How can I build responsive layouts in iOS?

To build responsive layouts in iOS, you can leverage several techniques and tools discussed in various WWDC sessions:

Dynamic Type:
- SwiftUI: Use the dynamicTypeSize environment keypath to adjust your layout based on the text size. For example, you can switch between HStack and VStack layouts depending on the text size to ensure readability and avoid truncation. This is demonstrated in the session Get started with Dynamic Type.
- UIKit: Utilize UIStackView to manage your subviews either vertically or horizontally. You can respond to changes in text size by subscribing to the UIContentSizeCategoryDidChangeNotification and updating the stack view accordingly. More details can be found in the session Get started with Dynamic Type.
Safe Areas:
- When designing for different devices, consider the safe areas to avoid overlapping with hardware or software features like rounded corners, the home indicator, or the dynamic island on iPhone. This is particularly important for full-screen experiences on iPad, iPhone, and Mac. This concept is covered in the session Design advanced games for Apple platforms.
Adaptive Layouts:
- Break your UI into separate sections anchored to specific sides of the screen. This helps maintain consistent sizes and distances as you move between different device shapes and aspect ratios. This method ensures that your UI remains comfortable and usable across various devices. More on this can be found in the session Design advanced games for Apple platforms.
SwiftUI Previews:
- Use Xcode previews to quickly see how your views look in different contexts, including dark mode, accessibility settings, and localization. This helps you understand how your feature will feel as you build it. This is highlighted in the session SwiftUI essentials.

Relevant Sessions:

By following these guidelines and utilizing the tools provided by Apple, you can create responsive and adaptive layouts that provide a great user experience across all iOS devices.