Compressing Photos/UIImage maintaining Aspect Ratio in iPhone App

Normally, the pictures taken from iPhone camera are high resolutions and it ranges from 1-4 MB in size. When our app needs to send these size of images to the server, upload may take long time which  breaks down the overall app's performance. So in this section, I am sharing a short and sweat objective-c method which will compress original image in iPhone , makes image size small and also the aspect ratio is maintained.
As for my test, 2048*1536 (930 kb) size image  is compressed to 600*450 (169 kb) image and 2448*3264 (2.5 mb) size image is compressed to 600*800 (230 kb) image using the following objective-c method:

- (UIImage *)compressImage:(UIImage *)image {
    float actualHeight = image.size.height;
    float actualWidth = image.size.width;
    float maxHeight = 800.0; //new max. height for image
    float maxWidth = 600.0; //new max. width for image
    float imgRatio = actualWidth/actualHeight;
    float maxRatio = maxWidth/maxHeight;
    float compressionQuality = 0.5; //50 percent compression
   
    if (actualHeight > maxHeight || actualWidth > maxWidth){
        if(imgRatio < maxRatio){
            //adjust width according to maxHeight
            imgRatio = maxHeight / actualHeight;
            actualWidth = imgRatio * actualWidth;
            actualHeight = maxHeight;
        }
        else if(imgRatio > maxRatio){
            //adjust height according to maxWidth
            imgRatio = maxWidth / actualWidth;
            actualHeight = imgRatio * actualHeight;
            actualWidth = maxWidth;
        }
        else{
            actualHeight = maxHeight;
            actualWidth = maxWidth;
        }
    }
    NSLog(@"Actual height : %f and Width : %f",actualHeight,actualWidth);
    CGRect rect = CGRectMake(0.0, 0.0, actualWidth, actualHeight);
    UIGraphicsBeginImageContext(rect.size);
    [image drawInRect:rect];
    UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
    NSData *imageData = UIImageJPEGRepresentation(img, compressionQuality);
    UIGraphicsEndImageContext();
   
    return [UIImage imageWithData:imageData];
}
* depending on your compressionQuality , the image size and quality varies, and its value ranger from 0 to 1.