iPadOS 15 UITabBar 标题被截断

Question

自从我升级了我的 iPad 操作系统后，我的应用程序的 UITabBar 的标题显示被截断，如屏幕截图所示。

我尝试了一些方法，但没有找到正确的解决方法。

希望有人能帮助我。

这是代码：

func setupTabBar() {
    if #available(iOS 13, *) {
        let appearance = tabBar.standardAppearance
        appearance.configureWithOpaqueBackground()
        appearance.backgroundImage = UIImage(color: .white)
        appearance.shadowImage = UIImage(color: .clear)
        let normalAttrs: [NSAttributedString.Key: Any] = [.foregroundColor: ThemeColor.gray]
        let selectedAttrs: [NSAttributedString.Key: Any] = [.foregroundColor: ThemeColor.red]
        appearance.stackedLayoutAppearance.selected.titleTextAttributes = selectedAttrs
        appearance.stackedLayoutAppearance.normal.titleTextAttributes = normalAttrs
        appearance.inlineLayoutAppearance.selected.titleTextAttributes = selectedAttrs
        appearance.inlineLayoutAppearance.normal.titleTextAttributes = normalAttrs
        appearance.compactInlineLayoutAppearance.selected.titleTextAttributes = selectedAttrs
        appearance.compactInlineLayoutAppearance.normal.titleTextAttributes = normalAttrs
        UITabBar.appearance().standardAppearance = appearance
    } else {
        tabBar.backgroundImage = UIImage(color: .white)
        tabBar.shadowImage = UIImage(color: .clear)
    }

    if #available(iOS 15, *) {
        UITabBar.appearance().scrollEdgeAppearance = UITabBar.appearance().standardAppearance
    }
}

Answer 1

出于某种原因，设置 titleTextAttributes 似乎是导致 inlineLayoutAppearance 出现问题的原因，包括 NSParagraphStyle.default 的默认段落样式可以解决此问题。

对于您的代码，以下更改应该可以修复它（从 iOS 15.0 开始）。

let normalAttrs: [NSAttributedString.Key: Any] = [.foregroundColor: ThemeColor.gray, .paragraphStyle: NSParagraphStyle.default]
let selectedAttrs: [NSAttributedString.Key: Any] = [.foregroundColor: ThemeColor.red, .paragraphStyle: NSParagraphStyle.default]

Answer 2

对于那些不能有默认段落样式的人，为大多数州设置属性得到 OS 为我正确调整标签大小。

Swift 5.0:

    UITabBarItem.appearance()
        .setTitleTextAttributes(
            customAttributesWithCustomParagraphStyle,
            for: [
                .normal,
                .highlighted,
                .disabled,
                .selected,
                .focused,
                .application,
            ]
        )

如果不设置至少 .normal 和 .selected，UITabBarItem 标题在与自定义属性一起使用时会被截断。

iPadOS 15 UITabBar 标题被截断

iPadOS 15 UITabBar title cut off

ios

ipados