@implementation ZBMainViewController

- (void)viewDidLoad {

    [super viewDidLoad];

}

+(void)initialize

{

    [self setupBarButtonItemTheme];

    [self setupNavigationBarTheme];

}

+(void)setupBarButtonItemTheme{

    UIBarButtonItem *appearance=[UIBarButtonItem appearance];

    NSMutableDictionary *dict=[NSMutableDictionary dictionary];

    dict[NSFontAttributeName]=[UIFont systemFontOfSize:15];

   dict[NSForegroundColorAttributeName]=[UIColor greenColor];

    NSShadow *shadow=[[NSShadow alloc] init];

    shadow.shadowColor=[UIColor blueColor];

    shadow.shadowOffset=CGSizeMake(1, 1);

    dict[NSShadowAttributeName]=shadow;

    [appearance setTitleTextAttributes:dict forState:UIControlStateNormal];

}

+(void)setupNavigationBarTheme{

    UINavigationBar *apperarance=[UINavigationBar appearance];

    [apperarance setBackgroundImage:[UIImage imageNamed:@"bar_background"] forBarMetrics:UIBarMetricsDefault];

    NSMutableDictionary *dict=[NSMutableDictionary dictionary];

    dict[NSFontAttributeName]=[UIFont systemFontOfSize:18];

    dict[NSForegroundColorAttributeName]=[UIColor redColor];

   NSShadow *shadow= [[NSShadow alloc]init];

    shadow.shadowColor=[UIColor grayColor];

    shadow.shadowOffset=CGSizeMake(1, 1);

    dict[NSShadowAttributeName]=shadow;

    [apperarance setTitleTextAttributes:dict];

}

IOS 自定义全局navigaitonbar 属性样式