Need help with timer

[mapper724]

I need help trying to figure out how to declare my countDown thingy. I need to know how and where to declare it. can anyone help me? I followed the tutorial by Nitrex88 and I just omitted the animation part of the code. and i keep getting the " 'countDown' undeclared first use in function. " error. I've included the timer part of the .m file and the entire .h file.

//Timer
-(IBAction)timeStart {
	time = 60.0;
	timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:(countDown) userInfo:nil repeats:YES];	<<<<ERROR HERE----
}

-(void) countDown {
	time = time - 1;
	if (timer == 0){
		[timer invalidate];
	}
	[self updateTimeLabel];
}

-(void) updateTimeLabel {
	timeLabel.text = [NSString stringWithFormat:@"%i Sec", time];	
}

Here's my .h

@interface iTap_Really_FastViewController : UIViewController {
    IBOutlet UILabel *timeLabel;
	NSTimer *timer;
	NSUInteger time;
	IBOutlet UILabel *tapsLabel;
	IBOutlet UIImageView *tapButton;
}


@property (nonatomic, retain) NSTimer *timer;
@property (nonatomic, retain) UILabel *timeLabel;
@property (nonatomic, retain) UILabel *tapsLabel;
@property (nonatomic, retain) UIImageView *tapButton;
-(void)updateLabelsFromTouches:(NSSet *)touches;
-(IBAction)timeStart;
-(void)countDown;
-(void)updateTimeLabel;

[smasher]

The "selector:" parameters expects a selector, which you need to get with the "@selector" directive. Try this:

timer = [NSTimer scheduledTimerWithTimeInterval:1.0
     target:self
     selector:@selector(countDown)  // I added @selector() here
     userInfo:nil repeats:YES];

Also, you want "if (time == 0)" not "if (timer == 0)" . You want to check your counter, not the timer object.