RxSwift 5 is a mostly source-compatible release targeting the Swift 5 compiler.

Xcode 10.2 is the minimum supported version (or Swift 5 on Linux).

If you're using Xcode 10.1 and below, please use RxSwift 4.5.

• Relays have been moved to a separate framework - RxRelay, and can be used without RxCocoa. #1924
• TimeInterval has been deprecated in favor of DispatchTimeInterval. For example - throttle(1.2) would change to throttle(.milliseconds(1200)), while throttle(3) would change to throttle(.seconds(3)). #1472
• Variable is now entirely deprecated. #1922
• do now provides additional "after" closures. For example, do(onNext:) and do(afterNext:). #1898
• bind(to:) now supports multiple observers (e.g. bind(to: observer1, observer2)). #1702
• Changes the return type of ObservableType.toArray to Single. #1923
• Adds compactMap. #1925
• Deprecate Completable.merge in favor of Completable.zip. #1929 #1931
• RxSwift can be built as a Static Library using Carthage 0.33 and up. #1940

Anomalies

• SubjectType.SubjectObserverType has been renamed to SubjectType.Observer. #1950
• The S associated type has been renamed to Subject where applicable. #1950
• The S generic constraint on SharedSequence has been renamed to SharingStrategy. #1951
• The E associated type on ObservableConvertibleType and ObserverType have been renamed to Element. #1945
• The C and S associated types have been renamed to Collection and Sequence accordingly. #1949
• Renamed ElementType associatedtype to Element. #1945
• Renamed TraitType associatedtype to Trait. #1945
• Make RxMutableBox supported on Linux in Swift 5. #1917
• Fix incorrect assignment to Thread.threadDictionary on Linux. #1912
• combineLatest of an empty array now completes immediately. #1879
• Add resultsSelector missing closure labels for some overloads of combineLatest & zip.