iOS Drawing a PNG to a CALayer

#import <UIKit/UIKit.h>
#import <QuartzCore/QuartzCore.h>

@interface DrawPNGOnCALayerViewController : UIViewController {
	CGImageRef img;
	CALayer* noteLayer;
	UIImageView* imgView;
}

@end

#import "DrawPNGOnCALayerViewController.h"

@implementation DrawPNGOnCALayerViewController




// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {

    }
    return self;
}


// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
	
	noteLayer = [[CALayer alloc] init];	
	[self.view.layer addSublayer:noteLayer];
	
	/*imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"note.png"]];
	[self.view addSubview:imgView];*/
}

- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {}

- (void)viewWillAppear:(BOOL)animated {
	/*
	noteLayer.delegate = self;
	noteLayer.bounds = CGRectMake(0.f, 0.f, 200.f, 200.f);
	noteLayer.backgroundColor = [[UIColor blueColor] CGColor];
	noteLayer.position = self.view.center;
	[noteLayer setNeedsDisplay];
	*/
	
	UIImage* image = [UIImage imageNamed:@"note.png"];
	img = CGImageRetain( image.CGImage );
	
	noteLayer.delegate = self;
	noteLayer.bounds = CGRectMake( 0.f,0.f, 200., 200. );
	noteLayer.backgroundColor = [[UIColor blueColor] CGColor];
	NSLog(@"img = %f,%f",CGImageGetWidth(img),CGImageGetHeight(img));
	noteLayer.contents = (id)img;
	noteLayer.position = self.view.center;
	[noteLayer setNeedsDisplay];
}

- (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 {
	// Release any retained subviews of the main view.
	// e.g. self.myOutlet = nil;
}


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

@end