Feb 27, 2020Analyzing and Improving Build times in iOSBuild Time, Compilation Modes and Tools — In this article, I write about: Analyzing XCode Projects Build Time with XCLogParser. Analyzing Swift Code with Sitrep. How I decreased our iOS Project Debug Build-Time by 40%! How a Swift compiler bug made our Release-builds take roughly 50 minutes (and how I solved that problem). Debug-Mode. A few months ago…Xcode7 min read
Jan 31, 2020Modular Architecture in iOS: DependenciesA while ago I wrote an article about a Modular Architecture in iOS. I had to leave many details out to keep it short and readable. So, I’d like to expand a little and write about some details. Some of the things I will cover in this article: Types of…Swift7 min read
Aug 20, 2019Modular Architecture in iOSIntro In large scale projects, and arguably in any project, the capability for creating, running and testing parts in isolation is a necessity. A change in one part should not require to recompile the entire app until it is really necessary. In this article, I’m going to explain how we can…Swift5 min read
Jul 15, 2019Reducing Memory Footprint and OOM Terminations in iOSHow to avoid getting killed by the OS. — In this article, we are going to explore some techniques to make applications consume less memory (RAM) and to prolong their life expectancy. First, we will describe some key concepts such as OOM terminations and memory warnings. Then we will describe different techniques to decrease the memory usage and finally…Swift12 min read
Feb 4, 2019Strong-typed Notifications in SwiftMaking Notifications type-safe and reactive with RxSwift. — Notifications are a very useful mechanism of communication that lets us connect decoupled parts of our system through events. It is based in the GOF observer pattern. We post a notification when something occurs and many objects can react to it. As useful as it might be, the off-the-shelf mechanism…Swift7 min read
May 7, 2018Memory Leaks in SwiftUnit Testing and other tools to avoid them. — In this article we will talk about memory leaks and we will learn how to use Unit Testing to detect them. Here’s a sneak peek: Important: I will explain what memory leaks are, talk about retain cycles and other things you might already…Swift9 min read
Feb 21, 2018Reactive Heart Rate Monitors in SwiftLeveraging the power of RxSwift and RxBluetoothKit to interact with HR monitors in a seamless way — Integrating Core Bluetooth to connect to Heart Rate Monitors needs a lot of work. If you are familiar with reactive programming, RxBluetoothKit makes things a lot easier. But you still need to understand how Core Bluetooth works and write a considerable amount of code to talk to HR monitors. RxHeartRateMonitors…Swift6 min read
Aug 5, 2017Why use RxSwift?Short answer: Asynchrony. Somebody asked me 2 questions the other day. Why should I use RxSwift? Is it good for all projects, or is it better not to use it sometimes? I had been working with RxSwift for a couple of months so I had an idea about its benefits…Reactive Programming6 min read
Feb 20, 2017Swift Protocol Extensions Method DispatchEmbrace static dispatch Today I want to write about a bug that I found. I was researching CoreValue when I bumped into this one. CoreValue is a framework that allows you to persist value types using CoreData. The bug caused duplicate entries in the database. The bug was interesting too…Swift6 min read
Feb 14, 2017Value types in CoreDataPersist them with CoreValue Is it possible to implement business model objects with value types only? What about using CoreData to persist them? In this post I will examine CoreValue. A lightweight framework intended to give support for achieving such task. I have built a small app to test it…Swift6 min read
