how to do interactive transitions for child view controllers?

To create interactive transitions for child view controllers, you can refer to the session Enhance your UI animations and transitions from WWDC 2024. This session covers how to handle transitions in UIKit, including the view controller lifecycle and appearance callbacks.

Here are the steps to create interactive transitions for child view controllers:

1. Specify the Transition Style: First, specify the desired transition style for the view controller. For example, you can use the zoom transition by specifying it on the pushViewController.

2. Provide the Source View: Provide the view to use as the source of the transition. This helps the system know which view to zoom from or to.

3. Handle Callbacks: Utilize the view controller lifecycle and appearance callbacks to manage the state during transitions. For instance, you can use viewDidAppear or viewDidDisappear to reset any state at the end of the transition.

4. Use Stable Identifiers: When dealing with reusable views, such as in a collection view, capture a stable identifier (e.g., a model object) rather than the view directly. This ensures that the correct view is used during the transition.

For more detailed information, you can watch the chapter on UIKit view controller life cycle and callbacks in the session "Enhance your UI animations and transitions".

Relevant Sessions

1. Enhance your UI animations and transitions
2. Create custom visual effects with SwiftUI

These sessions provide comprehensive guidance on implementing and customizing transitions in both UIKit and SwiftUI.