这是一个相当老的线程，但我认为提供的答案设置的颜色，大小和垂直位置的导航栏标题iOS 7及以上

颜色和尺寸

 NSDictionary *titleAttributes =@{
                                NSFontAttributeName :[UIFont fontWithName:@"Helvetica-Bold" size:14.0],
                                NSForegroundColorAttributeName : [UIColor whiteColor]
                                };

垂直位置

[[UINavigationBar appearance] setTitleVerticalPositionAdjustment:-10.0 forBarMetrics:UIBarMetricsDefault];

设置Title并分配属性字典

[[self navigationItem] setTitle:@"CLUBHOUSE"];
self.navigationController.navigationBar.titleTextAttributes = titleAttributes;

像这样使用定向支持

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,40)];
[view setBackgroundColor:[UIColor clearColor]];
[view setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight ];

UILabel *nameLabel = [[UILabel alloc] init];
[nameLabel setFrame:CGRectMake(0, 0, 320, 40)];
[nameLabel setBackgroundColor:[UIColor clearColor]];
[nameLabel setAutoresizingMask:UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin |UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleLeftMargin];
[nameLabel setTextColor:[UIColor whiteColor]];
[nameLabel setFont:[UIFont boldSystemFontOfSize:17]];
[nameLabel setText:titleString];
[nameLabel setTextAlignment:UITextAlignmentCenter];
[view addSubview:nameLabel];
[nameLabel release];
self.navigationItem.titleView = view;
[view release];

从ios5开始，我们必须使用titleTextAttribute字典(UInavigation控制器类引用中的预定义字典)设置标题文本的颜色和导航栏的字体。

 [[UINavigationBar appearance] setTitleTextAttributes:
 [NSDictionary dictionaryWithObjectsAndKeys:
  [UIColor blackColor],UITextAttributeTextColor, 
[UIFont fontWithName:@"ArialMT" size:16.0], UITextAttributeFont,nil]];

亚历克斯·R·R的最新消息。的帖子使用新的iOS 7文本属性和现代objective c减少噪音:

NSShadow *titleShadow = [[NSShadow alloc] init];
titleShadow.shadowColor = [UIColor blackColor];
titleShadow.shadowOffset = CGSizeMake(-1, 0);
NSDictionary *navbarTitleTextAttributes = @{NSForegroundColorAttributeName:[UIColor whiteColor],
                                            NSShadowAttributeName:titleShadow};

[[UINavigationBar appearance] setTitleTextAttributes:navbarTitleTextAttributes];

Swift 4和4.2版本:

 self.navigationController.navigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.green]

我相信设置UINavigationBar颜色的正确方法是:

NSDictionary *attributes=[NSDictionary dictionaryWithObjectsAndKeys:[UIColor redColor],UITextAttributeTextColor, nil];
self.titleTextAttributes = attributes;

上面写的代码是UINavigationBar上的子类，显然没有子类也可以工作。