Author Archives

Radar: ABUnknownPersionViewController

Jun 18, 2015

Apple is introducing a new contacts framework in iOS 9. The do so very aggressively to even replace view controllers from AddressBookUI.framework with their new implementations. Unfortunately not without problems.

Normally I am prefer to keep quiet about bugs in iOS beta versions, but this one affects apps public on the app store which are using this view controller and therefore I felt it necessary to warn my iOS developer colleagues about it. This is the crash I was alluding to on iOS Today.

rdar://21357089 – ABUnknownPersionViewController_modern overreleases CNContactViewController
rdar://21438771 – ABUnknownPersionViewController Regression

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Core Image Barcode Erratum

Jun 17, 2015

Since iOS 7, Core Image contains several generators for 2D barcodes. While I was writing my book Barcodes and iOS, only the CIQRCodeGenerator was documented. Apple’s standard policy is that classes which are not documented are to be considered off limites. Seeking clarification, I emailed an Apple evangelist and he confirmed that this is still the case.

So I mentioned the three other – undocumented – Core Image filters in the chapter about barcode generation, but cautioned the reader about their usage in app store apps: CIAztecCodeGenerator, CIPDF417BarcodeGenerator and CICode128BarcodeGenerator. At WWDC 2015, I learned that my assumption as well as the evangelist’s confirmation were incorrect.

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iOS Today

Jun 16, 2015

Three years ago, I last visited the TWiT Studio in Petaluma, California. Located one hour by car north of San Francisco, the “TWiT Brockhouse” is well worth visiting if you are a fan of the shows that Leo Laporte and his team are producing there. I was guest on their show following the WWDC week.

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WWDC 2015 Review

Jun 14, 2015

The 26th annual Apple Worldwide Developer’s Conference was held June 8th through 12th in the Moscone West conference center. It was my fourth attendance to the show, with only 2014 being a break in my streak.

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The WWDC Keynotes

Jun 09, 2015

Don’t believe what the blogs are telling you. What they have witnessed – and live-blogged about – was not the entire story. They only got to see one third of the whole story.

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WWDC Pre-Show

Jun 07, 2015

I don’t like myself when I am grumpy. And I am grumpy when I am tired. Which is why I – if in possession of a WWDC ticket – I try to arrive in San Francisco a few days ahead of the conference. I hate the feeling of being a living dead with my body wanting to go to sleep even though the sun showing its warmest and friendliest face.

7 Comments

FOKUS KIND Medien acquires iWoman

Jun 02, 2015

Drobnik KG and FOKUS KIND Medien, Austria – We are announcing that effective June 1st FOKUS KIND Medien has acquired the iWoman iOS property.

iWoman is a simple and intuitive app for women to keep track on their menstrual cycle. In-app purchases add the ability to keep track of sexual intercourse, daily basal temperature measurements and to have the data passcode protected. iWoman was the first app Drobnik had published on the app store in late 2008.

8 Comments

Retinized!

Jun 01, 2015

I admit that I have been jealous of those lucky people who could afford the luxury of staring into a Retina-resolution screen all day. Last week my ship came in and delivered not one but two Retina-devices.

3 Comments

Apple’s App Analytics

May 02, 2015

Developers received mail from app inviting them to join the waiting list for their new app analytics service. Such a service is long overdue and several businesses are based solely on there not having been any offering by Apple so far. That is about to change.

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Introducing Core Image

Apr 30, 2015

I published a section from my book Barcodes with iOS on DZone. My book is not only about barcodes but also gives short introductions to a plethora of other frameworks which you might not normally come into contact with.

The Core Graphics framework is written in pure C, meaning that it’s impossible to use CGImage instances directly with UIKit. Apple created UIImage as an Objective-C wrapper class around CGImage to bridge the gap. We explore Core Image in this article.

My book currently available at a discount via the promo code mentioned on DZone.

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