[Solved] Identify the error in this code snippet inside tableView(_:leadingSwipeActionsConfigurationForRowAt:): let editAction = UIContextualAction(style: .normal, title:... | iOS Swift

iOS Swift - Lists and Data Display

Identify the error in this code snippet inside tableView(_:leadingSwipeActionsConfigurationForRowAt:):

let editAction = UIContextualAction(style: .normal, title: "Edit") { action, view, completion in
    print("Edit tapped")
    completion()
}
return UISwipeActionsConfiguration(actions: [editAction])

AUIContextualAction style .normal is invalid

BThe completion handler is called without a Bool parameter

CThe title parameter must be nil for .normal style

DUISwipeActionsConfiguration requires at least two actions

Step-by-Step Solution

Solution:

Step 1: Check completion handler signature
The completion closure requires a Bool parameter indicating success or failure.
Step 2: Identify incorrect call
Calling completion() without argument causes a compile error.
Final Answer:
The completion handler is called without a Bool parameter -> Option B
Quick Check:
completion must be called with true or false [OK]

Quick Trick: Always call completion(true) or completion(false) in swipe action handlers [OK]

Common Mistakes:

Calling completion without argument
Using invalid style values
Assuming multiple actions are mandatory

Master "Lists and Data Display" in iOS Swift

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep UI Try Challenge Build Recall Publish

More iOS Swift Quizzes

Identify the error in this code snippet inside tableView(_:leadingSwipeActionsConfigurationForRowAt:):

Step 1: Check completion handler signature

Step 2: Identify incorrect call

Final Answer:

Quick Check:

Want More Practice?