How to install AwaitKit with CocoaPods?

Add `pod 'AwaitKit', '~> 5.2.0'` to your Podfile, run `pod install`, and ensure PromiseKit 6.10 is available—if not, execute `pod repo update` as noted in the README. This integrates the library seamlessly into Xcode projects.

AwaitKit vs native Swift async/await: which should I use?

Use AwaitKit for projects on Swift 4.0 to 5.4 to gain async/await syntax without upgrading, but prefer native async/await in Swift 5.5+ for better performance, built-in support, and features like structured concurrency. AwaitKit acts as a bridge for older codebases.

How to avoid deadlocks when using custom queues in AwaitKit?

Follow the README's guidance: avoid blocking the main thread in async blocks and use separate queues for synchronous and asynchronous tasks. For example, execute heavy operations on background queues and update UI on the main queue selectively.

Can AwaitKit be used with SwiftUI?

Yes, but it requires careful queue management to prevent UI blocking. Use `DispatchQueue.main.ak.async` for UI updates within async blocks, similar to how you'd handle promises in Combine or native async/await with SwiftUI's lifecycle.

Is AwaitKit still maintained for newer iOS versions?

The README lists support for iOS 8.0+ and Swift 4.0+, but there's no mention of updates for Swift 6 or iOS 17+. Given the shift to native async/await, maintenance may be limited, so check the GitHub repository for recent activity before adopting.

How to handle errors in AwaitKit async blocks?

Use Swift's try/catch inside `async` closures—errors thrown are automatically caught and reject the promise, as shown in the README example with `do-catch`. This mimics synchronous error handling, making it more intuitive than promise-based error chaining.

Open-Awesome

AwaitKit

MITSwift

A Swift library that brings ES8 Async/Await syntax to write asynchronous code sequentially.

GitHub

747 stars53 forks0 contributors

What is AwaitKit?

AwaitKit is a Swift library that implements the ES8 Async/Await pattern, allowing developers to write asynchronous code in a sequential, synchronous-like manner. It solves the problem of callback hell and complex promise chaining by providing a clean syntax for managing asynchronous operations, making code easier to read and maintain.

Target Audience

iOS and macOS developers working with Swift who need to manage asynchronous operations, such as network calls, file I/O, or background tasks, and want to avoid nested callbacks or verbose promise chains.

Value Proposition

Developers choose AwaitKit for its intuitive Async/Await syntax that reduces boilerplate, improves code clarity, and integrates seamlessly with PromiseKit for reliable promise management, offering a modern approach to asynchronous Swift programming.

Overview

The ES8 Async/Await control flow for Swift

Use Cases

Best For

Simplifying complex asynchronous workflows in Swift apps
Replacing nested completion blocks with sequential code
Managing network requests and API calls cleanly
Handling background tasks without callback hell
Integrating with PromiseKit-based projects
Writing asynchronous code that is easier to debug and maintain

Not Ideal For

Projects using Swift 5.5 or later with native async/await support
Teams prioritizing minimal dependencies or avoiding PromiseKit integration
Applications requiring advanced concurrency features like actors or structured concurrency
Developers needing server-side Swift with Vapor or other frameworks that have built-in async support

Pros & Cons

Pros

Clean Async/Await Syntax

Enables writing asynchronous code in a sequential style using `async` and `await`, directly reducing callback hell as shown in the README's comparison with nested completion blocks.

Seamless PromiseKit Integration

Built on PromiseKit v6.10, providing robust promise management and easy adoption for existing PromiseKit-based projects without reinventing the wheel.

Flexible Queue Management

Supports execution on custom dispatch queues, allowing precise control over background and main thread operations for optimized performance.

Intuitive Error Handling

Allows Swift's try/catch within async blocks, automatically rejecting promises on thrown errors, simplifying error propagation compared to manual promise chaining.

Cons

External Dependency Burden

Requires PromiseKit as a dependency, adding setup complexity and potential version conflicts, especially in projects not already using PromiseKit.

Deadlock Risk in Queues

The README explicitly warns about deadlocks when mixing synchronous and asynchronous operations on custom queues, necessitating careful design and debugging.

Outdated for Modern Swift

With Swift 5.5 introducing native async/await, AwaitKit is primarily useful for legacy codebases on Swift 4.0 to 5.4, limiting its relevance for new projects on recent Swift versions.

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