autolayout

Asked on 09/26/2024

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Auto Layout is a key feature in both UIKit and SwiftUI for creating dynamic and adaptive user interfaces. At WWDC 2024, several sessions discussed improvements and techniques related to layout management:

  1. Dynamic Type in SwiftUI: The session "Get started with Dynamic Type" explains how to use the dynamicTypeSize environment keypath in SwiftUI to create layouts that adapt to different text sizes, especially for accessibility. This involves using AnyLayout to switch between HStack and VStack layouts based on the text size category. Get started with Dynamic Type (06:00).

  2. Automatic Trait Tracking in UIKit: The session "What’s new in UIKit" introduces automatic trait tracking in iOS 18, which simplifies handling layout changes by automatically tracking and responding to trait changes, such as size class changes, without manual registration. This feature enhances performance by only creating necessary trait dependencies. What’s new in UIKit (06:02).

  3. List Improvements in UIKit: The same session also covers updates to collection and table view APIs, making it easier to update cells and manage list environments. This includes new configurations for headers and footers that automatically update based on the list environment trait. What’s new in UIKit (07:44).

These sessions provide insights into how Apple is enhancing layout capabilities across its platforms, making it easier for developers to create responsive and accessible interfaces.

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