Swift 在iOS 13上将自定义字体设置为tabbar

在iOS 13上，uitabaritem.appearance（）.setTitleTextAttributes方法有一个bug，但如果我在属性中使用自定义字体，则也有

tabBar.standardAppearance=appearance

的bug，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
}

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如果我只在iOS 13上设置了外观tabBar.standardAppearance=外观，我仍然会有字体错误。

请检查我对类似问题的回答