在iOS5或者以上修改Navigation bar的颜色

在AppDelegate.m里面的didFinishLaunchingWithOptions:方法加入以下的语句。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    // Override point for customization after application launch.    [[UINavigationBar appearance] setTintColor:[UIColor blueColor]];    return YES;}