Latest 5.0.0
Homepage https://github.com/ReactiveX/RxSwift
License MIT
Platforms ios 8.0, osx 10.9, watchos 3.0, tvos 9.0, requires ARC
Dependencies RxSwift
Authors

Miss Electric Eel 2016 RxSwift: ReactiveX for Swift

Travis CI platforms pod Carthage compatible Swift Package Manager compatible

Rx is a generic abstraction of computation expressed through Observable<Element> interface.

This is a Swift version of Rx.

It tries to port as many concepts from the original version as possible, but some concepts were adapted for more pleasant and performant integration with iOS/macOS environment.

Cross platform documentation can be found on ReactiveX.io.

Like the original Rx, its intention is to enable easy composition of asynchronous operations and event/data streams.

KVO observing, async operations and streams are all unified under abstraction of sequence. This is the reason why Rx is so simple, elegant and powerful.

I came here because I want to …

… understand
… install
… hack around
… interact
… compare
… understand the structure

RxSwift comprises five separate components depending on eachother in the following way:

┌──────────────┐    ┌──────────────┐
│   RxCocoa    ├────▶   RxRelay    │
└───────┬──────┘    └──────┬───────┘
        │                  │        
┌───────▼──────────────────▼───────┐
│             RxSwift              │
└───────▲──────────────────▲───────┘
        │                  │        
┌───────┴──────┐    ┌──────┴───────┐
│    RxTest    │    │  RxBlocking  │
└──────────────┘    └──────────────┘
  • RxSwift: The core of RxSwift, providing the Rx standard as (mostly) defined by ReactiveX. It has no other dependencies.
  • RxCocoa: Provides Cocoa-specific capabilities for general iOS/macOS/watchOS & tvOS app development, such as Binders, Traits, and much more. It depends on both RxSwift and RxRelay.
  • RxRelay: Provides PublishRelay and BehaviorRelay, two simple wrappers around Subjects. It depends on RxSwift.
  • RxTest and RxBlocking: Provides testing capabilities for Rx-based systems. It depends on RxSwift.
… find compatible
… see the broader vision
  • Does this exist for Android? RxJava
  • Where is all of this going, what is the future, what about reactive architectures, how do you design entire apps this way? Cycle.js – this is javascript, but RxJS is javascript version of Rx.

Usage

Here’s an example In Action
Define search for GitHub repositories … RxBlocking
let searchResults = searchBar.rx.text.orEmpty
    .throttle(.milliseconds(300), scheduler: MainScheduler.instance)
    .distinctUntilChanged()
    .flatMapLatest { query -> Observable<[Repository]> in
        if query.isEmpty {
            return .just([])
        }
        return searchGitHub(query)
            .catchErrorJustReturn([])
    }
    .observeOn(MainScheduler.instance)
… then bind the results to your tableview
searchResults
    .bind(to: tableView.rx.items(cellIdentifier: "Cell")) {
        (index, repository: Repository, cell) in
        cell.textLabel?.text = repository.name
        cell.detailTextLabel?.text = repository.url
    }
    .disposed(by: disposeBag)

Requirements

  • Xcode 10.2
  • Swift 5.0

For Xcode 10.1 and below, use RxSwift 4.5.

Installation

Rx doesn’t contain any external dependencies.

These are currently the supported options:

Manual

Open Rx.xcworkspace, choose RxExample and hit run. This method will build everything and run the sample app

CocoaPods

# Podfile
use_frameworks!

target 'YOUR_TARGET_NAME' do
    pod 'RxSwift', '~> 5'
    pod 'RxCocoa', '~> 5'
end

# RxTest and RxBlocking make the most sense in the context of unit/integration tests
target 'YOUR_TESTING_TARGET' do
    pod 'RxBlocking', '~> 5'
    pod 'RxTest', '~> 5'
end

Replace YOUR_TARGET_NAME and then, in the Podfile directory, type:

$ pod install

Carthage

Officially supported: Carthage 0.33 and up.

Add this to Cartfile

github "ReactiveX/RxSwift" ~> 5.0
$ carthage update

Carthage as a Static Library

Carthage defaults to building RxSwift as a Dynamic Library.

If you wish to build RxSwift as a Static Library using Carthage you may use the script below to manually modify the framework type before building with Carthage:

carthage update RxSwift --platform iOS --no-build
sed -i -e 's/MACH_O_TYPE = mh_dylib/MACH_O_TYPE = staticlib/g' Carthage/Checkouts/RxSwift/Rx.xcodeproj/project.pbxproj
carthage build RxAlamofire --platform iOS

Swift Package Manager

Create a Package.swift file.

// swift-tools-version:5.0

import PackageDescription

let package = Package(
  name: "RxTestProject",
  dependencies: [
    .package(url: "https://github.com/ReactiveX/RxSwift.git", from: "5.0.0")
  ],
  targets: [
    .target(name: "RxTestProject", dependencies: ["RxSwift", "RxCocoa"])
  ]
)
$ swift build

To build or test a module with RxTest dependency, set TEST=1.

$ TEST=1 swift test

Manually using git submodules

  • Add RxSwift as a submodule
$ git submodule add [email protected]:ReactiveX/RxSwift.git
  • Drag Rx.xcodeproj into Project Navigator
  • Go to Project > Targets > Build Phases > Link Binary With Libraries, click + and select RxSwift-[Platform] and RxCocoa-[Platform] targets

References

Latest podspec

{
    "name": "RxBlocking",
    "version": "5.0.0",
    "summary": "RxSwift Blocking operatos",
    "description": "Set of blocking operators for RxSwift. These operators are mostly intended for unit/integration testsnwith a couple of other special scenarios where they could be useful.nnE.g.nnWaiting for observable sequence to complete before exiting command line application.",
    "homepage": "https://github.com/ReactiveX/RxSwift",
    "license": "MIT",
    "authors": {
        "Krunoslav Zaher": "[email protected]"
    },
    "source": {
        "git": "https://github.com/ReactiveX/RxSwift.git",
        "tag": "5.0.0"
    },
    "requires_arc": true,
    "platforms": {
        "ios": "8.0",
        "osx": "10.9",
        "watchos": "3.0",
        "tvos": "9.0"
    },
    "source_files": [
        "RxBlocking/**/*.swift",
        "Platform/**/*.swift"
    ],
    "exclude_files": "RxBlocking/Platform/**/*.swift",
    "dependencies": {
        "RxSwift": [
            "~> 5"
        ]
    },
    "swift_versions": "5.0"
}

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