What tips should one follow to avoid unnecessary re rendering in SwiftUI?

To avoid unnecessary re-rendering in SwiftUI, you can follow these tips:

1. Use Value Types: SwiftUI views are value types defined using structs instead of classes. This ensures that views are lightweight and can be recreated efficiently. (SwiftUI essentials)

2. State Management: Ensure that your state changes are minimal and only affect the parts of the view that need updating. SwiftUI automatically keeps your UI up to date by maintaining a representation of the user interface behind the scenes. (SwiftUI essentials)

3. Composition: Breaking up one view into multiple smaller views does not hurt performance. SwiftUI uses composition extensively, and it allows you to organize your code better without compromising performance. (SwiftUI essentials)

4. Avoid Imperative Code: SwiftUI views should be declarative descriptions of the UI state. Avoid using imperative code to make changes to the UI over time. (SwiftUI essentials)

5. Use @State and @Binding Wisely: Use @State for local state within a view and @Binding to pass state between views. This ensures that only the necessary parts of the view hierarchy are updated when the state changes. (SwiftUI essentials)

6. Leverage Previews: Use Xcode previews to quickly see how your views look and behave in different contexts. This helps you identify and optimize parts of your UI that may cause unnecessary re-rendering. (SwiftUI essentials)

By following these tips, you can ensure that your SwiftUI app remains performant and avoids unnecessary re-rendering.