Question

我希望能够设置我的应用程序导航栏后退按钮的字体，而不会做任何太疯狂的事情而不会丢失按钮的任何其他设计特征（即我想保留箭头）。

现在我在viewDidAppear:中使用它来设置普通条形按钮项的字体。

for (NSObject *view in self.navigationController.navigationBar.subviews) {
    if ([view isKindOfClass:[UIButton class]]) {
        [((UIButton*)view).titleLabel setFont:[UIFont 
                                 fontWithName:@"Gill Sans" 
                                         size:14.0]];
    }
}

然而，无论后面的按钮是什么UIViewController（root，current等），这都不会对后退按钮进行任何更改。

Answer 1

要更改所有UIBarButtonItems中显示的所有UINavigationBars中文字的外观，请在application:didFinishLaunchingWithOptions:

中执行以下操作

[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil] setTitleTextAttributes:
    @{UITextAttributeTextColor:[UIColor blackColor],
     UITextAttributeTextShadowOffset:[NSValue valueWithUIOffset:UIOffsetMake(0, 1)],
     UITextAttributeTextShadowColor:[UIColor whiteColor],
     UITextAttributeFont:[UIFont boldSystemFontOfSize:12.0]
    }
     forState:UIControlStateNormal];

更新：iOS7友好版

NSShadow *shadow = [[NSShadow alloc] init];
shadow.shadowOffset = CGSizeMake(0.0, 1.0);
shadow.shadowColor = [UIColor whiteColor];

[[UIBarButtonItem appearanceWhenContainedIn:[UINavigationBar class], nil]
 setTitleTextAttributes:
 @{NSForegroundColorAttributeName:[UIColor blackColor],
   NSShadowAttributeName:shadow,
   NSFontAttributeName:[UIFont boldSystemFontOfSize:12.0]
   }
 forState:UIControlStateNormal];

斯威夫特：

注意：这会更改UIBarButtonItem的所有实例，而不仅仅是UINavigationBar

中包含的实例

UIBarButtonItem.appearance()
               .setTitleTextAttributes([NSFontAttributeName : ExamplesDefaults.fontWithSize(22)], 
                                       forState: UIControlState.Normal)

Swift3：

UIBarButtonItem.appearance()
     .setTitleTextAttributes([NSFontAttributeName: UIFont(name: "FontName-Regular", size: 14.0)!], 
                             for: .normal)

Answer 2

对于那些没有完全解决这个问题的人来说，我就是这样做的，包括弹回到IOS7中的Root ViewController：

UIBarButtonItem *backBtn =[[UIBarButtonItem alloc]initWithTitle:@"Back" style:UIBarButtonItemStyleDone target:self action:@selector(popToRoot:)];
backBtn.title = @"Back";
[backBtn setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                 [UIFont fontWithName:@"Chalkduster" size:15], NSFontAttributeName,
                                 [UIColor yellowColor], NSForegroundColorAttributeName,
                                 nil]
                       forState:UIControlStateNormal];

self.navigationItem.leftBarButtonItem=backBtn;

popToRoot ViewController：

- (IBAction)popToRoot:(UIBarButtonItem*)sender {
[self.navigationController popToRootViewControllerAnimated:YES];
}

也许某人可能会使用此功能。

Answer 3

上面提到的所有Swift版本（摘自original answer）：

let customFont = UIFont(name: "customFontName", size: 17.0)!
UIBarButtonItem.appearance().setTitleTextAttributes([NSFontAttributeName: customFont], forState: .normal)

更多好处：
https://stackoverflow.com/a/28347428/469614

Answer 4

在Swift3中：

{

    "manifest_version": 2,
    "name": "My extension",
    "version": "1.0",

    "description": "Retrieve local data.",
    "homepage_url": "http://Nonefornow",
    "icons": {
        "48": "icons/beautiful-icon.png"
    },

    "permissions": [
        "activeTab"
    ],

    "browser_action": {
        "browser_style": true,
        "default_icon": "icons/icon.png",
        "default_title": "My Ext",
        "default_popup": "popup.html"
    }

}

注意：您只需为导航控制器执行一次此操作。

Answer 5

Swift 3.0 +

<强> AppDelegate.swift

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedStringKey.font: UIFont(name: "myFont", size: 17.0)!], for: .normal)

Answer 6

在AppDelegate或初始化NavigationController的地方使用此功能，iOS 5及以上版本中可用的方法

UIBarButtonItem *backbutton =  [[UIBarButtonItem alloc] initWithTitle:@"back" style:UIBarButtonItemStyleBordered target:nil action:nil];  
[backbutton setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                                   [UIColor blackColor],UITextAttributeTextColor,[UIFont fontWithName:TEXTFONT size:16.0f],UITextAttributeFont,
                                                   nil] forState:UIControlStateNormal];

Answer 7

如果您在iOS 8中使用新的UISplitViewControllerDelegate分割视图，则上述方法无法正常工作，因为新displayModeButtonItem的工作方式略有不同。

您需要在创建displayModeButtonItem时设置字体。假设您正在关注Apple的模板，可能会在prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender中执行以下操作：

// From Apple's Template:
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
NSManagedObject *object = [[self fetchedResultsController] objectAtIndexPath:indexPath];
DetailViewController *controller = (DetailViewController *)[[segue destinationViewController] topViewController];
[controller setDetailItem:object];
controller.navigationItem.leftBarButtonItem = self.splitViewController.displayModeButtonItem;
controller.navigationItem.leftItemsSupplementBackButton = YES;
// New Line to set the font:
[controller.navigationItem.leftBarButtonItem setTitleTextAttributes:@{NSFontAttributeName : [UIFont fontWithName:@"SourceSansPro-Regular" size:14]} forState:UIControlStateNormal];

Answer 8

如果您需要更改标题，请使用：

 UINavigationBar.appearance().titleTextAttributes = [
        NSAttributedString.Key.font: UIFont.systemFont(ofSize: 20, weight: UIFont.Weight.heavy)
    ]

但如果您的 BarButtonItems 需要它，您可以使用以下内容：

UIBarButtonItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont.boldSystemFont(ofSize: 17.0)], for: .normal)

<块引用>

注意：这些行将添加到 AppDelegate.Swift 文件

更改后导航栏按钮的字体

8 个答案: