Loading images to UIScrollview crashes

[IckyThump]

Hello All.

I have a Navigationcontroller pushing a UIViewController with a scrollview inside. Within the scrollview I download a certain number of images around 20 (sometimes more) each sized around 150 KB.

All these images are added to the scrollview so that their origin is x +imageSize and the following is sorted right to the one before.

All in all I think its a lot of data (3-4 MB).
On an I pod Touch this sometimes crashes, the IPhone can handle it once, if it has to load the data again (some other images) , it crashes too.

I guess its a memory issue but within my code, I download the image, save it to a file on the phone as NSData, read it again from file and add it to a UIImageview which I release. So I have freed the memory I allocated, nevertheless it still crashes.

Can anyone help me out? Since Im new to this, I dont know the best way to handle the Images in a scrollview.

Besides I create the controller at start from nib, which means I dont have to release it, since I dont use alloc - right?

Code:

In my rootviewcontrller I do:

-(void) showImages {

	

	[[self naviController] pushViewController:imagesViewController animated:YES];
	[imagesViewController viewWillAppear:YES];
	 
	
}


- (void) loadOldImageData {

	
	for (int i = 0; i < 40 ; i++) {
		
		
		NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
		NSString *documentsDirectory = [paths objectAtIndex:0];
		NSString *filePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"img%d.jpg", i]];
		
		
		
		
		
		NSData *myImg = [NSData dataWithContentsOfFile:filePath];
		UIImage *im = [UIImage imageWithData:myImg];
		
		
		if([im isKindOfClass:[UIImage class]]) {
			NSLog(@"IM EXISTS");
			
			UIImageView *imgView = [[UIImageView alloc] initWithImage:im];
			
			
			CGRect frame = CGRectMake(i*320, 0, 320, 416);
			imgView.frame = frame;
			
			[myScrollView addSubview:imgView];
			[imgView release];
		
			
			
			//NSLog(@"Adding img %d", i);
			numberImages = i;
			NSLog(@"setting numberofimages to %d", numberImages);
			//NSLog(@"scroll subviews %d", [myScrollView.subviews count]);

		}
		
	}
	
	
	myScrollView.contentSize = CGSizeMake(320 * (numberImages + 1), 416);
	
	
}