Combine

All Swift Combine related blog posts to teach you everything you need about using this functional reactive programming framework from Apple.

RunLoop.main vs DispatchQueue.main: The differences explained

RunLoop.main and DispatchQueue.main are often used as schedulers within Combine. During code reviews, I often encounter inconsistency in using one ...
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  •  3 min read Combine

PassthroughSubject vs. CurrentValueSubject explained

PassthroughSubject and CurrentValueSubject are two types from the Combine framework that conforms to the Subject protocol. Both are very similar ...
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  •  4 min read Combine

How to observe NSManagedObject changes in Core Data using Combine

Observing changes in Core Data NSManagedObject instances with Combine publishers can be a great solution to keep your user interface ...
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  •  3 min read CombineCore Data

Getting started with the Combine framework in Swift

Combine was introduced as a new framework by Apple at WWDC 2019. The framework provides a declarative Swift API for ...
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  •  9 min read CombineSwift

Error handling in Combine explained with code examples

Once you get started with Combine you'll quickly run into error handling issues. Each Combine stream receives either a value ...
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  •  4 min read CombineSwift

Combine debugging using operators in Swift

Combine debugging can be hard with long stack traces which don't help at all. Asynchronous callbacks follow up on each ...
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  •  4 min read CombineDebuggingSwift

Creating a custom Combine Publisher to extend UIKit

A Custom Combine Publisher can add missing functionalities to UIKit elements you use every day. A lot of boilerplate code ...
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  •  4 min read CombineSwift

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