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Core Data Asynchronous Fetching in iOS 8 and Swift

In my previous post, I displayed a new Core Data feature that allows developers to perform batch updates directly on the Persistent Store. This time, I’m going to show how to perform asynchronous fetches, a feature that developers have desired for a long time, but has finally become available in iOS 8 (and OS X 10.10 Yosemite).

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Core Data Batch Updates in iOS 8 and Swift

Core Data, one of the most important Cocoa frameworks, received new interesting functionalities in iOS 8 and OS X 10.10.

Today, I am going to show you how to perform batch updates of the data contained in the Persistent Store. This will allow you to modify one or more properties of your entities with no need of loading the data into the Managed Object Context. Instead, batch updates are directly performed in the Persistent Store.

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Singletons in Swift

In this post, I will demonstrate one particular way of creating singletons in Swift. But, before starting, let me just say: Swift is a very powerful programming language that allows developers to construct the same functionality in multiple ways. Therefore, the following example is just one way of building a singleton in Swift.

Generally, I discourage the use of singletons, as instantiating an object that will last forever is not good design. Instead, I prefer letting ARC do the memory management and letting ARC decide when to release an object or keep it alive. Additionally, there’s always an alternative way to build what you are trying to do with a singleton.

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Objective-C selectors in Swift

I was building new exercises in Swift—Apple’s new development language—for our upcoming iOS training class in San Francisco, and when combining Swift and Cocoa Touch, I discovered something really interesting.

In particular, for this tutorial, I will examine methods that require a selector as the argument, such as: performSelector:, respondsToSelector: or performSelector:withObject:afterDelay:.

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Teaching Swift—Apple’s new development language

This year, the WWDC was amazing. The shear amount of new stuff is overwhelming, and I still can’t believe that most of my wish list is now covered.

This year’s biggest surprise, however, which I was not really expecting (I guess nobody was), was Apple’s introduction of a new programming language—Swift. But now, Swift is here, and we have to deal with it.

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WWDC 2014 wish list for developers

Every year, before WWDC, there’s a lot of buzz. Transforming technologies are on our minds, and everyone is asking—what’s going to be the next big thing, as technology and change are seemingly synonymous.

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UIKit Dynamics, Core Animation Layers and Autolayout Constraints

Recently, we have been busy with interesting consulting work, and have not had a lot of time to write new blog posts. We appreciate the many emails, asking for more, but we have been fighting time and finalizing projects. Now, however, one of our projects is nearly finished. So, I found a couple of hours to write this post about combining UIKit Dynamics and other UIKit APIs.

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Biometrics: identity theft or individual security?

The iPhone 5s Touch ID™ has changed the standard for smartphone security. Apple’s innovative technology, which was initiated by the purchase of AuthenTech in 2012, enables instant access and personalized security, suddenly making it feel antiquated and overly involved to remember and enter a password into our smartphone.

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