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7.4K Stars 849 Forks MIT License 337 Commits 77 Opened issues


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

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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


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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
  4. 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
  2. Add

    github "ashleymills/Reachability.swift"
    to your Cartfile.
  3. Run

    carthage update
  4. Drag

    from the
    directory to the
    Linked Frameworks and Libraries
    section of your Xcode project’s
  5. Add

    Input Files
    of Run Script Phase for Carthage.
  6. 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

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