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Understanding Swift Concurrency: AsyncQueue, AsyncStream, and AsyncSequence
Concurrency in Swift has come a long way. If you’ve been working in iOS for more than a couple of years, you’ve probably felt the pain of juggling
DispatchQueue,OperationQueue, semaphores, or worse—nested completion handlers tangled into callback hell. -
The Ultimate Guide to Xcode Environment Variables
Environment variables are powerful, often overlooked tools that can shape the way your iOS app behaves at runtime. With proper usage, you can control logging, test modes, and even the dynamic linking process—all without having to rebuild your application each time. This post compiles all the important Xcode environment variables you should know about, including both system-level and DYLD (Dynamic Linker) variables.
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Swift Compiler Directives: A Hidden Power
Happy December 20, 2024! In this post, we’ll explore Swift compiler directives, sometimes referred to as Swift’s “preprocessor commands.” Swift doesn’t use a traditional C-style preprocessor, but it does provide several compiler-time directives to conditionally compile code, show compile-time warnings/errors, check version availability, and more.
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Essential LLDB Debugger Console Commands
As iOS developers, we often find ourselves spending a good amount of time working with the debugger. When an app misbehaves, the LLDB console becomes an essential companion to quickly inspect objects, evaluate expressions, and step through complex code. While most of us are familiar with common commands like
pandpo, LLDB offers a broader toolbox that many developers seldom use. In this post, we’ll explore both the popular and the lesser-known commands, and demystify their usage so that you can streamline your debugging sessions. -
Mastering Task Groups in Swift Concurrency
Swift’s concurrency model provides a set of tools for running tasks in parallel while keeping code clean and organized. One of the more powerful features of this model is Task Groups, which let you create and manage multiple concurrent tasks under a single structured context. In this article, we’ll dig deeper into Task Groups, demonstrate how to safely combine their results, and walk through a few practical examples.
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Measuring Performance Using XCTest
When working on iOS applications, ensuring your app remains efficient and responsive is just as important as implementing new features. One of the most straightforward ways to keep an eye on performance is by leveraging Unit Tests. While these tests are typically focused on functionality, you can also write specialized tests to measure resource consumption and speed.
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Advanced SwiftUI State Management Patterns
SwiftUI provides multiple ways to manage the data that drives your user interface. Knowing how to use these different state management tools effectively can help maintain clarity and scalability as your app grows. In this post, we’ll dive deeper into how each property wrapper works, when each is most suitable, and how they can fit together in a real-world SwiftUI architecture.
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Elegant async handling with async/await
Swift Concurrency is more than just a new language feature—it’s part of a broader effort to simplify how we work with asynchronous code. Before
async/await, many iOS developers used completion handlers, delegation patterns, or even Combine to manage tasks running in the background. While these older techniques still work, they can lead to tangled code if you’re juggling multiple tasks simultaneously.