An NSTimer example

An NSTimer example in XCode.  The NSTimer object is used to run effect method which updates the content of the label with current count. [NSTimer example]

NSTimer *timergogo;

int timercount=0;

- (void)effect:(NSTimer *)aTimer{

NSString *timerset = [[NSString alloc] initWithFormat:@"%d",timercount++];

timerz.text = timerset;

}

-(IBAction)timerstart:(id)sender{

timergogo = [[NSTimer scheduledTimerWithTimeInterval:0.1 target:self 

selector:@selector(effect:)

userInfo:nil

  repeats:YES]retain];

}

-(IBAction)timerstop:(id)sender{

//[timergogo release]; 

//timergogo = nil;

[timergogo invalidate];

}

Output screen.