A weekly Swift Blog on Xcode and iOS Development

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The operation couldn’t be completed: solving errors in Swift

"The operation couldn't be completed" is a common error to receive from Apple's standard SDKs or 3rd party libraries. The ...

• 3 min read Mar 21, 2023 / Swift

Equatable conformance in Swift explained with code examples

Equatable conformance allows you to compare one object with another. Based on whether the objects match, you can perform a ...

• 3 min read Mar 07, 2023 / Swift

Using User Defaults to store preferences in Swift

User Defaults are the go-to solution for Swift applications to store preferences that persist across launches of your app. It's ...

• 4 min read Feb 14, 2023 / Swift

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Learn SwiftUI

View Composition using ViewModifiers in SwiftUI

View Composition allows you to create reusable components to create enriched views. You can extract logic into reusable components using ...

• 4 min read Feb 28, 2023 / SwiftUI

Introducing Roadmap: Offer Public Feature Voting

Roadmap is a new open-source framework written completely in Swift and SwiftUI, allowing you to integrate feature voting functionality for ...

• 4 min read Feb 21, 2023 / SwiftUI

How to use FormatStyle to restrict TextField input in SwiftUI

A custom FormatStyle can help you control the allowed characters of a SwiftUI TextField. You might want to allow numbers ...

• 3 min read Dec 06, 2022 / SwiftUI

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Combine all the things

@Published risks and usage explained with code examples

@Published is one of the property wrappers in SwiftUI that allows us to trigger a view redraw whenever changes occur ...

• 4 min read Mar 01, 2022 / Combine SwiftUI

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 ...

• 3 min read Dec 07, 2021 / 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 ...

• 4 min read Sep 07, 2021 / Combine

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Dive into Core Data

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 ...

• 3 min read Apr 20, 2021 / Combine Core Data

Data validation on insertion, update, and deletion in Core Data

Data validation in apps is important to make sure we save data conforming to the business rules. A name should ...

• 3 min read Nov 10, 2020 / Core Data

Derived Attributes to improve Core Data Fetch Performance

Derived attributes are available since iOS 13 and aim to improve fetch performance in many different scenarios. Although we have ...

• 3 min read Nov 03, 2020 / Core Data

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Be an expert on Xcode

RocketSim 10.0: Builds Apps Faster

RocketSim is a developer tool that gives your iOS Simulator extra functionalities to increase day-to-day development productivity. Floating windows become ...

• 13 min read Mar 14, 2023 / Xcode