![]() Make sure you do this setting by starting of new project because many methods will change. But if you want to do legacy code (Swift 2.3) then you have to select Yes (Swift 2.3). If you want to work with new project and you want to work with Legacy code (Swift 2.3) or 3.0 then you can do settings from build settings as follows :ĭefault Setting is No (Swift 3). You will get source changes to be able to build your project using Swift 3 and take advantage of all the new features in Xcode 8.0. ![]() Use Swift 2.3 Modifies your project to enable the Use Legacy Swift build setting and provides source changes to be able to build against the new SDKs.The assistant can also be invoked manually from the menu Edit -> Convert -> To Current Swift Syntax… Swift Apple revealed Swift to the public at the 2014 Worldwide Developers Conference. Also, aside from its object-oriented capabilities, Objective-C also offers dynamic runtime. The object syntax is courtesy of Smalltalk while C provided the non-object one. If you already having a project with Swift 2.2 language support with Xcode 7.3.1 and you open the project in Xcode 8.0 then, you will be prompted for the migration assistant to do a migration pass. Objective-C is a combination of two languages Smalltalk and C. Xcode 8.0 is released with Swift 3 and Swift 2.3 compatibility.
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