[Solved] Given the following code in prepare(for:sender:): if let dest =... ProfileViewController { dest.userName = "Alice" } What will be the value of userName in ProfileViewController after the segue? | iOS Swift

iOS Swift - Navigation

Given the following code in prepare(for:sender:): if let dest = segue.destination as? ProfileViewController { dest.userName = "Alice" } What will be the value of userName in ProfileViewController after the segue?

A"Alice"

Bnil

C"Bob"

DEmpty string ""

Step-by-Step Solution

Solution:

Step 1: Analyze the assignment in prepare(for:sender:)
The code assigns the string "Alice" to the userName property of the destination controller.
Step 2: Understand that this value is passed before the segue
Since the assignment happens before the transition, the destination will have userName set to "Alice".
Final Answer:
"Alice" -> Option A
Quick Check:
Assigned value = "Alice" [OK]

Quick Trick: Data assigned in prepare(for:) is available after segue [OK]

Common Mistakes:

Assuming userName remains nil
Confusing with default values
Thinking assignment happens after view loads

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More iOS Swift Quizzes

ProfileViewController { dest.userName = "Alice" } What will be the value of userName in ProfileViewController after the segue?

Step 1: Analyze the assignment in prepare(for:sender:)

Step 2: Understand that this value is passed before the segue

Final Answer:

Quick Check:

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