (as I understand it takes one second before the timer calls the method).

I would like to call my method from viewDidLoad, but how can I supply the right arguments? Or is there a better way of doing this?

    // Timer for updating time
[NSTimer scheduledTimerWithTimeInterval: 1.0f target: self selector: @selector(updateTime:) userInfo: nil repeats: YES];    


-(void)updateTime: (NSTimer *) timer {

currentTime = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
// display in 12HR/24HR (i.e. 11:25PM or 23:25) format according to User Settings
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
NSString *currentTimeString = [dateFormatter stringFromDate:currentTime];
[dateFormatter release];

timeLabel.text =  currentTimeString;
}

Appreciate anything that would point me in the right direction.

Answer 1

In your method, you don't use the timer variable right? So, why just call [self updateTime:nil]. That should work

Answer 2

One more option ... you can do:

[NSTimer scheduledTimerWithTimeInterval: 0.01f target: self selector: @selector(updateTime:) userInfo: nil repeats: NO];    
[NSTimer scheduledTimerWithTimeInterval: 1.0f target: self selector: @selector(updateTime:) userInfo: nil repeats: YES];