iOS UIView animations problem

[lawicko]

Hi,
I need some help with a small application I created to learn how animations work. My application consists of one UIView, one UIImageView, 2 buttons for scaling UIImageView up and down.

@class AnimationsViewController;

@interface AnimationsAppDelegate : NSObject <UIApplicationDelegate> {
	IBOutlet UIWindow *window;
	UIView* theView;
	UIImageView* theImageView;
	UIButton* scaleUpButton;
	UIButton* scaleDownButton;
	BOOL scalingUp;
	BOOL scalingDown;
}

@property (nonatomic, retain) UIWindow *window;

- (void)scaleUpButtonTouchDown;
- (void)scaleUpButtonTouchUp;
- (void)scaleDownButtonTouchDown;
- (void)scaleDownButtonTouchUp;

- (void)continueScalingUp;
- (void)continueScalingDown;

@end

- (void)scaleUpButtonTouchDown {
	NSLog(@"scale up button touch down");
	NSLog(@"ustawiam scalingUp na 1");
	scalingUp = YES;
	[NSThread detachNewThreadSelector:@selector(continueScalingUp) toTarget:self withObject:nil];
}

- (void)continueScalingUp {
	NSAutoreleasePool * thePool = [[NSAutoreleasePool alloc] init];
	
	NSLog(@"continue scaling up");
	while(scalingUp) {
		[UIView beginAnimations:nil context:nil];
		if(scale<5.03) {
			scale+=.01;
		}
		NSLog(@"scale up multiplier = %f",scale);
		[UIView setAnimationDuration:.15];
		CGAffineTransform transform = CGAffineTransformMakeScale(scale,scale);
		theImageView.transform = transform;
		[UIView commitAnimations];
	}
	[thePool release];
}

- (void)scaleUpButtonTouchUp {
	NSLog(@"scale up button touch up inside");
	NSLog(@"ustawiam scalingUp na 0");
	scalingUp = NO;
}

- (void)scaleDownButtonTouchDown {
	NSLog(@"scale down button touch down");
	scalingDown = YES;
	[NSThread detachNewThreadSelector:@selector(continueScalingDown) toTarget:self withObject:nil];

}

- (void)continueScalingDown {
	NSAutoreleasePool * thePool = [[NSAutoreleasePool alloc] init];
	
	NSLog(@"continue scaling down");
	while(scalingDown) {
		[UIView beginAnimations:nil context:nil];
		if(scale>.02) {
			scale-=.01;
		}
		NSLog(@"scale down multiplier = %f",scale);
		[UIView setAnimationDuration:.15];
		CGAffineTransform transform = CGAffineTransformMakeScale(scale,scale);
		theImageView.transform = transform;
		[UIView commitAnimations];
	}
	[thePool release];
}

- (void)scaleDownButtonTouchUp {
	NSLog(@"scale down button touch up inside");
	scalingDown = NO;
}

So the main view looks like this:

So when I touch the scale up button and hold it, the image should be scaled. And it is, but I cannot see any transition When I touch and hold the button it looks like nothing is happening, but when I release the button, the image is instantly scaled up. It would be really cool if I could see the image getting bigger and bigger while holding the button, so can anyone tell me what am I missing or what am I doing wrong?