SceneKit Tutorial Part 1
We are going to start a new serie of tutorials about SceneKit, the framework that allows you to build and manipulate 3D objects in a 3D scene. SceneKit was introduced...
All posts by Geppy Parziale
Metal video processing for iOS and tvOS
Real-time video processing is a particular case of digital signal processing. Technologies such as Virtual Reality (VR) and Augmented Reality (AR) strongly rely on real-time video processing to extract semantic...
Network Reachability in Swift
Almost every mobile app needs to connect to the Internet at some point to retrieve data from a host or service or upload new data to it. However, the Internet...
Interactive View Animations in iOS 10
At the last WWDC, Apple introduced a new API to create interactive animations in iOS 10. In this post, I want to show you how to use this new API...
Convolutional Neural Networks in iOS 10 and macOS
Convolutional Neural Networks in iOS 10 and macOS In iOS 10 and macOS 10.12, Apple introduces new Convolutional Neural Network APIs in the Metal Performance Shaders Framework and the Accelerate...
Machine Learning for iOS
WWDC16 just ended and Apple left us with new amazing innovative APIs. This year speech recognition, proactive applications, machine learning, user intents, and neural networks have been the most frequent...
Replicator Layer
In this tutorial I am going to show you how to create a very interesting animation with replicator layers, instances of the CAReplicatorLayer class. After building so many apps and...
tvOS Focus Engine and Collection View
I recently did some consulting work for a new startup here in San Francisco. I built for them a couple of quite complex UI animations for an Apple TV app....
Capture Video with AVFoundation and Swift
AVFoundation allows you to capture multimedia data generated by different input sources (camera, microphone, …) and redirect them to any output destination (screen, speakers, render context, …). Some years ago,...
Metal: Blazing Fast Image Processing
Metal allows developers to perform graphics rendering and parallel computing directly on the GPU. Before Metal, OpenGL ES was the framework available on iOS to perform graphics rendering. Instead, parallel...
Custom View Controller Transitions and Storyboard
A few weeks ago, I wrote this post about the storyboard’s features introduced in iOS 9. In that post, I mentioned that you can now trigger a custom view controller...
Storyboard Reference, Strong IBOutlet, Scene Dock in iOS 9
In this tutorial, I want to show you some of the new Interface Builder in Xcode 7 features that I believe will change how you think about Storyboards. IBOutlets are...
UIStackView, Auto Layout and Core Animation
In iOS 9 Apple introduces a new UIStackView, a new class that leverages the power of Auto Layout. UIStackView allows you to lay out a collection of views in either...
LLDB Expression for Code Injection in Xcode
LLDB (http://lldb.llvm.org), described on the official webpage as a next generation, high-performance debugger, is the debugger that’s currently shipped with Xcode. Just a few years ago, LLDB replaced gdb, and...
Apple Watch Home Screen UI Animation
Apple Watch is almost here and everybody is waiting to play with this nice new toy. In the last two keynotes, Apple showed us Apple Watch and the amazing UI...
Swift 1.2 | Faster Executables
Swift 1.2 was announced a couple of weeks ago. Now, you can download it together with Xcode 6.3 beta 2 from the developer portal. As I read about the new...
Core Data Asynchronous Fetching in 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...
CoreData Batch Updates in 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...
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...
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....