Sheets in SwiftUI allow you to present views that partly cover the underlying screen. You can present them using view modifiers that respond to a particular state change, like a boolean or an object. Views that partly cover the underlying screen can be a great way to stay in the context while presenting a new …
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@dynamicCallable in Swift explained with code examples
It’s all in the name: @dynamicCallable in Swift allows you to dynamically call methods using an alternative syntax. While it’s primarily syntactic sugar, it can be good to know why it exists and how it can be used. We covered @dynamicMemberLookup earlier, allowing us to express member lookup rules in dynamic languages naturally. @dynamicCallable is …
Binary Targets in Swift Package Manager
Binary Targets in Swift Package Manager (SPM) allow packages to declare xcframework bundles as available targets. The technique is often used to provide access to closed-source libraries and can improve CI performance by reducing time spent on fetching SPM repositories. Both downs and upsides are essential to consider when adding binary targets to your project. …
Result builders in Swift explained with code examples
Result builders in Swift allow you to build up a result using ‘build blocks’ lined up after each other. They were introduced in Swift 5.4 and are available in Xcode 12.5 and up. Formerly known as function builders, you’ve probably already used them quite a bit by building a stack of views in SwiftUI. I …
Getting started with Unit Tests in Swift
Unit tests in programming languages ensure that written code works as expected. Given a particular input, you expect the code to come with a specific output. By testing your code, you’re creating confidence for refactors and releases, as you’ll ensure the code works as expected after running your suite of tests successfully. Many developers do …
Refactoring Swift: Best Practices to succeed
Refactoring code is part of the journey toward building sustainable apps. Whether you’re experienced or not: every developer refactors their code to improve its quality or readability. A refactor can be small enough to make you do it unconsciously, while bigger ones can become intimidating. I’ve been developing apps for over 10+ years in which …
Announcing the SwiftLee Talent Collective
Today I’m excited to introduce you to the SwiftLee Talent Collective — an initiative to connect engineers with exciting companies. One of the most frequently asked questions I get relates to how to find a new job or how to make the next career step. I wrote about Swift Jobs: How to make the right …
Alternate App Icon Configuration in Xcode
Adding alternate app icons to your app allows users to customize their home screen with an app icon that fits their style. An alternative icon could be a dark or light-mode version of the original icon or a collection of completely different styles. iOS 10.3 was the first version to support alternative icons. In the …
Never keyword in Swift: return type explained with code examples
The Never type in Swift allows you to tell the compiler about an exit point in your code. It’s a type with no values that prevents writing unuseful code by creating dead ends. While the type Never on its own might be a little unknown, you might have been using it already in your codebase. …
Side Projects: 10 Tips for being successful
It’s common to have a side project as an engineer since we can build our ideas. At the same time, it’s also trending to start a new project before you’ve finished the previous one. You could say there’s a graveyard of many side projects that didn’t reach the public. While I’m a full-time employee at …