Swift3, ios 10

要全局分配颜色，在AppDelegate didFinishLaunchingWithOptions中:

let textAttributes = [NSForegroundColorAttributeName:UIColor.white]
UINavigationBar.appearance().titleTextAttributes = textAttributes

Swift 4, iOS 11

let textAttributes = [NSAttributedStringKey.foregroundColor:UIColor.white]
UINavigationBar.appearance().titleTextAttributes = textAttributes

从ios7开始，UINavigationBar的一些属性的行为发生了变化。你可以在下图中看到:

我想和大家分享两个美妙的链接。欲知更多详情，请浏览以下连结:

iOS 7用户界面过渡指南。 如何在iOS 7上更新你的应用。

barTintColor的苹果文档说:

默认情况下，此颜色为半透明，除非您设置 对NO的半透明性质。

示例代码:

self.navigationController.navigationBar.barTintColor = [UIColor blackColor];
self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
[self.navigationController.navigationBar 
 setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
self.navigationController.navigationBar.translucent = NO;

我认为前面的答案是正确的，这是做同样事情的另一种方式。我在这里与其他人分享，以防它对某人有用。这是如何在ios7中更改导航栏的文本/标题颜色:

UIColor *red = [UIColor colorWithRed:254.0f/255.0f green:0.0f/255.0f blue:0.0f/255.0f alpha:1.0];
NSMutableDictionary *navBarTextAttributes = [NSMutableDictionary dictionaryWithCapacity:1];
[navBarTextAttributes setObject:red forKey:NSForegroundColorAttributeName ];
self.navigationController.navigationBar.titleTextAttributes = navBarTextAttributes;

这个问题花了我半天的时间来解决，但这对我来说是有效的。 在初始化navigationController的rootViewController内部，我把下面的代码放在viewDidAppear方法中:

//set bar color
[self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:85.0/255.0 green:143.0/255.0 blue:220.0/255.0 alpha:1.0]];
//optional, i don't want my bar to be translucent
[self.navigationController.navigationBar setTranslucent:NO];
//set title and title color
[self.navigationItem setTitle:@"Title"];
[self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObject:[UIColor whiteColor] forKey:UITextAttributeTextColor]];
//set back button color
[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor], UITextAttributeTextColor,nil] forState:UIControlStateNormal];
//set back button arrow color
[self.navigationController.navigationBar setTintColor:[UIColor whiteColor]];

我在这里的完整帖子

范的回答对我很管用。下面是c#开发者使用Xamarin.iOS/MonoTouch的相同解决方案:

var navigationBar = NavigationController.NavigationBar; //or another reference
navigationBar.BarTintColor = UIColor.Blue;
navigationBar.TintColor = UIColor.White;
navigationBar.SetTitleTextAttributes(new UITextAttributes() { TextColor = UIColor.White });
navigationBar.Translucent = false;

[[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];