How do I get `UIScreen.main.scale` after iOS 16

Question

UIScreen.main.scale will deprecated. here it the document in UIKit.UIScreen

    @available(iOS, introduced: 2.0, deprecated: 100000, message: "Use a UIScreen instance found through context instead: i.e, view.window.windowScene.screen")
    open class var main: UIScreen { get } // the device's internal screen

deprecated: 100000 means to be deprecated.

So my question is how do I replace this method?

use below method can work in main App, but UIApplication.shared doesn't available in extension app. Is there any solution to resolve this problem

@available(iOSApplicationExtension, unavailable)
extension UIWindow {
    static var current: UIWindow? {
        for scene in UIApplication.shared.connectedScenes {
            guard let windowScene = scene as? UIWindowScene else { continue }
            for window in windowScene.windows {
                if window.isKeyWindow { return window }
            }
        }
        return nil
    }
}

@available(iOSApplicationExtension, unavailable)
extension UIScreen {
    static var current: UIScreen? {
        UIWindow.current?.screen
    }
}

score 1 · Answer 1 · answered Jul 24 '23 at 07:04

1

extension UIViewController {
  func screen() -> UIScreen? {
    var parent = self.parent
    var lastParent = parent
    
    while parent != nil {
      lastParent = parent
      parent = parent!.parent
    }
    
    return lastParent?.view.window?.windowScene?.screen
  }
}

and use this extension in

  func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {

    let screen = windowScene.screen

check this link for reference Correct way to get the screen size on iOS, after UIScreen.main deprecation

answered Jul 24 '23 at 07:04

Chandaboy

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10

That's not what I want.in some cases. we don't have UIViewController in extension app – violethill Jul 24 '23 at 07:55
what do you mean by extension app?? – Chandaboy Jul 24 '23 at 08:11
extension app is not only widget extension. like `TVTopShelfContentProvider`, `NotificationService extension`, they don't have UIViewController – violethill Jul 26 '23 at 05:40

How do I get `UIScreen.main.scale` after iOS 16

1 Answers1