How to use UIWindowScene.windows on iOS 15? [duplicate] - swift

Question

This question already has answers here:
How to resolve: 'keyWindow' was deprecated in iOS 13.0
(27 answers)
Closed 1 year ago.
Currently, with iOS 14.6, I can call a function in my app that displays a share sheet using the following code:
func share(link: URL) {
let activityView = UIActivityViewController(activityItems: [link], applicationActivities: nil)
UIApplication.shared.windows.first?.rootViewController?.present(activityView, animated: true, completion: nil)
}
Since iOS 15 beta, Xcode tells me "'windows' was deprecated in iOS 15.0: Use UIWindowScene.windows on a relevant window scene instead". How can I update this so that my share sheet will work properly in this new version? Thanks!

Answer 1

(Tested with iOS 15.2 running on Xcode 13.2.1)
Improving on Rachid's answer, here is a Swiftier version:
extension UIApplication {
var keyWindow: UIWindow? {
// Get connected scenes
return UIApplication.shared.connectedScenes
// Keep only active scenes, onscreen and visible to the user
.filter { $0.activationState == .foregroundActive }
// Keep only the first `UIWindowScene`
.first(where: { $0 is UIWindowScene })
// Get its associated windows
.flatMap({ $0 as? UIWindowScene })?.windows
// Finally, keep only the key window
.first(where: \.isKeyWindow)
}
}
If you want to find the presented UIViewController in the key UIWindow , here is another extension you could find useful:
extension UIApplication {
var keyWindowPresentedController: UIViewController? {
var viewController = self.keyWindow?.rootViewController
// If root `UIViewController` is a `UITabBarController`
if let presentedController = viewController as? UITabBarController {
// Move to selected `UIViewController`
viewController = presentedController.selectedViewController
}
// Go deeper to find the last presented `UIViewController`
while let presentedController = viewController?.presentedViewController {
// If root `UIViewController` is a `UITabBarController`
if let presentedController = presentedController as? UITabBarController {
// Move to selected `UIViewController`
viewController = presentedController.selectedViewController
} else {
// Otherwise, go deeper
viewController = presentedController
}
}
return viewController
}
}
You can put this wherever you want, but I personally added it as an extension to UIViewController.
This allows me to add more useful extensions, like ones to present UIViewControllers more easily for example:
extension UIViewController {
func presentInKeyWindow(animated: Bool = true, completion: (() -> Void)? = nil) {
DispatchQueue.main.async {
UIApplication.shared.keyWindow?.rootViewController?
.present(self, animated: animated, completion: completion)
}
}
func presentInKeyWindowPresentedController(animated: Bool = true, completion: (() -> Void)? = nil) {
DispatchQueue.main.async {
UIApplication.shared.keyWindowPresentedController?
.present(self, animated: animated, completion: completion)
}
}
}