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How can you programmatically navigate back two screens in a navigation stack that has at least three view controllers?

hard📝 Application Q9 of 15
iOS Swift - Navigation
How can you programmatically navigate back two screens in a navigation stack that has at least three view controllers?
AUse popToRootViewController to go back two screens
BUse popToViewController with the view controller at index count-3
CCall popViewController twice in a row
DUse pushViewController with the previous view controller
Step-by-Step Solution
Solution:

  1. Step 1: Understand navigation stack indexing

    View controllers are in an array; to go back two screens, pop to the controller two places below top.

  2. Step 2: Use popToViewController with correct index

    Index count-3 targets the controller two below the top, popping back two screens at once.

  3. Final Answer:

    Use popToViewController with the view controller at index count-3 -> Option B

  4. Quick Check:

    popToViewController with index = multi-step back [OK]
Quick Trick: popToViewController can jump back multiple screens [OK]
Common Mistakes:
  • Calling popViewController twice (may cause animation issues)
  • Using popToRootViewController which goes to root, not two back
  • Trying to push previous controller

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