Function Currying in Swift The concept of currying is that instead of accepting multiple arguments, a function accepts only one, and returns a function which acepts the remaining arguments. The returned function will also accept only one argument, and returns another function. This process continues until all arguments are exhausted and we are left only with a single return value.…
Thoughts on Functional Programming in Swift Like most of you, I have to use Objective-C at my day job. I could only craft my Swift skills at night. Swift is not a purely functional language. It can be use imperatively because all frameworks from Apple are written in Objective-C at the time of writing. However, it is also functional, learning…
CAShapeLayer is a specialized subclass of CALayer that draws itself using the shape you define via the path property. path is an instance of CGPath. We could leverage the convenient UIBezierPath APIs to create a path, and then retrieve the CGPath from it. Besides all the animatable properties inherited from CALayer, there are other animatable properties that let you control…
The big news in the Swift community is the release of Swift 1.2, featuring some awesome features. Apple wrote about that a bit here, this was before they released Xcode 6.3 Beta 2, which came out today. But it contains most of the major language changes. Xcode 6.3 Beta 2 First of all, Xcode itself has changed to allow for…
“Should I learn Objective-C or Swift first?" I get asked this question a lot. Sometime's people will also ask about learning C or C++ first. So, I want to take a moment and give you the low-down on how I feel as a professional iOS & Mac developer, six months after Swift’s introduction. If this is your first time here,…
In this post we're going to discuss migrations in Core Data. This is part three of a tutorial series covering the usage of Core Data in Swift to write iOS apps with persistence. While I think you can benefit strictly from reading this post, it may be easier to follow along if you go back and read Core Data in…
This post compatible with Xcode 6.3 Beta, Updated on February 16, 2014 This is part three of a tutorial series covering the usage of Core Data in Swift to write iOS apps with persistence. If you haven't read part one yet, read that first. If you really want to get your feet wet, my Swift book which is now available…
This post compatible with Xcode 6.3, Updated on February 16, 2015 This is part two of a tutorial series covering the usage of Core Data in Swift to write iOS apps with persistence. If you haven't read part one yet, read that first. If you really want to get your feet wet, my Swift book which is now available for…
This post compatible with Xcode 6.3 Beta, Updated on February 16, 2015 Don't have 6.3 yet? Make sure to download it here using your iOS Developer account. Core Data is the de facto standard way to persist and manage data in both iPhone and Mac applications, and with Swift it's a bit easier. So it's only natural that we should…
Updated on September 20, 2014 for Xcode 6 GM Using the AVFoundation API, we are going to set up a capture session and make an app that allows us to use all the new fine-grained controls added to iOS 8. This includes manually controlling focus, exposure, and ISO. First off, we just need to set up a basic camera preview.…