NSInvocation (sending arguments with @selector)

recently i because quite disappointed when i learned that it's not possible to actually pass arguments with @selector() methods... i don't really know why that is, and it kinda pisses me off, but whatev...

so i'm trying to use NSInvocation to pass arguments thru a switch statement, but i need a little help. the following code isn't working:

Code:

NSUInteger tapCount = [[touches anyObject] tapCount];	
NSInvocation *invoke = [[NSInvocation alloc] init];
switch (tapCount)
	{
	case (2):	{
			[invoke setSelector:@selector(moveImage:withTouchPoint:withTapCount:)];
			[invoke setArgument:nil atIndex:0];
			[invoke setArgument:nil atIndex:1];
			[invoke setArgument:tapCount atIndex:2];
			[self performSelector:invoke withObject:nil afterDelay:kTapDelay];
			}
[COLOR="SeaGreen"]//etc.[/COLOR]

any thoughts?