15 - WWDC 2015 Developer Highlights for Xcode 7 + iOS 9 + Swift 2

Learn everything you need to know about changes for the Apple Developer program. One program to target all apps on iPhone, iPad, Mac, and Apple Watch. Apple continues to innovate with Swift and Xcode. Subscribe on iTunesPlease rate the Creative Person Podcast on iTunes. Post a question you have about the Apple Watch and I'll answer it in an upcoming episode. Development iOS 9 Supports all previous devicesiOS 9 download will be just over 1 GB, not 5 GB !Anyone can run apps on their iPhone (no need for paying for developer membership)Extended GameKit APIsGameplayKitRule-based games (agent + behavior)State machines for AIPathfinding ReplayKitRecord gameplay (or app usage)Playback and shareSocial interaction outside the gameModel I/O3D models (mesh)Realistic lighting of 3d objectsImport from industry standard file formatsLoading and exporting 3d assetsApp Thinning Reduce download sizeBitcode - support new features + optimizationsWill you need to test more platforms?On-demand resourcesNice to have, but getting your game out should be your first priorityXcode 7Improved asset collectionsLevel editor for SceneKit games (hopefully much better than prior support)Improved TestingUI TestingCode coverageSwift 2Open Source later in 2015Linux supportMicrosoft Swift port?Goal of Swift: Make your intent is clear from first lines of codeFaster compiler (bigger projects)Control flow improvementsif letguardif case (case pattern matching everywhere)for case Migrator to convert Xcode 6 to Xcode 7Should work better than the previous migratorsKeyword naming rules for functions and methods are the sameFelt divergent in Swift <= 1.2Protocol extensions allow functionality to be added to protocolsExposes logic to collection types that was missingPrevious collection functions were global, and didn’t appear in auto complete suggestions or APIOther topics“do while loop” is now the “repeat while loop”do infers scoping, which helps with memory releasing or new error handling logicguard - new way to reduce if let syntax indentationprintln is becoming printError handling (i.e. smarter exceptions)NSError APIs all changing in Swift 2try, catch, throwNo longer pass in error, instead it’ll propagate out using throws keywordExplicit  and easy to seeNot everything throws an exception by default – helps regular error handling logic’defer keyword (error recovery logic) Generics are part of Objective-CWill help make APIs more Swift-like and easier to use in SwiftImproved code suggestions and error messagesPrevious demos of improvements felt minimal – there are a lot of errors you can run intoSome of the changes demonstrated looked promising – time will tellBetter documentationRich text in QuickHelp (Markdown variant)Header view – get the high level view of your source files methodsImproved PlaygroundsResources folder (easy to add to)Source folder (add supplemental files to assist with code examples)Build workbooks with multiple pagesPermalink