UINavigationcontroller的背景图片

Question

我想将背景图片添加到uinavigationcontroller。请帮帮我。

Answer 1

试试这个

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

Answer 2

使用此

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [self.window makeKeyAndVisible];
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"yourImage"] forBarMetrics:UIBarMetricsDefault];
    return YES;
}

Answer 3

swift 3和swift 4上的代码

UINavigationBar.appearance().setBackgroundImage(UIImage(named:"pattern.png"),
                                                            for: .default)

Answer 4

如果要从ViewController更改导航栏图像

1. 目标C

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

2. 快速

   self.navigationController?.navigationBar.setBackgroundImage(UIImage(named:"pi2"), for: .default)
   

如果要从Appdelegate更改导航栏图像

 1. Using Objective C

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
            [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"img"] forBarMetrics:UIBarMetricsDefault];
            return YES;
        }

 2. Using swift  


func application(_ application: UIApplication, didFinishLaunchingWithOptions 
                              launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool  {
                         UINavigationBar.appearance().setBackgroundImage(UIImage(named:"img"), for:.default)
                         return true
       }