TimerExample.m

#pragma mark Actions
- (IBAction)callMyMom:(id)sender
{
	// Update the text view, disable the button
	[textView insertText:@"Time to call Mom!\n"];
	[self disableButton:sender];
	
	// We're going to make an NSDictionary containing
	// the button, so we can pass it to our timer
	NSDictionary *userInfo = [NSDictionary dictionaryWithObject:sender forKey:@"button"];
	
	// Now we create a timer scheduled to fire in one second
	[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(reenableTimer:) userInfo:userInfo repeats:NO];
}

#pragma mark Button methods
- (void)enableButton:(NSButton *)theButton
{
	[theButton setEnabled:YES];
	[theButton setBezelStyle:NSRegularSquareBezelStyle];
}
- (void)disableButton:(NSButton *)theButton
{
	[theButton setBezelStyle:NSTexturedSquareBezelStyle];
	[theButton setBordered:YES];
	[theButton setTitle:@"Called Mom"];
	[theButton setEnabled:NO];
}

#pragma mark Timer handler
- (void)reenableTimer:(NSTimer *)theTimer
{
	// Grab the button from our user info dict
	NSButton *theButton = [[theTimer userInfo] objectForKey:@"button"];
	[self enableButton:theButton];
}