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SwiftUI: Binding a custom view with complex state management leads to advanced patterns in iOS 17

👀 Views: 96 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-12
SwiftUI StateManagement Bindings Swift

I tried several approaches but none seem to work... I'm working with an scenario when trying to bind a custom SwiftUI view that manages a complex state hierarchy, and it leads to unexpected UI updates. My custom view, `CustomDetailView`, takes an `@Binding` of a model object and updates various states based on user interactions. However, when I update the model, it sometimes doesn't reflect in the parent view until I manually refresh the parent view. Here's a simplified version of my code: ```swift struct ParentView: View { @State private var model = MyModel(data: "Initial Data") var body: some View { VStack { Text(model.data) CustomDetailView(model: $model) } } } struct CustomDetailView: View { @Binding var model: MyModel var body: some View { Button("Update Data") { model.data = "Updated Data" } } } struct MyModel { var data: String } ``` In this setup, when the button in `CustomDetailView` is tapped, `model.data` is updated, but it doesn't always trigger a view refresh in `ParentView`. I've tried using `@ObservedObject` in `ParentView`, but it doesn't seem to solve the scenario. I'm also aware that modifying a `@Binding` directly can sometimes lead to unexpected results, but this approach is crucial for my app's architecture. I've verified that the state is being updated by printing debug statements, and I receive the expected output in the console. However, the UI doesn't reflect these changes immediately, leading to a disjointed experience for the users. Any insights on how to ensure that the parent view properly updates when the model changes in the child view would be greatly appreciated. For context: I'm using Swift on Windows. Am I missing something obvious? My team is using Swift for this web app. What are your experiences with this?