// 5 articles available
Learn how to use Swift's @Observable macro introduced in iOS 17, understand its advantages over ObservableObject, and migrate your existing code to the modern observation system.
Understand the difference between @State and @Binding in SwiftUI, when to use each, and how they work together to manage data flow between views.
Learn different approaches for handling optional ObservableObject instances in SwiftUI, from conditional rendering to wrapper patterns.
Learn how to detect app lifecycle changes in SwiftUI, save state when your app enters the background, and restore it when users return, using scenePhase and UIApplication notifications.
Learn how to implement undo/redo functionality in SwiftUI using UndoManager, including environment injection, registering actions, and creating undo buttons for professional editing experiences.