IOS-设置NavigationBar的背景及字体颜色

    //修改整体的navigationBar的背景颜色
    [[UINavigationBar appearance] setBarTintColor:[UIColor colorWithRed:46/255.0 green:186/255.0 blue:157/255.0 alpha:1.0]];
    //修改整体的navigationBar的字体颜色为白色
    NSDictionary * dict=[NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:NSForegroundColorAttributeName];
    [[UINavigationBar appearance] setTitleTextAttributes:dict];
    [[UINavigationBar appearance] setTintColor:[UIColor redColor]];