Article Status

The common swift (Apus apus) can travel at speeds over 100km/h. The Swift programming language — true to its name and namesake — is similarly fast-moving, frequently introducing new language features and syntax rules. As a result, some of our articles may become incorrect or outdated over time.

We do our best to keep things fresh, with new updates to existing articles made every week, and invite you to help us find and correct any mistakes you find by opening a new issue on our GitHub repository.

In the meantime, please consult the table below for guidance on when each of our articles was last updated, and which version of Swift it’s targeting:

"t.b.c." indicates that an article has not yet been translated to Swift
"n/a" notes that a Swift translation would not be useful or appropriate.
Article Swift Version Last Review
#pragma n/a October 1st, 2012
@ January 6th, 2020
AFNetworking 2.0 n/a September 16th, 2013
API Pollution in Swift Modules 5.0 February 18th, 2019
AVSpeech​Synthesizer 4.2 August 8th, 2018
Address​Book​UI 1.1 October 15th, 2012
Alamofire 1.1 August 4th, 2014
Apple Push Notification Device Tokens 5.1 September 16th, 2019
As We May Code July 7th, 2020
Associated Objects n/a February 10th, 2014
BOOL / bool / Boolean / NSCFBoolean n/a April 8th, 2013
Back Row n/a March 4th, 2013
Benchmarking t.b.c. May 19th, 2014
Bug Reporting n/a July 16th, 2018
Bundles and Packages 4.2 December 17th, 2018
C Storage Classes n/a March 18th, 2013
CAEmitter​Layer 5.0 July 8th, 2019
CFBag t.b.c August 27th, 2012
CFString​Transform 1.2 August 6th, 2012
CMDevice​Motion 4.2 September 12th, 2018
CMMotion​Activity 4.2 September 10th, 2018
Character​Set 4.2 December 12th, 2018
Clang Diagnostics n/a June 16th, 2014
Cloud​Kit 2.0 June 29th, 2015
Cocoa​Pods n/a May 26th, 2014
Configuration Profiles n/a April 7th, 2014
Contact Tracing 5.2 April 13th, 2020
Core Data Libraries & Utilities n/a August 12th, 2015
Core Location in iOS 8 1.2 June 24th, 2015
Core​Graphics Geometry Primitives 5.0 April 22nd, 2019
Cross-Pollination April 22nd, 2020
Custom​Playground​Display​Convertible 4.2 November 12th, 2018
Dark Mode on iOS 13 5.1 September 2nd, 2019
Date​Components 4.2 October 10th, 2018
Device Identifiers and Fingerprinting on iOS 5.1 October 31st, 2019
Dictionary Services 4.2 March 10th, 2014
Empathy n/a March 17th, 2014
Equality n/a August 26th, 2013
Equatable and Comparable 4.2 December 19th, 2018
Expressible​ByString​Interpolation 5.0 February 4th, 2019
Extended File Attributes t.b.c. January 20th, 2014
File​Manager 4.2 October 29th, 2018
Formatter 5.1 July 15th, 2019
GPUImage n/a May 6th, 2013
Guided Access 5.0 April 15th, 2019
Hashable / Hasher 4.2 August 13th, 2018
IBAction / IBOutlet / IBOutlet​Collection t.b.c. May 5th, 2014
IBInspectable / IBDesignable 1.0 February 2nd, 2015
Identifiable 5.1 August 26th, 2019
Image Resizing Techniques 5.0 May 6th, 2019
Inter-Process Communication t.b.c. October 17th, 2014
Java​Script​Core 5.0 February 25th, 2019
KVC Collection Operators t.b.c. August 12th, 2015
Key-Value Observing t.b.c. October 7th, 2013
Key​Value​Pairs 5.1 November 19th, 2019
Language Server Protocol n/a November 5th, 2018
Launch Arguments &
Environment Variables		 n/a October 21st, 2013
Locale 4.2 November 28th, 2018
Localized​Error, Recoverable​Error, Custom​NSError 5.0 March 18th, 2019
Long Live Cocoa 1.0 January 12th, 2015
MKGeodesic​Polyline 2.0 November 12th, 2015
MKLocal​Search 2.0 November 12th, 2015
MKTile​Overlay,
MKMap​Snapshotter &
MKDirections		 2.0 November 12th, 2015
Map​Kit JS 5.0 March 11th, 2018
Message-ID and Mail.app Deep Linking on iOS and macOS 5.1 November 4th, 2019
Method Swizzling n/a January 28th, 2015
Metric​Kit 5.1 October 21st, 2019
Mirror / Custom​Reflectable / Custom​Leaf​Reflectable 4.2 November 14th, 2018
Multipeer Connectivity t.b.c. December 9th, 2013
NLLanguage​Recognizer 4.2 August 6th, 2018
NSAssertion​Handler n/a February 25th, 2013
NSCache 2.2 April 10th, 2016
NSCalendar Additions 1.2 March 16th, 2015
NSCalendar​Unit​Year 2.0 September 9th, 2015
NSCoding / NSKeyed​Archiver 2.0 September 15th, 2015
NSData​Asset 4.2 August 26th, 2018
NSData​Detector 4.2 August 29th, 2018
NSError n/a October 14th, 2013
NSExpression 2.0 September 8th, 2015
NSFast​Enumeration / NSEnumerator n/a July 1st, 2013
NSHash​Table & NSMap​Table 2.0 September 11th, 2015
NSHipster Quiz #1 n/a April 22nd, 2013
NSHipster Quiz #2 n/a June 12th, 2013
NSHipster Quiz #3 n/a July 31st, 2013
NSHipster Quiz #4 n/a October 28th, 2013
NSHipster Quiz #5 n/a May 12th, 2014
NSHipster Quiz #6 n/a June 3rd, 2014
NSHipster Quiz #7 n/a June 9th, 2015
NSHipster Quiz #8 n/a June 14th, 2016
NSIncremental​Store 1.1 September 8th, 2015
NSIndex​Set 2.0 September 8th, 2015
NSLinguistic​Tagger 2.0 September 8th, 2015
NSLocalized​String t.b.c. January 21st, 2013
NSNotification &
NSNotification​Center		 2.0 September 8th, 2015
NSOperation 2.0 September 15th, 2015
NSOrdered​Set 2.0 September 15th, 2015
NSPredicate 4.2 January 9th, 2019
NSRange n/a January 13th, 2014
NSScanner 4.2 March 2nd, 2015
NSSecure​Coding 1.1 April 15th, 2013
NSSort​Descriptor 1.1 July 24th, 2012
NSURL /
NSURLComponents		 2.0 September 9th, 2015
NSURLCache 1.1 February 11th, 2013
NSURLProtocol n/a November 5th, 2012
NSUUID /
CFUUIDRef /
UIDevice -unique​Identifier /
-identifier​For​Vendor		 1.1 June 24th, 2013
NSUndo​Manager 1.0 December 15th, 2014
NSValue t.b.c. January 28th, 2013
NS_ENUM & NS_OPTIONS n/a November 19th, 2012
Namespacing n/a February 24th, 2014
Network Link Conditioner n/a September 9th, 2013
Never 4.2 July 30th, 2018
Object Subscripting n/a June 17th, 2013
Objective-C Direct Methods December 16th, 2019
Objective-C Documentation n/a August 5th, 2013
Option​Set 4.2 November 7th, 2018
Optional, throws, Result, async/await 5.0 April 29th, 2019
PHImage​Manager 2.0 September 15th, 2015
Password Rules / UIText​Input​Password​Rules 4.2 July 23rd, 2018
Quick Look Debugging 1.2 March 30th, 2015
Raw​Representable 5.1 January 29th, 2020
Reactive​Cocoa n/a February 18th, 2013
Reader Submissions -
New Year's 2013		 n/a January 1st, 2013
Reader Submissions -
New Year's 2014		 n/a January 1st, 2014
Reader Submissions -
New Year's 2015		 1.0 January 1st, 2015
Reader Submissions -
New Year's 2016		 2.1 January 4th, 2016
Regular Expressions in Swift 5.0 February 11th, 2019
Search Kit 2.0 November 24th, 2015
Secret Management on iOS 5.1 November 12th, 2019
Static and Dynamic Callable Types in Swift 5.2 February 12th, 2020
Stewardship n/a January 27th, 2014
Swift & the Objective-C Runtime 2.0 September 19th, 2015
Swift 1.2 1.2 February 9th, 2015
Swift API Availability 5.1 December 10th, 2019
Swift Code Formatters 5.0 May 20th, 2019
Swift Collection Protocols 1.2 February 23rd, 2015
Swift Default Protocol Implementations 1.2 September 2nd, 2014
Swift Development with Visual Studio Code 5.2 November 19th, 2018
Swift Documentation 4.2 July 11th, 2018
Swift GYB 4.2 July 9th, 2018
Swift Import Declarations 4.2 January 7th, 2019
Swift Literals 4.2 August 18th, 2014
Swift Logging 5.2 March 26th, 2020
Swift Operators 4.2 October 3rd, 2018
Swift Program Distribution with Homebrew n/a December 3rd, 2018
Swift Property Observers 4.2 August 20th, 2018
Swift Property Wrappers 5.1 June 24th, 2019
Swift System Version Checking 4.0 October 6th, 2014
Swift​Syntax 4.2 October 22nd, 2018
Swift​UI Previews on macOS Catalina and Xcode 11 5.1 October 14th, 2019
Temporary Files 4.2 March 3rd, 2014
Text​Output​Stream 4.2 January 21st, 2019
The Death of Cocoa 1.0 December 29th, 2014
Time​Interval, Date, and Date​Interval 4.2 October 8th, 2018
Type Encodings n/a February 4th, 2013
UIAccessibility n/a September 10th, 2012
UIActivity​View​Controller 4.2 December 5th, 2018
UIAlert​Controller 1.0 September 30th, 2014
UIAppearance 2.0 September 8th, 2015
UIApplication​Delegate launch​Options t.b.c. December 16th, 2013
UICollection​View 2.0 September 9th, 2015
UIField​Behavior 4.2 September 24th, 2018
UIKey​Command 2.0 July 27th, 2015
UILocalized​Indexed​Collation 2.0 September 8th, 2015
UIMenu​Controller 2.0 September 8th, 2015
UIPrint​Interaction​Controller 1.0 November 17th, 2014
UISplit​View​Controller 4.2 September 26th, 2018
UIStack​View 5.0 July 1st, 2019
UITable​View​Header​Footer​View 5.0 April 8th, 2019
UIText​Checker 4.2 April 25th, 2016
Unit Testing n/a May 27th, 2013
Unmanaged 1.2 April 13th, 2015
Value​Transformer 4.2 October 17th, 2018
Void 4.2 October 31st, 2018
WKWeb​View 4.2 July 25th, 2018
WWDC 2019 5.🤔 June 12th, 2019
WWDC 2020 June 26th, 2020
Watch​Kit 1.0 December 1st, 2014
XCPlayground 1.2 May 11th, 2015
XCTest​Case /
XCTest​Expectation /
measure​Block()		 1.2 June 25th, 2015
Xcode Build Configuration Files 5.2 February 27th, 2020
Xcode Key Bindings & Gestures n/a September 30th, 2013
Xcode Plugins n/a April 14th, 2014
Xcode Snippets n/a September 2nd, 2013
Xcode​Kit and Xcode Source Editor Extensions 5.0 March 25th, 2019
__attribute__ n/a January 14th, 2013
bless November 25th, 2019
guard & defer 4.2 August 1st, 2018
iCloud 1.1 April 1st, 2013
iOS 12 4.2 September 17th, 2018
iOS 13 5.1 September 23rd, 2019
iOS 7 2.0 September 12th, 2015
iOS 8 2.0 September 12th, 2015
iOS 9 2.0 June 22nd, 2015
instancetype n/a December 10th, 2012
macOS Accessibility Keyboard n/a August 12th, 2019
macOS Character Viewer 4.2 December 10th, 2018
macOS Dynamic Desktop 4.2 October 1st, 2018
nil / Nil / NULL / NSNull n/a January 7th, 2013
numeric​Cast(_:) 4.2 October 15th, 2018
rand(3) / random(3) / arc4random(3) / et al. t.b.c. August 12th, 2013
simctl n/a November 26th, 2018
swift-sh 4.2 January 14th, 2019
xctool n/a November 4th, 2013
Pay 1.0 December 8th, 2014