This tool lets you see the effects of changes or additions to code as you type, without going through the time-consuming rigmarole of running the code through the compiler and executing it. You can experiment with Swift code in "Playgrounds."One of Swift's most interesting features is an interactive environment called a Playground. And don't forget: Apple's app stores won't accept apps built with Swift until it first releases Yosemite and iOS 8.ĥ. While it may well be worth coding in Swift to familiarize yourself with the language, to do so you'll need to use Xcode 6 beta and the iOS 8 SDK (also in beta). Apple is still working on it, and it's highly likely that new features will be added over the coming months. Swift is incomplete. The language that's available today isn't the finished product. There will inevitably be performance differences, as the two languages aren't identical after all, but don't expect significant differences.Ĥ. Although the two languages are different, they're not that different both target the same Cocoa and Cocoa Touch APIs (for OS X and iOS, respectively), both are statically typed languages and both use the same LLVM compiler as well. Swift isn't that fast. Despite the name, Swift is unlikely to result in applications that run much faster than applications written in Objective-C. This guarantees that something will run at the end of the statement even if none of the possibilities in the statement are satisfied.ģ. In addition, switch statements must include a default statement. For starters, programmers must include brace brackets to open and close "If" statements, which prevents bugs such as the SSL "goto fail" error.
Swift should be a safe(r) language. Apple has made an effort to make Swift safe in a variety of subtle ways. That may make Swift attractive if you've already built a considerable skill base in Objective-C, too.Ģ. There's no problem with writing new modules in Swift that interoperate with existing Objective-C code bases. That said, Swift is compatible with existing Objective-C libraries.
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