aspectToFit, how to get image size?

It is necessary to calculate it from the sizes of UIImage and UIImageView :

 @IBOutlet var ivToGetSize: UIImageView! //UIImageView с искомой картинкой //по нажатию на кнопку определяем размер картинки @IBAction func btnClick(sender: UIButton) { let image = ivToGetSize.image if let im = image { let displayedSize = getDisplayedSize(im.size, imageViewBoundsSize: ivToGetSize.bounds.size) let imWidth = displayedSize.width let imHeight = displayedSize.height print("\(imWidth) \(imHeight)") //выводим полученные ширину и высоту картинки } } //функция для определения размера func getDisplayedSize(imageSize: CGSize, imageViewBoundsSize: CGSize) -> CGSize { var imageDisplayedSize = CGSizeMake(imageViewBoundsSize.width, imageViewBoundsSize.height); let mW = imageViewBoundsSize.width / imageSize.width; let mH = imageViewBoundsSize.height / imageSize.height; if( mH < mW ) { imageDisplayedSize.width = mH * imageSize.width; } else if( mW < mH ) { imageDisplayedSize.height = mW * imageSize.height; } return imageDisplayedSize; }