This is part 3 of my concurrency series. Check out Part 1 and Part 2 if you missed them. In my earlier discussion of sync, async, serial, and concurrent, I alluded to some pitfalls that you might encounter while working with concurrency. That’s our main topic for this article. …

This is part 2 of my concurrency series. If you missed part 1, check it out here. In part 1, we explored the differences between synchronous and asynchronous execution when dispatching tasks using GCD. Now, we’re going to focus on what happens in the queue after you dispatch your task. Serial vs Concurrent …

Throughout this concurrency series, I am going to cover the different types of queues in Grand Central Dispatch (GCD.) More specifically, I will explore the differences between serial and concurrent queues, as well as the differences between synchronous and asynchronous execution. If you’ve never used GCD before, this series is…

Cycles… no, not the fun kind shown above. I mean strong reference cycles, the kind that causes entire view controllers to leak in your iOS app. More specifically, I want to talk about the use of [weak self] inside of Swift closures to avoid reference (or retain) cycles, and explore…

In my earlier posts, I mentioned how personal projects helped me stay motivated while I was learning programming. In this post I will talk about the first personal project that I built back in 2017, covering all steps from idea to final version. I covered the purpose of this project…

In Part 1 I discussed two different ways to perform 2D drawing on iOS, both of which are CPU-based. The first one performed ok on the iPhone but very poorly on the iPad (17 fps average), while the second one delivered great performance and only incurred about 25% CPU utilization…

As I was building my recently released drawing game, I explored different ways to perform 2D drawing on iOS. Throughout this 2-part series, I will share what I’ve learned by comparing the performance of 4 distinct ways to draw on the platform. …

Last week I published my first open source library, QuickTicker. It’s a Swift library that lets you create simple ticker animations using one line of code. The result looks like this: