WWDC24 Prologue

I have been doing iOS development for a few years now, and visiting the WWDC became one of my bucket list item. During COVID there were significant changes introduced, for example the in person event got much shorter. Now we are talking about a reception on Sunday afternoon, a whole Monday, and half day of ...

OpenSSL and X509 Certificate on iOS

I got a task last December to build the OpenSSL framework for the iOS platform. I immediately started to be skeptical: why do we need this particular framework on iOS, since we have so many things available from the iOS SDK and different Apple frameworks?  I couldn’t have been more wrong.  Apple is not offering OpenSSL in ...

The Provisioning Profile Crash Course – Part 4

03. May 2022 Tools, Xcode 0
The previous posts from this series are Part1, Part2 and Part3. Profile management Just to summarize the dependency graph for the different type of provisioning profiles here is the graph: The Developer Profile depends on / consist the following Team identifiers, Developer certificates, Devices, Entitlements/capabilities, which is also part of the Identifier, Apple Certificates. The Distribution Profile ...

Provisioning Profile Crash Course – Part 3

26. April 2022 Tools, Xcode 0
The previous posts from this series are Part1 and Part2. Let start with the most important question: Why we need a provisioning profile?  The short answer is: Because we want to run our shiny new app on a physical device.   So, if you never ever want to run your ode on a physical device, ...

Provisioning Profile Crash Course – Part 2

15. April 2022 Tools, Xcode 0
In the first part of this course I went through the first preparation steps in order to create the provisioning profile, namely that how to create the different certificates, and also how to add the devices that you own. In this post we will get into another important ingredients of “cooking” of the provisioning profiles: ...

Swift enum range matching

I have been recently working on a HealthKit related app, where I wanted to categorise the blood pressure data. If you are not familiar with this data, here is a little explanation: Measuring Blood pressure Blood pressure build up from 2 numbers: the systolic value and the diastolic value. The valid value ranges for systolic ...