Replacement for Apple's Reachability re-written in Swift with closures

Last update: Jun 17, 2022


Reachability.swift is a replacement for Apple's Reachability sample, re-written in Swift with closures.

It is compatible with iOS (8.0 - 12.0), OSX (10.9 - 10.14) and tvOS (9.0 - 12.0)

Inspired by

Supporting Reachability.swift

Keeping Reachability.swift up-to-date is a time consuming task. Making updates, reviewing pull requests, responding to issues and answering emails all take time.

Please consider sponsoring me, it's a great way to say thanks!

If you're an iOS developer who's looking for a quick and easy way to create App Store screenshots, please try out my app Screenshot Producer

Devices  Layout Copy Localize Export      

And don't forget to the repo. This increases its visibility and encourages others to contribute.

Thanks Ash

Got a problem?

Please read before raising an issue.



Just drop the Reachability.swift file into your project. That's it!


CocoaPods is a dependency manager for Cocoa projects. To install Reachability.swift with CocoaPods:

  1. Make sure CocoaPods is installed.

  2. Update your Podfile to include the following:

    pod 'ReachabilitySwift'
  3. Run pod install.

  1. In your code import Reachability like so: import Reachability


Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks. To install Reachability.swift with Carthage:

  1. Install Carthage via Homebrew
$ brew update
$ brew install carthage
  1. Add github "ashleymills/Reachability.swift" to your Cartfile.

  2. Run carthage update.

  3. Drag Reachability.framework from the Carthage/Build/iOS/ directory to the Linked Frameworks and Libraries section of your Xcode project’s General settings.

  4. Add $(SRCROOT)/Carthage/Build/iOS/Reachability.framework to Input Files of Run Script Phase for Carthage.

  5. In your code import Reachability like so: import Reachability

Swift Package Manager (SPM)

The Swift Package Manager is a tool for automating the distribution of Swift code and is integrated into the swift compiler. To integrate using Apple's Swift package manager from xcode :

  1. File -> Swift Packages -> Add Package Dependency...

  2. Enter package URL :, choose the latest release

Example - closures

NOTE: All closures are run on the main queue.

//declare this property where it won't go out of scope relative to your listener
let reachability = try! Reachability()

reachability.whenReachable = { reachability in
    if reachability.connection == .wifi {
        print("Reachable via WiFi")
    } else {
        print("Reachable via Cellular")
reachability.whenUnreachable = { _ in
    print("Not reachable")

do {
    try reachability.startNotifier()
} catch {
    print("Unable to start notifier")

and for stopping notifications


Example - notifications

NOTE: All notifications are delivered on the main queue.

//declare this property where it won't go out of scope relative to your listener
let reachability = try! Reachability()

//declare this inside of viewWillAppear

     NotificationCenter.default.addObserver(self, selector: #selector(reachabilityChanged(note:)), name: .reachabilityChanged, object: reachability)
      try reachability.startNotifier()
      print("could not start reachability notifier")


@objc func reachabilityChanged(note: Notification) {

  let reachability = note.object as! Reachability

  switch reachability.connection {
  case .wifi:
      print("Reachable via WiFi")
  case .cellular:
      print("Reachable via Cellular")
  case .unavailable:
    print("Network not reachable")

and for stopping notifications

NotificationCenter.default.removeObserver(self, name: .reachabilityChanged, object: reachability)

Want to help?

Got a bug fix, or a new feature? Create a pull request and go for it!

Let me know!

If you use Reachability.swift, please let me know about your app and I'll put a link here… and tell your friends!

Cheers, Ash

  • 1. app get rejected because of ipv6 issue

    hi! i created one iOS app with swift programming it get rejected 4 time because of ipv6 problem m not sure that it is because of Network-Reachabilty. m also using alamofire , and is also has network rateability class today i checked with breakpoint but its not going there its checking internet connectivity only with NetworkReachability. any solution or any idea why my app is getting rejected.

    they send me this

    Performance - 2.1

    We discovered one or more bugs in your app when reviewed on the iPhone running iOS 9.3.2 on Wi-Fi.

    Specifically, we were still unable to login to the app.

    We've attached screenshots for your reference.

    Next Steps

    Please run your app on a device to identify the issue(s), then revise and resubmit your app for review.

    Apps are reviewed on an IPv6 network. Please ensure that your app supports IPv6 networks, as IPv6 compatibility is required.

    For additional information about supporting IPv6 Networks, please refer to Supporting IPv6 DNS64/NAT64 Networks and Supporting IPv6-only Networks.

    For a networking overview, see About Networking.

    If we misunderstood the intended behaviour of your app, please reply to this message in Resolution Center to provide information on how these features were intended to work.

    For new apps, uninstall all previous versions of your app from a device, then install and follow the steps to reproduce the issue(s). For updates, install the new version as an update to the previous version, then follow the steps to reproduce the issue(s).

    Reviewed by Aishly at 2016-07-20 09:15
  • 2. No such module 'ReachabilitySwift


    i am using xcode 9.1 and swift 3.2 always getting an error:

    No such module 'ReachabilitySwift

    in podfile: pod 'ReachabilitySwift'

    kindly let me know what can i do ... always getting an error

    Reviewed by mohamamdkalim at 2017-11-14 10:56
  • 3. ReachabilitySwift 3.0 doesn't update with Cocoapods

    I've updated XCode 8.0 with Swift 3, and I can't update ReachabilitySwift 3.0

    [!] Unable to satisfy the following requirements:

    • ReachabilitySwift (~> 3) required by Podfile

    None of your spec sources contain a spec satisfying the dependency: ReachabilitySwift (~> 3).

    You have either:

    • out-of-date source repos which you can update with pod repo update.
    • mistyped the name or version.
    • not added the source repo that hosts the Podspec to your Podfile.

    Note: as of CocoaPods 1.0, pod repo update does not happen on pod install by default.

    Reviewed by davilinho at 2016-09-14 11:10
  • 4. Reachability crashes sometime for iOS 7 and 8

    This is the error report I am getting from fabric: Reachability.swift line 0 partial apply forwarder for imDown.Reachability.(startNotifier (imDown.Reachability) -> () -> Swift.Bool).(closure #1)

    and here is the code I am using:

        let reachability = Reachability.reachabilityForInternetConnection()
        NSNotificationCenter.defaultCenter().addObserver(self,selector: Selector("handleNetworkChange:"),name: ReachabilityChangedNotification, object: reachability)
        if !reachability.isReachable() && !self.isShowingNetworkAlert{
            println("Not reachable")
            self.isShowingNetworkAlert = true
            UIApplication.sharedApplication().keyWindow?.rootViewController?.presentIMDAlertWith(title: "CAN'T CONNECT", subtitle: "", body: "Check network connection and try again.", confirmation: "Sounds good!", completionHandler: {self.isShowingNetworkAlert = false})
    Reviewed by aTylerRice at 2015-08-05 22:34
  • 5. Swift 3 / iOS 10

    Please check out the ios10 feature branch ( which has been updated to Swift 3

    Please log any issues and create PRs to that branch

    Reviewed by ashleymills at 2016-06-15 13:48
  • 6. Using Cocoapods to install Reachability 4.0 doesn't work

    Hey, after I updated Cocoapods and the repos (pod repo update), I was unable to install Reachability :(.

    I tried: pod 'ReachabilitySwift' and pod 'ReachabilitySwift' , '~> 3.0'

    the response:

    [!] Error installing ReachabilitySwift
    [!] /usr/bin/git clone /var/folders/1w/rbhn9wvn2qn6dghyrq6zmf5r0000gn/T/d20170923-60074-q1ic10 --template= --single-branch --depth 1 --branch v3
    Cloning into '/var/folders/1w/rbhn9wvn2qn6dghyrq6zmf5r0000gn/T/d20170923-60074-q1ic10'...
    warning: Could not find remote branch v3 to clone.
    fatal: Remote branch v3 not found in upstream origin

    And after i've read the README again, i founded the Warning, that ReachabilitySwift has been renamed to Reachability. So I tried pod 'Reachability' but this installs a definitely other Repo with versionnumber 3.2 written in Obj-C.

    What did I wrong? tjarbo :)

    Reviewed by tjarbo at 2017-09-23 16:44
  • 7. DSL Error with Cocoapods 1.0.0.beta.4

    Podfile (simplified a bit)

    source ''
    platform :ios, '8.0'
    pod 'ReachabilitySwift', git: ''

    I receive

    [!] Unable to find a specification for 'ReachabilitySwift'.
    [!] Unable to load a podspec from `ReachabilitySwift.podspec`, skipping:

    I just upgraded to 1.0.0.beta.4, and everything was working for in 0.39.0, so I guess their required format changed?

    Reviewed by bclymer at 2016-02-25 13:47
  • 8. Crash on


    I have following crash in my crashlytics logs:

    Crashed: EXC_BAD_ACCESS KERN_INVALID_ADDRESS at 0x00000004

    Thread : Crashed: 0 libswiftCore.dylib 0x0091b254 _ZL40usesNativeSwiftReferenceCounting_unownedPKv + 95 1 libswiftCore.dylib 0x0091b2f5 swift_unknownWeakRetain + 84 2 libswiftCore.dylib 0x0091b2f5 swift_unknownWeakRetain + 84 3 MyProject 0x000fdf68 partial apply forwarder for MyProject.Reachability.(startNotifier (MyProject.Reachability) -> () -> Swift.Bool).(closure #1) (Reachability.swift) 4 libdispatch.dylib 0x3af883ef _dispatch_source_invoke + 262 5 libdispatch.dylib 0x3af8bc71 _dispatch_queue_drain + 412 6 libdispatch.dylib 0x3af88c6f _dispatch_queue_invoke + 42 7 libdispatch.dylib 0x3af8c5f1 _dispatch_root_queue_drain + 76 8 libdispatch.dylib 0x3af8c8dd _dispatch_worker_thread2 + 56 9 libsystem_pthread.dylib 0x3b0b7c17 _pthread_wqthread + 298

    Hope you can help about the problem.

    Reviewed by gnhn at 2015-05-18 07:08
  • 9. from Objective-c class - use of undeclared identifier 'Reachability'

    Before version 3 I could use Reachibility class within objc code.

    now, I get this error. I install with Cocoapods 1.0.1, use

    @import ReachabilitySwift; in my .m file but it fails to compile.

    Reviewed by mime29 at 2016-09-16 08:01
  • 10. Simpler usage?

    The examples in the documentation seem quite code-heavy, and focuses on reachability state changes. In a reachability library I used before (IJReachability, which is no longer updated), I was able to to do this:

    if IJReachability.isConnectedToNetwork() {
    } else {
        print("not connected")

    ... for a one-off check on reachability. Is something similar possible with Reachability.swift ?

    Reviewed by cannyboy at 2016-01-08 11:06
  • 11. Is it possible to check if WiFi is connected but there is no internet connection?

    I don't know if this is possible but here's my question -

    1. When the WiFi is connected & the internet is ON then Yellow Light glows on Router
    2. When the WiFi is connected & the Internet is OFF then Red Light glows on Router

    So is it possible to distinguish the 2nd case or is it just the same as when Internet is not reachable?

    Reviewed by deadcoder0904 at 2018-09-20 05:42
  • 12. Reachability could not detect cellular network on iOS version 14.8.1

    reachability could not be detected when we are on cellular network it says network is unreadable, tested on safari it is working fine, but reachability class won't give any indication for network, this is particularly coming on iOS version 14.8.1, please could you check this once.

    Reviewed by GurpalRajput at 2022-02-08 10:39
  • 13. xCode13 issue

    Hi Guys,

    I use this library on Carthage and I have this issue on xcode13

    Failed to build module 'Reachability'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 5.4 (swiftlang-1205.0.26.9 clang-1205.0.19.55)', while this compiler is 'Apple Swift version 5.5 (swiftlang-1300.0.31.1 clang-1300.0.29.1)'). Please select a toolchain which matches the SDK.

    Thank you


    Reviewed by pjcau at 2021-10-01 11:42
  • 14. fix: don't build for distribution to avoid .swiftinterface bugs

    This avoids Right now, building with module stability doesn't actualy provide any benefits to the project; as soon as you are in a situation where the .swiftinterface actually gets used, it's invalid.

    An alternative fix here would be to rename the class, but that is a larger breaking change.

    Reviewed by thedavidharris at 2021-07-13 18:20
  • 15. Query around connections under other interfaces i.e. USB, Bluetooth, etc

    Does Reachability (or Apple's frameworks for that matter) allow us to distinguish whether a connection is via USB, Bluetooth, etc? Does Reachability only actually distinguish between cellular vs non-cellular but it calls non-cellular wifi?

    Reviewed by ptrkstr at 2021-03-18 23:22
  • 16. Type Connection

    Tell me, if I connect ethernet cable to appleTv, and I need to check the connection type, then it cannot recognize it and sets .wifi by default? version 5.1.0, cocoapods.

    Reviewed by MaxAndreevich at 2021-03-11 18:13
We need to observe the REAL reachability of network. That's what RealReachability do.

RealReachability We need to observe the REAL reachability of network for iOS. That's what RealReachability do. Why RealReachability? As we know, we al

Jun 12, 2022
Swift Express is a simple, yet unopinionated web application server written in Swift
Swift Express is a simple, yet unopinionated web application server written in Swift

Documentation <h5 align="right"><a href="">Live ?? server running Demo <img src="

May 23, 2022
Easy to use OAuth 2 library for iOS, written in Swift.
Easy to use OAuth 2 library for iOS, written in Swift.

Heimdallr Heimdallr is an OAuth 2.0 client specifically designed for easy usage. It currently supports the resource owner password credentials grant f

May 30, 2022
Network abstraction layer written in Swift.
Network abstraction layer written in Swift.

Moya 14.0.0 A Chinese version of this document can be found here. You're a smart developer. You probably use Alamofire to abstract away access to URLS

Jun 23, 2022
OAuth2 framework for macOS and iOS, written in Swift.
OAuth2 framework for macOS and iOS, written in Swift.

OAuth2 OAuth2 frameworks for macOS, iOS and tvOS written in Swift 5.0. ⤵️ Installation ?? Usage ?? Sample macOS app (with data loader examples) ?? Tec

Jun 21, 2022
A generic network layer written in swift

SwiftyNet 1.0.0 A generic network layer written in swift. you can use it as an abstraction layer above Alamofire with generic returned types. Installa

Oct 11, 2021
Tiny http server engine written in Swift programming language.

What is Swifter? Tiny http server engine written in Swift programming language. Branches * stable - lands on CocoaPods and others. Supports the latest

Jun 26, 2022
MQTT for iOS and macOS written with Swift

CocoaMQTT MQTT v3.1.1 client library for iOS/macOS/tvOS written with Swift 5 Build Build with Xcode 11.1 / Swift 5.1 Installation CocoaPods Install us

Jun 15, 2022
Http Request wrapper written in Swift

Net Net is a HttpRequest wrapper written in Swift Features GET, POST, PUT, DELETE method Powerful request params: nested params, number, string, dic,

Apr 14, 2022
A simple GCD based HTTP client and server, written in 'pure' Swift
A simple GCD based HTTP client and server, written in 'pure' Swift

SwiftyHTTP Note: I'm probably not going to update this any further - If you need a Swift networking toolset for the server side, consider: Macro.swift

Jun 9, 2022
DispatchSource based socket framework written in pure Swift

SwiftDSSocket Overview SwiftDSSocket is a purely swift based asynchronous socket framework built atop DispatchSource. Function signatures are pretty m

Apr 24, 2022
A simple HTTP server written in Swift

http4swift http4swift is a tiny HTTP server library for Nest-compatible applications. This project is unstable, and the API might be changed at anytim

Jul 20, 2018
WebSocket(RFC-6455) library written using Swift

DNWebSocket Object-Oriented, Swift-style WebSocket Library (RFC 6455) for Swift-compatible Platforms. Tests Installation Requirements Usage Tests Conf

Jan 29, 2022
RSNetworking is a networking library written entirly for the Swift programming language.

RSNetworking is a networking library written entirly for the Swift programming language.

Feb 25, 2018
iOS Network monitor/interceptor framework written in Swift
iOS Network monitor/interceptor framework written in Swift

NetShears NetShears is a Network interceptor framework written in Swift. NetShears adds a Request interceptor mechanisms to be able to modify the HTTP

Jun 10, 2022
📱  A strongly-typed, caching GraphQL client for iOS, written in Swift.
📱  A strongly-typed, caching GraphQL client for iOS, written in Swift.

Apollo iOS is a strongly-typed, caching GraphQL client, written in Swift. It allows you to execute queries and mutations against a GraphQL server, and

Jun 18, 2022
Lightweight, flexible HTTP server framework written in Swift

Hummingbird Lightweight, flexible server framework written in Swift. Hummingbird consists of three main components, the core HTTP server, a minimal we

Jun 19, 2022
ServiceData is an HTTP networking library written in Swift which can download different types of data.

ServiceData Package Description : ServiceData is an HTTP networking library written in Swift which can download different types of data. Features List

Nov 11, 2021
AsyncHTTP - Generic networking library written using Swift async/await

Generic networking library written using Swift async/await

May 6, 2022