AVMakeRectWithAspectRatioInsideRect returns the correct image but an incorrect size

I am new to iOS Swift development but even newer to manipulating images. I have a UIImageView inside of a UIScrollView. I want a user to zoom/pan to show the exact image they want to capture. I have this working to an extent. When the user clicks a button, it does properly capture the image and exactly what was in the UIScrollView box, however, the SIZE of the image is not correct. Any help would be appreciated!!

@IBAction func tapSendtoBand(sender: UIButton) {

    var frameInfo = frameForImage(photoImageView.image!, imageView: photoImageView)
    var imageWidth = photoImageView.image!.size.height
    var scale:CGFloat = CGFloat(1.0) / (photoImageView.frame.size.height / imageWidth)

    var visibleRect = CGRect()
    var pWidth  = CGFloat(CGImageGetWidth(photoImageView.image?.CGImage))
    var pHeight = CGFloat(CGImageGetHeight(photoImageView.image?.CGImage))

    visibleRect.origin = scrollView.contentOffset
    visibleRect.size = scrollView.bounds.size
    visibleRect.origin.x *= scale
    visibleRect.origin.y *= scale
    visibleRect.size.width *= scale
    visibleRect.size.height *= scale

    var pSize:CGSize = CGSize(width: visibleRect.size.width,height: visibleRect.size.height)

    let bRect = AVMakeRectWithAspectRatioInsideRect(pSize, visibleRect)

    UIImageWriteToSavedPhotosAlbum(cropImage(photoImageView.image!, rect: bRect), nil, nil, nil)

    photoTest.image = cropImage(photoImageView.image!, rect: bRect)

}

Here is the frame function I am using to try to determine the sizing

func frameForImage (image:UIImage, imageView:UIImageView) -> CGRect{

        var imageRatio = image.size.width / image.size.height;
        var viewRatio = imageView.frame.size.width / imageView.frame.size.height;

        if(imageRatio < viewRatio){

            var scale = imageView.frame.size.height / image.size.height;

            var width = scale * image.size.width;

            var topLeftX = (imageView.frame.size.width - width) * 0.5;
            return CGRectMake(topLeftX, 0, width, imageView.frame.size.height)
        }
        else{
            var scale = imageView.frame.size.width / image.size.width;
            var height = scale * image.size.height;
            var topLeftY = (imageView.frame.size.height - height) * 0.5;

            return CGRectMake(0, topLeftY, imageView.frame.size.width, height);
        }
    }

Here is the function that I use to actually crop the image

func cropImage(srcImage:UIImage,rect:CGRect) -> UIImage
{
    var cgImageConv = srcImage.CGImage
    var cgSizeConv:CGSize = CGSize(width: 310,height: 102)
    var cr:CGImageRef = CGImageCreateWithImageInRect(cgImageConv, rect)
    var cropped:UIImage = UIImage(CGImage: cr)!

    return cropped
}

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The code below sets the mode for your image view to aspect ratio and to fill area of screen.

//Makes your image view fill the real estate you have available on your phones screen
yourUIImageView.autoresizingMask = UIViewAutoresizing.FlexibleBottomMargin | UIViewAutoresizing.FlexibleHeight | UIViewAutoresizing.FlexibleRightMargin | UIViewAutoresizing.FlexibleLeftMargin | UIViewAutoresizing.FlexibleTopMargin | UIViewAutoresizing.FlexibleWidth

//Will make your image view Aspect ratio
yourUIImageView.contentMode = UIViewContentMode.ScaleAspectFit