navigationBar顯示圖片不全，按比例顯示圖片

 

oc：

    UIImage *image = [UIImage imageNamed:@"my_order_details_bg_top1"];

   image = [image resizableImageWithCapInsets:UIEdgeInsetsZero resizingMode:UIImageResizingModeStretch];

   [self.navigationController.navigationBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];

 

swift：

       var image = UIImage()
        image = UIImage.init(named: "NavigationBar")!
        //這句話按照比例延伸，顯示完整圖片
        image = image.resizableImage(withCapInsets: UIEdgeInsets.zero, resizingMode: UIImage.ResizingMode.stretch)
        navigationBar.setBackgroundImage(image, for: .default)