How is the app startup architecture of iOS apps and how to optimize it?

Generated on 1/7/2025

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To optimize the app startup architecture of iOS apps, you can focus on several key areas:

  1. Document Launch Experience: For UIKit apps, make the UIDocumentViewController the root view controller and apply customizations to the launch options. This approach helps emphasize your app's unique identity and makes it recognizable at first sight. You can also adopt the new API to enhance the app's launch experience further. For more details, you can refer to the session Evolve your document launch experience (03:13).

  2. SwiftUI Essentials: SwiftUI provides a declarative structure defined by scenes, which can be optimized for app startup. Using WindowGroup and other scene types, you can create a responsive and adaptive UI that works across all Apple platforms. SwiftUI's capabilities extend to building custom widgets and reusing views across platforms, which can help streamline the app startup process. For more insights, check out the session SwiftUI essentials (17:36).

  3. UIKit Improvements: With the iOS 18 SDK, you can adopt new UIKit features, such as improved transitions, animations, and the document launch experience. These enhancements can contribute to a smoother and more efficient app startup. For more information, see the session What’s new in UIKit (00:55).

By focusing on these areas, you can optimize the startup architecture of your iOS apps, making them more efficient and providing a better user experience.