How to get the Size (KB) of UIImage

Question

I am getting Image from didFinishPickingMediaWithInfo.

UIImage *originalImage = (UIImage*)[info valueForKey:UIImagePickerControllerOriginalImage];
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Answer 1

I think the op's size (kb) is the memory size of originalImage, right?

Check out the usage about malloc_size under the ARC refer to this.

#import 

NSLog(@"Size of %@: %zd", NSStringFromClass([originalImage class]), malloc_size((__bridge const void *)originalImage));