Cropping center square of UIImage

Question

So here\'s where I\'ve made it so far. I am using a UIImage captured from the camera and can crop the center square when in landscape. For some reason this doesn\'t transl

Answer 1

Solution based on Swift 2 extension. Improvised from @Geoffrey and @Nirav Dangi. Note that we set newCropWidth and newCropHeight to image's width or height when they are lesser than the given width or height.

extension UIImage {
    func imageByCroppingImage(size: CGSize) -> UIImage {
        let newCropWidth, newCropHeight : CGFloat;

        if(self.size.width < self.size.height) {
            if (self.size.width < size.width) {
                newCropWidth = self.size.width;
            }
            else {
                newCropWidth = size.width;
            }
            newCropHeight = (newCropWidth * size.height)/size.width;
        } else {
            if (self.size.height < size.height) {
                newCropHeight = self.size.height;
            }
            else {
                newCropHeight = size.height;
            }
            newCropWidth = (newCropHeight * size.width)/size.height;
        }

        let x = self.size.width / 2 - newCropWidth / 2;
        let y = self.size.height / 2 - newCropHeight / 2;

        let cropRect = CGRectMake(x, y, newCropWidth, newCropHeight);
        let imageRef = CGImageCreateWithImageInRect(self.CGImage, cropRect);

        let croppedImage : UIImage = UIImage(CGImage: imageRef!, scale: 0, orientation: self.imageOrientation);

        return croppedImage;
    }
}