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SwiftUI: Laziness of List Interferes with Selection and Presentation of Detail

Aug 24, 2020

iOS 14 introduces some laziness in certain views, like for example there are now lazy variants of HStack and VStack. I’ve been working on a SwiftUI-version of an app of mine and the findings of my research for these bugs led me to believe that Apple added some lazy optimisations to Lists as well.

Unfortunately those optimisations seem to be breaking selection and presentation of detail views to a degree that they would be show stoppers for any universal app relying on List and its automatic promotion to being a split view on iPad.

I filed this as FB8521674 in the Apple Feedback App.

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Old and New

Oct 03, 2019

I know, I know, I cannot seem to find any time to reasonably blog about my life as developer. Nevertheless here are a few tidbits of late.

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DTCoreText 1.6.23

Sep 11, 2019

Hot on the heels of the previous maintenance release, which was only 3 Months ago, this one was required because Apple no longer allows Apps to contain references to UIWebView.

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DTFoundation 1.7.14

Sep 10, 2019

Several recent pull requests, as well as an acute deprecation of UIWebView made it necessary to push out this maintenance update. Even more so, because this framework is a dependency of DTCoreText which also needs an update.

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DTCoreText 1.6.22

Jun 28, 2019

The previous release was almost 2 years ago, and several people requested this one, so I finally got around to doing it.

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Mac Mini 2018 as Build Server

Nov 16, 2018

I’ve long had a longing to have a Mac Mini as build server in my technics room. After Apple finally updated it to (now) fashionable space grey, it was a must purchase for my company.

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Regression: CGImageSource doesn’t render background image of certain PDFs

Oct 17, 2018

This is a curious bug in Mohave, which is causing some headache for a client of ours who is relying on this functionality in their production work flow, but since this is broken in Mohave they cannot use machines they have already upgraded for this.

And before you ask why we didn’t report this earlier, as there were several months between WWDC and now… well, we didn’t use Mohave in production and it didn’t occur to us that something that was working before could be broken in a nice and shine new macOS version… 🙂

Filed in OpenRadar and under rdar://45338633. Due to the proprietary nature of the sample PDF, I didn’t post that to my Radar samples repo.

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BarCodeKit 1.3.2

Jun 07, 2018

This new release of BarCodeKit fixes an issue with iOS-compatibility and several new warnings pointed out by Xcode 9.4.

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ProductLayer Post Mortem

Apr 22, 2018

In the beginning, there was an idea: To provide a web service for app developers that would let them get basic product information – like a title and category – for a product which they only have a bar code for. I imagined that this could be the basis for a plethora of niche apps, each serving a different kind of niche: keep track of your books, CDs, games. Keep your inventory current, never again miss some food expiration date.

I thought that many app developers would have many users and those users would then add products to the global database if they encounter one that couldn’t be resolved. Monetization would be done from app developers who had the most web API traffic and at a later stage from letting product manufacturers analyse the sentiment about their products.

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QA: Apple slowing down older iPhones

Mar 07, 2018

Tara from MacFixIt Australia asked:

Do you think Apple deliberately slowed down the performance of the older iPhones?

Sorry, but everybody following the story knows what happened and that the question is wrong. Rather you should have asked it to be technically accurate.

Update, April 28th: MacFixIt Austria used parts of my comment in a larger post.

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