A weekly Swift Blog on Xcode and iOS Development

Swift Keywords

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Some keyword in Swift: Opaque types explained with code examples

The some keyword in Swift declares opaque types, and Swift 5.1 introduced it with support for opaque result types. Many ...

• 6 min read Jun 21, 2022 / Swift

Increase App Ratings by using SKStoreReviewController

SKStoreReviewController allows asking your users for App Store ratings from within the app. Positive ratings can help your app stand ...

• 6 min read May 31, 2022 / Optimization Swift

Memory leaks prevention using an autoreleasepool in unit tests

Memory leaks often happen without notice. Although best practices like using a weak reference to self inside closures help a ...

• 4 min read May 10, 2022 / Swift

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Learn SwiftUI

Using NavigationLink programmatically based on binding in SwiftUI

NavigationLink in SwiftUI allows pushing a new destination view on a navigation controller. You can use NavigationLink in a list ...

• 5 min read Jun 14, 2022 / SwiftUI

Markdown rendering using Text in SwiftUI

SwiftUI comes with built-in markdown support for text, making it easy to transform the text into bold, italic, and other ...

• 2 min read May 24, 2022 / SwiftUI

Downloading and Caching images in SwiftUI

Downloading and caching images is an essential part of building apps in Swift. There are several ways of downloading images ...

• 4 min read Apr 19, 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

App Icon Generator is no longer needed with Xcode 14

An App Icon Generator generates all required app icon sizes based on a single-size icon input file. Creating and dragging ...

• 7 min read Jun 07, 2022 / Optimization Xcode

RocketSim 8.0: Enhance your iOS Simulator

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

• 9 min read May 14, 2022 / Xcode