应用CGAffineTransform后，从imageview获取新的图像大小

I'm using UIGestureRecognizers to rotate and resize an image using uiimageview. Now problem is that I need to get the new size of the image from UIImageView transform (which is CGAffineTransform) property. I found this code at StackOverFlow, but it is not returning proper values. As imageview is not only resized but also rotated. So my question is how to get the new size and location from the rotated and resized UIImageView's transform property?I'm using UIGestureRecognizers to rotate and re