ios - 如何在 UINavigationBar 上设置图像

Question

设置 navigationController 一个大小为 750 × 90 Image Size 的图像

[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"bg.png"] forBarMetrics:UIBarMetricsDefault];

在将图像设置为导航 Controller 后，它没有在 UINavigationController 上完全绘制图像。

如何在 UINavigationController 栏上设置图像。

Answer 1

试试这个

use the method of resizableImageWithCapInsets:resizingMode: and set the resizingMode to UIImageResizingModeStretch, else the image would still Same in the navigation bar.

UIImage *currentImgae =  [[UIImage imageNamed:@"bg.png"]
                                     resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0) resizingMode:UIImageResizingModeStretch];

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

swift

let currentImgae = UIImage(named: "bg.png")!.resizableImageWithCapInsets(UIEdgeInsetsMake(0, 0, 0, 0), resizingMode: .Stretch)
self.navigationController.navigationBar.setBackgroundImage(currentImgae!, forBarMetrics: .Default)