All new in Swift 4

Swift is a powerful and visceral programming language for macOS, iOS, watchOS, and tvOS. The syntax use is concise yet expressive, Swift code is safe by design, still, it produces software that runs lightning-fast.

Swift 4 on comparing with Swift 3, deliver greater robustness and stability, providing source code compatibility with Swift 3, making improvements to the standard library, and adding features like smart key paths and serialization.

Source Compatibility Modes

You can use the new Swift 4 compiler with three different modes:

· Swift 3 mode is the default for existing code and will build source code that built with the Swift 3 compiler

· Swift 4 mode enables you to use new features and performance optimizations of Swift 4, some of which may require migration, making it easier to migrate than the previous transition from Swift 2.2 to Swift 3.

· Mixed mode allows you to take advantage of interoperability between binaries built with the same compiler. This helps developers who have projects that mix packages written with Swift 3 with packages written with Swift 4, as long as all packages are built using the Swift 4 compiler. This allows developers to gradually migrate specific portions of their code to Swift 4 over time.

New Features in Swift 4

· Faster, easier to use Strings that retain Unicode correctness and add support for creating, using and managing substrings

· Smart key paths for type-safe, efficient, extensible key value coding for Swift types

· Enhancements to creating and manipulating Dictionary and Set types

· Extends support of archival and serialization to struct and enum types and enables type-safety for serializing to external formats such as JSON and plist

· Enforced exclusive access to memory

Mobiloitte is the leading iOS app development comapny delivering high-performance and engaging iOS applications to different business verticals, having in-depth iOS Swift Development Expertise and knowledge.Mobiloitte is capable in making the use of latest swift technology to combine powerful type inference, modern pattern and lightweight syntax to convert complex app ideas in a concise manner.