iOS Swift - SwiftUI Layout
You want to display a horizontally scrolling list of 1000 images efficiently. Which approach is best to keep your app fast and memory-friendly?
You want to display a horizontally scrolling list of 1000 images efficiently. Which approach is best to keep your app fast and memory-friendly?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand lazy loading for large lists
LazyHStack inside ScrollView creates views only when needed, saving memory for large lists.Step 2: Compare with eager loading
HStack or VStack loads all views immediately, which is slow and memory-heavy for 1000 images.Step 3: Confirm horizontal scrolling
LazyHStack arranges items horizontally and works well with horizontal ScrollView.Final Answer:
Use ScrollView with LazyHStack and load images lazily inside ForEach -> Option AQuick Check:
LazyHStack + ScrollView for large horizontal lists = C [OK]
Quick Trick: Use LazyHStack inside ScrollView for large horizontal lists [OK]
Common Mistakes:
- Using HStack loads all views immediately
- Confusing vertical and horizontal stacks
- Using List when horizontal scrolling is needed
Master "SwiftUI Layout" in iOS Swift
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore iOS Swift Quizzes