I am new to iphone development and thought that your code might help me but I am having difficulty using it.

Background: I am using imagePickerController to select an image which I then pass to my bilinear scale routine, create a new UIImage. This Image is used as my background in a UIView which the user can draw lines on. As such I redraw the Image every time the user draws a line. The problem I am having is that the UImage that I create does not retain the data and crashes the program.

So I thought your code would fit into my project perfectly but I am not sure what I am supposed to put in for myManagedObject, xcode is telling that it is undeclared.

Any help would be appreciated. Thanks John

http://code.google.com/p/google-toolbox-for-mac/

They have a lot of sample code that will compile for either platform.

ifdef IPHONEOS_DEPLOYMENT_TARGET

typedef UIImage MYImage;

else

typedef NSImage MYImage;

NSData * UIImagePNGRepresentation(MYImage *image){ NSBitmapImageRep *bits = [[image representations] objectAtIndex: 0];

return [bits representationUsingType:NSPNGFileType properties:nil];

}

endif

@implementation MyEntityWithAnImage

• (void)setImage:(MYImage*)image { [self willChangeValueForKey:@"image"];

  NSData *data = UIImagePNGRepresentation(image);

  [myManagedObject setImage:data]; [self setPrimitiveValue:data forKey:@"image"]; [self didChangeValueForKey:@"image"]; }

• (MYImage*)image { [self willAccessValueForKey:@"image"]; MYImage *image = [[MYImage alloc] initWithData:[self primitiveValueForKey:@"image"]]; [self didAccessValueForKey:@"image"]; return image; }

@end

It’s easier to manage the code this way.

Having said that, I can’t think of much benefit doing it that way and ironically I suspect you would have to write more code than using PNG.