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What will happen when this SwiftUI code runs?

medium📝 ui behavior Q13 of 15
iOS Swift - Animations
What will happen when this SwiftUI code runs?
withAnimation(.easeIn(duration: 1)) {
  self.showDetails = true
}
AThe UI instantly shows details without animation
BThe details view fades out instead of appearing
CThe app crashes due to incorrect syntax
DThe details view appears with a smooth ease-in animation over 1 second
Step-by-Step Solution
Solution:
  1. Step 1: Analyze the animation modifier

    The code uses .easeIn(duration: 1) which means a smooth animation easing in over 1 second.
  2. Step 2: Understand the state change effect

    Setting showDetails = true inside withAnimation triggers the UI to update with animation.
  3. Final Answer:

    The details view appears with a smooth ease-in animation over 1 second -> Option D
  4. Quick Check:

    withAnimation + easeIn = smooth 1s animation [OK]
Quick Trick: EaseIn means smooth start animation over given duration [OK]
Common Mistakes:
  • Thinking animation is instant
  • Confusing easeIn with fade out
  • Assuming syntax error without checking carefully

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