//Setup gestureRecognizers
	UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapListener:)];
	tapRecognizer.numberOfTapsRequired = 1;
	tapRecognizer.delegate = self;
	[previewPort addGestureRecognizer:tapRecognizer];
	[tapRecognizer release];

	UITapGestureRecognizer *dblTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dblTapListener:)];
	dblTapRecognizer.numberOfTapsRequired = 2;
	dblTapRecognizer.delegate = self;
	[previewPort addGestureRecognizer:dblTapRecognizer];
	[dblTapRecognizer release];

	UITapGestureRecognizer *triTapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(triTapListener:)];
	triTapRecognizer.numberOfTapsRequired = 3;
	triTapRecognizer.delegate = self;
	[previewPort addGestureRecognizer:triTapRecognizer];
	[triTapRecognizer release];

	[tapRecognizer requireGestureRecognizerToFail:dblTapRecognizer];
	[tapRecognizer requireGestureRecognizerToFail:triTapRecognizer];
	[dblTapRecognizer requireGestureRecognizerToFail:triTapRecognizer];



.......



- (void)tapListener:(UIGestureRecognizer *)event {
	NSLog(@"Single");
}

- (void)dblTapListener:(UIGestureRecognizer *)event {
	NSLog(@"Double");
}

- (void)triTapListener:(UIGestureRecognizer *)event {
	NSLog(@"Tri");
}