ScaleViewController.h

#import <UIKit/UIKit.h>

@interface ScaleTestViewController : UIViewController
@property (nonatomic, retain) IBOutlet UIView *scaleView;
@end

ScaleViewController.m

#import "ScaleTestViewController.h"

@implementation ScaleTestViewController
@synthesize scaleView=_scaleView;

- (void)viewDidLoad {
    [super viewDidLoad];
	
	UIView *view = [[[UIView alloc] initWithFrame:CGRectMake(234, 362, 300, 300)] autorelease];
	view.backgroundColor = [UIColor greenColor];
	[self.view addSubview:view];
	self.scaleView = view;
	
	UIPinchGestureRecognizer *recog = [[[UIPinchGestureRecognizer alloc] initWithTarget:self
																				 action:@selector(gestureRecognizerChanged:)] autorelease];
	[self.scaleView addGestureRecognizer:recog];
}

- (void)gestureRecognizerChanged:(UIPinchGestureRecognizer *)recog {
	if (recog.state == UIGestureRecognizerStateBegan) {
		recog.scale = recog.view.transform.a;
	} else {
		CGFloat scale = MAX(recog.scale, 1.0f);
		recog.view.transform = CGAffineTransformMakeScale(scale, scale);
	}
}

// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

- (void)didReceiveMemoryWarning {
	// Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
	
	// Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
	self.scaleView = nil;
}


- (void)dealloc {
	[_scaleView release];
    [super dealloc];
}

@end