无法正确设置导航栏背景图片

Question

I have a view, and inside this view I have a table view.

I want to change this table view navigation bar image to some image.

So I added a navigation bar object in the interface builder and put it on the table view > I control dragged from this object to the table view controller > then in the viewDidLoad I adder the line: [self.navBar setBackgroundImage:[UIImage imageNamed:@"nav.png"] forBarMetrics:UIBarMetricsDefault];

With navBar is the outlet to the navigation bar.

Why this does not work?

tnx

Answer 1

尝试在AppDelegate中添加以下代码

[[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"nav.png"] forBarMetrics:UIBarMetricsDefault];

Answer 2

Ideally, Navigation Bar should display the background image with the method you used until and unless the project resources contain the image and Navigation Bar is referenced properly.

Anyways, you can embed the View in Navigation Controller 1. Select ViewController in Storyboard 2. Go to Editor -> Embed in -> Navigation Controller and use the following code in viewDidAppear-

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