swift - 在 iOS 13 上为选项卡栏设置自定义字体

Question

在 iOS 13 上，UITabBarItem.appearance().setTitleTextAttributes 方法存在错误，但如果我在属性中使用自定义字体，tabBar.standardAppearance =appearance 也存在错误

Answer 1

我找到了使用此解决方法修复它的方法:

let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.alignment = .center
let attributes = [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 12),
                  NSAttributedString.Key.paragraphStyle: paragraphStyle]

let appearance = UITabBarItem.appearance()
appearance.setTitleTextAttributes(attributes, for: .normal)

if #available(iOS 13.0, *) {
    let appearance = UITabBarAppearance()
    appearance.stackedLayoutAppearance.normal.titleTextAttributes = attributes
    appearance.stackedLayoutAppearance.normal.badgeBackgroundColor = .blue
    appearance.stackedLayoutAppearance.selected.titleTextAttributes = attributes
    appearance.stackedLayoutAppearance.selected.badgeBackgroundColor = .blue
    tabBar.standardAppearance = appearance
}

如果我只在 iOS 13 上设置外观 tabBar.standardAppearance = 外观，我仍然会遇到字体错误。