ios - 设置 UIBarButtonItem.appearance() 在 iOS 15 上不起作用

Question

如何在 UINavigationBar

上设置全局外观 UIBarButtonItem

UIBarButtonItem.appearance() 不适用于 iOS 15

let BarButtonItemAppearance = UIBarButtonItem.appearance()
let attributes = [NSAttributedString.Key.font : UIFont(name:"Futura-Medium", size: 14) as Any]
BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .normal)                
BarButtonItemAppearance.setTitleTextAttributes(attributes, for: .highlighted)

Answer 1

在 iOS 15 上，您似乎必须改用 UINavigationBarAppearance 对象(在我看来，这远非整体改进)

if #available(iOS 15.0, *) {
    let navigationAppearance = UINavigationBarAppearance()
    navigationAppearance.configureWithDefaultBackground()
    let buttonAppearance = UIBarButtonItemAppearance()
    buttonAppearance.normal.titleTextAttributes = attributes
    buttonAppearance.highlighted.titleTextAttributes = attributes
    navigationAppearance.buttonAppearance = buttonAppearance

    let appearance = UINavigationBar.appearance()
    appearance.standardAppearance = navigationAppearance
    appearance.scrollEdgeAppearance = navigationAppearance
} else {
    let appearance = UIBarButtonItem.appearance()
    appearance.setTitleTextAttributes(attributes, for: .normal)
    appearance.setTitleTextAttributes(attributes, for: .highlighted)
}