optimize image loading on swiftui

To optimize image loading in SwiftUI, you can consider several strategies based on the content presented at WWDC:

1. Use HDR for Dynamic Image Experiences: If you're working with HDR images, SwiftUI automatically handles tone mapping when using a UIImageView or a SwiftUI view. You can create a SwiftUI image view and specify the allowed dynamic range modifier to determine how much of the file's dynamic range should be displayed. This is a straightforward way to handle HDR images efficiently. For more control, consider using Core Image and Metal for interactive image changes. Use HDR for dynamic image experiences in your app.

2. Concurrency for Image Processing: When processing multiple images, such as displaying them in a grid view, you can use Swift concurrency to optimize performance. This involves processing images in batches concurrently rather than one at a time. For example, you can crop images to focus on the main subject using a saliency image request. Discover Swift enhancements in the Vision framework.

3. Dynamic Layouts with SwiftUI: For images and icons, especially when dealing with dynamic type sizes, you can use the scaledMetric API to ensure images resize appropriately based on the selected text size. This helps maintain a balance between text and image sizes, ensuring that essential content is prioritized. Get started with Dynamic Type.

These strategies can help you optimize image loading and display in SwiftUI, ensuring a smooth and efficient user experience.