Async/Await in Swift: Modern Concurrency Patterns
Article Summary
Asukhija from Expedia Group shows how two simple keywords can eliminate callback hell in Swift. If you've ever drowned in nested closures, this is your lifeline.
Apple introduced async/await in Swift during WWDC 2021, bringing JavaScript-style asynchronous programming to iOS. This article walks through a real-world travel app example, showing how to refactor nested API calls for trip cancellations and refund status checks into clean, readable code.
Key Takeaways
- Async/await eliminates nested closure pyramids with linear, readable code
- Mark functions with 'async' keyword, pause execution with 'await'
- Parallel execution possible by adding 'async let' before variables
- Real example: fetching trips and refund status becomes 70% less code
Critical Insight
Swift's async/await transforms messy nested closures into clean, sequential code that's easier to write, read, and maintain.
