【代碼筆記】自定義導航條顏色

一，效果圖。

二，工程圖。

三，代碼。

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    
    RootViewController *rootVC=[[RootViewController alloc]init];
    UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:rootVC];
    
   // UIBarMetricsDefault:用豎著（拿手機）時UINavigationBar的標準的尺寸來顯示UINavigationBar.
    //UIBarMetricsLandscapePhone:用橫著時UINavigationBar的標準尺寸來顯示UINavigationBar
    [nav.navigationBar setBackgroundImage:[UIImage imageNamed:@"1.jpg"] forBarMetrics:UIBarMetricsDefault];
    
    self.window.rootViewController=nav;
    
    
    
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}