How to get date and filesize from a picture?

Question

If pictures are loaded into an app from a album, how is it possible to get the filesize in MB and the date of that picture displayed on a app like on the screenshot below?

I know you can retrieve the filesize via a NSLog using the following code, but how can I get this into a string and also the date of that picture?

NSLog(@"size of image in KB: %i",[UIImagePNGRepresentation(UIImage) length]);

Answer 1

Use CoreGraphics

size_t imageSize = CGImageGetBytesPerRow(image.CGImage) * CGImageGetHeight(image.CGImage);

iOS get UIImage memory size