what's the most efficient swiftui component for long list scrolling

The most efficient SwiftUI component for long list scrolling is the List view. The List view in SwiftUI is designed to handle large collections of data efficiently by leveraging view composition and state-driven updates. It provides built-in support for features like sectioned data, swipe actions, and more, making it a powerful tool for creating complex, scrollable interfaces.

For example, in the session SwiftUI essentials, it is mentioned that the List initializer can take a collection parameter, which is a convenience for creating a ForEach view. This allows List to generate views for each element in a collection and provide those to its container, making it highly efficient for long lists.

Additionally, the session What’s new in SwiftUI discusses new enhancements to the ScrollView component, which provides more programmatic control over scrolling behavior, including new scroll positions and the ability to turn off bouncing along a given axis. These enhancements can help you fine-tune the scrolling experience for long lists.

For more advanced use cases, you can also explore the LazyVGrid and LazyHGrid components, which are designed to efficiently handle large collections of data by only creating views for the items that are currently visible on the screen. This is demonstrated in the session Migrate your TVML app to SwiftUI, where a LazyVGrid is used to create a flexible and efficient layout for a vertically scrolling list.

Relevant Sessions:

1. SwiftUI essentials
2. What’s new in SwiftUI
3. Migrate your TVML app to SwiftUI