How to resolve: "keyWindow" was deprecated in iOS 13.0

How to Resolve: 😱 'keyWindow' was deprecated in iOS 13.0

If you are an iOS developer working with Core Data and Cloud Kit, you may have encountered the dreaded deprecation warning when using UIApplication.shared.keyWindow?.rootViewController?.present(...) in Xcode 11 beta 4. Fear not, we've got you covered! In this guide, we'll walk you through resolving this issue and present an alternative solution. Let's dive in! 🏊‍♂️

Understanding the Deprecation Warning

In Xcode 11 beta 4, Apple introduced a deprecation warning for using keyWindow in iOS 13.0 and later. The deprecation message states that keyWindow should not be used for applications that support multiple scenes, as it returns a key window across all connected scenes. 😬

The Solution: 💡 UIWindowScene

To address this deprecation warning, Apple introduced the concept of UIWindowScene to manage windows within an application that supports multiple scenes. By leveraging this new feature, you can easily present a dialog to the user without relying on the deprecated keyWindow.

Here's how you can update your code to make it compatible with iOS 13.0 and later:

// Check if there's an active scene
if let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene {
    // Get the key window associated with the scene
    if let window = windowScene.windows.first {
        // Get the root view controller and present the dialog
        window.rootViewController?.present(...)
    }
}

By using UIApplication.shared.connectedScenes.first as? UIWindowScene, you can obtain the active window scene. Then, accessing windowScene.windows.first retrieves the associated key window within that scene. Finally, you can retrieve the root view controller from the window and present your dialog as before. 🎉

Wrap Up and Engage!

Congratulations on resolving the deprecation warning and updating your code to support multiple scenes! 👏 In case you encounter any issues or have further questions, feel free to leave us a comment below. We'd love to hear from you and help you out.

Don't forget to share this post with your fellow iOS developers who might be facing the same deprecation warning. Together, we can stay up-to-date with the latest iOS developments and build amazing apps. Happy coding! 💻🚀