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…
Tag: ios
Core Data in Swift Tutorial (Part 3)
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…
Core Data in Swift Tutorial (Part 2)
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…
Core Data in Swift Tutorial (Part 1)
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…
Taking control of the iPhone camera in iOS 8 with Swift (Part 1)
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…
Using Equatable and NilLiteralConvertible to re-implement Optionals in Swift (Part 2)
This post updated December 6, 2014 to reflect changes in Xcode 6.2 A few weeks ago I did a little thought experiment on how we might re-implement Swift’s optional type by using the Swift enum. If you haven’t read that yet, you can read it here. In this post, we’re going to push a little…
Re-implementing Optionals using Swift’s powerful enum type.
This post updated December 6, 2014 to reflect changes in Xcode 6.2 If you’ve been messing with Swift much lately, you may have noticed that enum’s do much more than they did in Objective-C, or in most other languages for that matter. In the WWDC videos discussing Swift, one of the presenters mentions that Optionals…
Making a POST request in Swift
This post updated September 16 for Xcode 6 GM Let’s say you’re working on an iOS app where you need to pass data to a server as JSON. Just about every app that interacts with a server does this, and almost always there is a login API call. For the purposes of this tutorial, I’m…
Swift: “fatal error: unexpectedly found nil while unwrapping an Optional value” errors in Swift
fatal error: unexpectedly found nil while unwrapping an Optional value Have you seen this yet working with Swift yet? If so, you’re not alone. In this post I’m going to dig in to what this means, and explain a bit about optionals in Swift. For those of you who are experienced programmers and have arrived…
Developing iOS Apps Using Swift Part 5 – Async image loading and caching
This section completely updated to reflect changes in Xcode 6.3, as of April 16, 2015 In parts 1 through 4 we went over some basics of Swift, and set up a simple example project that creates a Table View and a puts some API results from iTunes inside of them. If you haven’t read that…