[Solved] How do you correctly declare an asynchronous function that must execute on the main actor in Swift? — Ans: @MainActor func updateUI() async { /* code */ } | iOS Swift

iOS Swift - Concurrency

How do you correctly declare an asynchronous function that must execute on the main actor in Swift?

Afunc @MainActor updateUI() async { /* code */ }

B@MainActor func updateUI() async { /* code */ }

Cfunc updateUI() async @MainActor { /* code */ }

D@MainActor async func updateUI() { /* code */ }

Step-by-Step Solution

Solution:

Step 1: Attribute Placement
@MainActor is placed before the function declaration.
Step 2: Async Keyword
Async comes after the function name and before the braces.
Final Answer:
@MainActor func updateUI() async { /* code */ } -> Option B
Quick Check:
@MainActor precedes func, async follows func name [OK]

Quick Trick: @MainActor precedes func, async follows func name [OK]

Common Mistakes:

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How do you correctly declare an asynchronous function that must execute on the main actor in Swift?