iphone - Get size of a UIImage (bytes length) not height and width

Question

I'm trying to get the length of a UIImage. Not the width or height of the image, but the size of the data.

Answer 1

 UIImage *img = [UIImage imageNamed:@"sample.png"];
 NSData *imgData = UIImageJPEGRepresentation(img, 1.0); 
 NSLog(@"Size of Image(bytes):%d",[imgData length]);