Question

嗨，我有这个代码而且它不起作用，我做错了什么？

- (void)viewDidLoad
{    
    [self.tabBarItem setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont fontWithName:@"AmericanTypewriter" size:20.0f], UITextAttributeFont, nil] forState:UIControlStateDisabled];
}

BTW，这不是我的viewDidLoad中唯一的东西，但我只是想告诉你那些我把它放在哪里。

Answer 1

根据：How to change the Color of text in UITabBarItem in iOS 5

看起来解决方案可能是将消息发送到外观代理，而不是一个项目：

（在iOS 7.0 +中不推荐使用）

[[UITabBarItem appearance] setTitleTextAttributes:@{UITextAttributeFont: [UIFont fontWithName:@"AmericanTypewriter" size:20.0f]} forState:UIControlStateNormal];

对于iOS 7.0+，请使用：

[[UITabBarItem appearance] setTitleTextAttributes:@{NSFontAttributeName: [UIFont fontWithName:@"AmericanTypewriter" size:20.0f]} forState:UIControlStateNormal];

Answer 2

快速的方式，对于懒惰：

UITabBarItem.appearance().setTitleTextAttributes([NSFontAttributeName: UIFont.systemFontOfSize(10)], forState: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSFontAttributeName: UIFont.systemFontOfSize(10)], forState: .selected)

Answer 3

Swift 3

UITabBarItem.appearance().setTitleTextAttributes([NSFontAttributeName: UIFont(name: "OpenSans", size: 10)!], for: .normal)

Answer 4

Swift 4.1和自定义字体

UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont(name: "Montserrat-Medium", size: 11)], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont(name: "Montserrat-Medium", size: 11)], for: .selected)

Answer 5

雨燕4

UITabBarItem.appearance().setTitleTextAttributes([NSAttributedString.Key.font: UIFont.tabbar], for: .normal)

Answer 6

如果我在 viewDidLoad() 中添加了代码，那么在选择标签栏时我永远无法更改字体。

这是一篇很棒的文章，详细解释了如何做到这一点：HolySwift Article

简而言之，您需要在标签栏控制器中添加以下代码：

override var selectedIndex: Int { 
    didSet {
        guard let selectedViewController = viewControllers?[selectedIndex] else {
            return
        }
        selectedViewController.tabBarItem.setTitleTextAttributes([.font: UIFont.boldSystemFont(ofSize: 13)], for: .normal) 
    }
}

还有这个：

override var selectedViewController: UIViewController? { 
    didSet {

        guard let viewControllers = viewControllers else {
            return
        }

        for viewController in viewControllers {
            if viewController == selectedViewController {
                viewController.tabBarItem.setTitleTextAttributes([.font: UIFont.boldSystemFont(ofSize: 13)], for: .normal)
            } else {
                viewController.tabBarItem.setTitleTextAttributes([.font: UIFont.systemFont(ofSize: 12)], for: .normal)
            }
        }
    }
}

PS：这也适用于自定义字体。

更改UITabBarItem中的字体

6 个答案: