ios - 为什么不能更改 UITabBar 徽章字体 iOS Swift？

Question

我尝试像这样更改UITabBar 徽章字体：

cartTab = tabBar.items![2]
let font =  UIFont(name: "MyFontName", size: 11)!
cartTab?.setBadgeTextAttributes([NSAttributedStringKey.font.rawValue: font], for: .normal)
cartTab?.setBadgeTextAttributes([NSAttributedStringKey.font.rawValue: font], for: .selected). 

我在我的自定义标签栏控制器（viewDidLoad）中设置了这段代码。

标签： iosswiftuitabbarcontrolleruitabbarbadge

Answer 1

AppDelegate在（Swift 3）中试试这个

let font =  UIFont(name: "MyFontName", size: 11)!
UITabBarItem.appearance().setBadgeTextAttributes([NSFontAttributeName: font], for: .normal)
UITabBarItem.appearance().setBadgeTextAttributes([NSFontAttributeName: font], for: .selected)

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更新：

斯威夫特4

let font =  UIFont(name: "MyFontName", size: 11)!
UITabBarItem.appearance().setBadgeTextAttributes([NSAttributedString.Key.font: font], for: .normal)
UITabBarItem.appearance().setBadgeTextAttributes([NSAttributedString.Key.font: font], for: .selected)