修改UINavigationController，UINavigationBar背景颜色，字体颜色

- (void)setNav

{

    UINavigationBar *bar = [UINavigationBarappearance];

    //设置显示的颜色

    bar.barTintColor = [UIColorcolorWithRed:62/255.0green:173/255.0blue:176/255.0alpha:1.0];

    //设置字体颜色

    bar.tintColor = [UIColorwhiteColor];

    [bar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColorwhiteColor]}];

//或者用这个都行

//    [bar setTitleTextAttributes:@{UITextAttributeTextColor : [UIColorwhiteColor]}];

}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

//*********

[self setNav];//修改程序中所有的显示的navigationbar的颜色，字体

//********

}

如图