How do I detect change in internet connection on iOS, delegate style?

Question

I need a function to run only when the system detects there is no internet connection, then another function to run when the system detects an internet connection.

I'm thinking of something like this:

func onInternetConnection() {
    //Enable actions
}

func onInternetDisconnection() {
    //Disable actions, alert user
}

I will also need a way to detect when the system is reconnecting, so I can let the user know it's reconnecting, like in Facebook's Messenger.

How can I do this?

I'm using Moya/Alamofire for my network layer.

Alamofire have network reachability included, read about it [here](https://github.com/Alamofire/Alamofire#network-reachability), it use block, kinda better than delegate — Tj3n, May 09 '17 at 09:39
Take a look at the answer [here](http://stackoverflow.com/questions/25398664/check-for-internet-connection-availability-in-swift) — Devika S, May 09 '17 at 09:42
Check [this lib](https://github.com/ashleymills/Reachability.swift#example---closures) too, it can trigger closures when the status of your internet connection changes. — Toldy, May 09 '17 at 09:50

score 4 · Accepted Answer · answered May 09 '17 at 09:59

4

This works in case of Alamofire

import Alamofire

// In your view did load or in app delegate do like this
let reachabilityManager = NetworkReachabilityManager()
reachabilityManager.listener = { status in

  switch status {

  case .notReachable:
    print("The network is not reachable")
    self.onInternetDisconnection()

  case .unknown :
    print("It is unknown whether the network is reachable")
    self.onInternetDisconnection() // not sure what to do for this case

  case .reachable(.ethernetOrWiFi):
    print("The network is reachable over the WiFi connection")
    self.onInternetConnection()

  case .reachable(.wwan):
    print("The network is reachable over the WWAN connection")
    self.onInternetConnection()

  }
}

answered May 09 '17 at 09:59

Inder Kumar Rathore

39,458
17
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Where can I put this so that `reachabilityManager` is retained? – Berry May 09 '17 at 10:14
You can make it instance variable of app delegate or some singleton. – Inder Kumar Rathore May 09 '17 at 10:16
Any way to do this without Alamofire, and natively? – toast Jul 22 '17 at 01:23
1

@toast you can download apples reachabiliy code. Just search apple reachability and you can find their sample on developer site – Inder Kumar Rathore Jul 22 '17 at 12:37

score 0 · Answer 2 · answered May 09 '17 at 12:37

0

Alamofire and Rechability are library and that have some features to check internet connection. You can use one from that.

answered May 09 '17 at 12:37

Rohan Dave

251
1
7

How do I detect change in internet connection on iOS, delegate style?

2 Answers2