水平翻转
view.transform = CGAffineTransformScale(imageView.transform, -1.0, 1.0);
竖直翻转
view.transform = CGAffineTransformScale(imageView.transform, 1.0, -1.0);
水平翻转
view.transform = CGAffineTransformScale(imageView.transform, -1.0, 1.0);
竖直翻转
view.transform = CGAffineTransformScale(imageView.transform, 1.0, -1.0);