获取UIImageView上显示UIImage之后的实际大小

gistfile1.txt

CGRect rect = AVMakeRectWithAspectRatioInsideRect(self.imageView.image.size, self.imageView.frame);
if (!(isnan(rect.origin.x) || isnan(rect.origin.y) ||
        isnan(rect.size.width) || isnan(rect.size.height))) {
        self.imageView.frame = rect;
 }