Welcome to Swift
You most likely have the tools you need already installed to develop your iOS or OS X apps in Swift rather than Objective-C. For iOS apps, you need at least Xcode 6.0; for OS X development, you need at least Xcode 6.1. If you’re not running the right version, upgrade using the Mac App Store, or download a version from the Apple Developer Center at http://developer.apple.com.
Swift’s Goals
When introducing Swift to the world, Apple had three goals for the new language: It had to be safe, modern, and powerful.
Safe
Swift added and removed programming concepts to make it a safer language than Objective-C. In the new additions ...
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