How to get the compressed file size of an image received from `UIImagePickerController`?

Question

I want to know the size of image taken by UIImagePickerController by camara or library. Is there any way to find that ?

Requirement is like,

If

Answer 1

May this code work for you. It is not giving you image in size like bytes or mb. But this code give you image according to Your custom size like 100x200.

@implementation UIImage (CS_Extensions)
    - (UIImage *)imageByScalingProportionallyToSize:(CGSize)targetSize {

        UIImage *sourceImage = self;
        UIImage *newImage = nil;

        CGSize imageSize = sourceImage.size;
        CGFloat width = imageSize.width;
        CGFloat height = imageSize.height;

        CGFloat targetWidth = targetSize.width;
        CGFloat targetHeight = targetSize.height;

        CGFloat scaleFactor = 0.0;
        CGFloat scaledWidth = targetWidth;
        CGFloat scaledHeight = targetHeight;

        CGPoint thumbnailPoint = CGPointMake(0.0,0.0);

        if (CGSizeEqualToSize(imageSize, targetSize) == NO) {

            CGFloat widthFactor = targetWidth / width;
            CGFloat heightFactor = targetHeight / height;

            if (widthFactor < heightFactor)
                scaleFactor = widthFactor;
            else
                scaleFactor = heightFactor;

            scaledWidth  = width * scaleFactor;
            scaledHeight = height * scaleFactor;

            // center the image

            if (widthFactor < heightFactor) {
                thumbnailPoint.y = (targetHeight - scaledHeight) * 0.5;
            } else if (widthFactor > heightFactor) {
                thumbnailPoint.x = (targetWidth - scaledWidth) * 0.5;
            }
        }


        // this is actually the interesting part:

        UIGraphicsBeginImageContext(targetSize);

        CGRect thumbnailRect = CGRectZero;
        thumbnailRect.origin = thumbnailPoint;
        thumbnailRect.size.width  = scaledWidth;
        thumbnailRect.size.height = scaledHeight;

        [sourceImage drawInRect:thumbnailRect];

        newImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        if(newImage == nil) NSLog(@"could not scale image");


        return newImage ;
    }
    @end