David Cordero


Improving the iOS development cycle with breakpoints

Published on 28 Mar 2019

The Development, Build and Run cycle is by far one of the most annoying parts when working in native iOS development. Your thinking and creativity flows are suddenly stopped by unnecessary waiting times, just because for some reason Xcode decided that it was a good moment to build again certain files that were not modified at all.

Apart from that, one always ends up having to navigate over and over again to the screen in which you are working on.

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Librem 5, a mobile platform which focuses on your privacy

Published on 30 Dec 2018

The world of operating systems for mobile devices has been dominated by Apple and Google for the last ten years.

Both android and iOS have been around for quite a while already, and in their current versions, 9 and 12 respectively, they have reached a huge level of stability and customer satisfaction.

They also offer a huge number of Apps available in their App stores which make of them great platforms to smoothly achieve every kind of daily tasks.

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Apple Tv, designing beyond Siri Remote

Published on 23 Nov 2018

Together with Apple Tv 4th Generation, Apple introduced its new remote control, Siri Remote, a completely new concept to navigate on big screen interfaces.

In a world of remote controls with tons of buttons, Apple had the courage 😜 to release a box controlled by only six buttons and a little digitizer, having only two of the buttons and the digitizer available for developers….

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Extending TVML with custom templates

Published on 07 Jun 2018

TVML templates are the base of every App based on TVMLKit. They ease the creation of Apps following the UI patterns of tvOS.

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Mind the cup

Published on 07 Mar 2018

It was a few weeks ago that I went to Google.

Google has great offices here in Zurich, and I thought that having them organizing a technical meetup was a really good opportunity to see them from the inside.

It was a great and interesting day, and I am happy to have met nice people in a very friendly environment.

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Bumping the performance of TVML with Prototypes and Data Binding… or not

Published on 25 Nov 2017

The low performance of TVMLKit has been one of its biggest bottle necks since tvOS was launched. Not only when performing heavy computing task, which could be after all derived to Swift, but also when dealing with a lot of UI elements.

You only have to load a screen with several items and layers and you will start noticing delays and glitches when loading your views.

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TvOSScribble, building Scribble for tvOS

Published on 20 Aug 2017

As I mentioned in Being a tvOS Developer, the lack of buttons on its remote control is one of the biggest challenges when creating Apps for Apple Tv.

It is sometimes quite hard to find intuitive gestures for very common actions. One of those actions is definitely the one to zap among channels.

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Directional clicks on tvOS

Published on 10 Jul 2017

If you have tried to detect directional clicks on tvOS you might have notice that it is not that easy.

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Being a tvOS Developer

Published on 10 Jul 2017

It is already more than one year ago that I came to Zürich and I joined Zattoo.

Zattoo is a small company based in Switzerland, dedicated to the distribution of television through the internet, regardless of the device the users have.

Among these devices are iPhone, iPad, and now that it has an App Store, the 4th generation of Apple Tv “recently” released by Apple.

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TVML and UIKit as happy roommates

Published on 06 Jul 2017

There is a classical beginning for every tvOS tutorial and it is a question: Are you creating a TVKit application or a native UIKit application?

Depending on the answer to that question, you will end up with one of two completely different ways of working to create your application.

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NSTimer stands for NoSwiftyTimer

Published on 22 May 2017

NSTimer is one of the simplest mechanism provided by Apple to create timers.

You probably saw it applied to several purposes: Views being shown or hidden after a certain delay, periodically updated views, or any other task being executed periodically or with a delay. They are without any question a very generic and powerful tool.

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Working with TapGestures in Swift

Published on 02 Mar 2017

A lot of great improvements have been released as part of the last major update of Swift. Swift is growing and growing and, in my opinion, the direction that it is taking is really promising.

On the other hand, it is also true that certain Apple APIs do not have yet the most desirable interface one could wish taking advantage of all those new capabilites of Swift.

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UX / Dev

Published on 08 Oct 2016

One of the most important things to keep in mind when building mobile Apps, is thinking about the user. It is not that easy trying to understand the problems or needs of our users, and the reason that led them to use our App to solve those problems or needs.

No matter how great is your app, and how well it was developed and designed. Apps are always a handicap, the handicap that users have to suffer to get the valuable part of your product, the part that is actually giving a solution for their problem or need.

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Danshari Oriented Development

Published on 15 Aug 2016

Despite of that title I am not going to speak here about any new paradigm, or about any new programming pattern, but about an attitude, and about how we applied that attitude to improve our iOS App in Zattoo.

If you don’t know the concept of Danshari, it is a Japanese made up word consisting of three kanji, meaning in sequence: refusal, disposal and separation.

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Data Sources in Swift… or how to avoid that this new trendy persistence framework determines the architecture of your App

Published on 13 Jun 2016

There are really good frameworks to deal with the persistency of our data in the world of iOS.

Core Data for instance is a great solution offered by Apple that provides an incredible good performance even when dealing with a really huge amount of data. But there are also, some other alternatives poping around. One of these alternatives is Realm which is said to offer even better performance than Core Data, with a simpler syntax.

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