?? Understanding Task in Swift Concurrency: The Key to Safe Async Code!
?? Still using DispatchQueue.global() for background tasks? Time for an upgrade!
Before Swift Concurrency, we used GCD (Grand Central Dispatch) to perform async work:
? Problems with GCD:
?? Enter Task in Swift Concurrency!
? What is Task {} in Swift?
Task {} is the modern way to create asynchronous operations in Swift. It allows you to: ? Run background tasks safely ? Auto-handle UI updates (when used inside @MainActor) ? Easily track and cancel operations
?? Example: Running an Async Task
? No need for DispatchQueue.main.async
? No callback hell
?? Structured vs. Unstructured Tas
1?? Structured Tasks (Preferred)
Structured tasks inherit context and lifecycle from their parent. Example: Fetching multiple APIs concurrently inside a function.
? Tasks are automatically managed
? Safe and efficient
2?? Unstructured Tasks (Detached Tasks)
Use Task.detached {} only if the task must run independently of its parent.
? Caution: Detached tasks don’t inherit parent properties like @MainActor.
? Cancelling Tasks Like a Pro
One of the biggest mistakes in async programming is not cancelling tasks when they are no longer needed.
? Proper Task Cancellation
? Prevents unnecessary execution
? Saves battery & performance
?? Key Takeaways
? Task {} is the new GCD alternative
? Prefer structured tasks over detached ones
? Always check Task.isCancelled to avoid wasted work
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