CODEWITHSUNDEEP
iosiphoneswiftwifi
Bartłomiej Semańczyk
Bartłomiej Semańczyk

Reputation: 61880

How to detect if iPhone JUST connected to internet?

I need to make some things in my app, once device is connected to wifi. It is not about "does it connected to wifi?", instead "tell me when device connected to wifi, while it was offline before?"

In other words I need to response on event when iPhone just connected to internet with any way.

Is it possible with AFNetworking or maybe custom API?

Upvotes: 1

Views: 138

Answers (2)

Bartłomiej Semańczyk
Bartłomiej Semańczyk

Reputation: 61880

Simple usage for AFNetworking:

  1. Add observer:

    NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("networkDidChangeStatus"), name: AFNetworkingReachabilityDidChangeNotification, object: nil)

  2. Implement custom Selector:

    func networkDidChangeStatus() {

    if AFNetworkReachabilityManager.sharedManager().reachable {
        print("connected")
    } else {
        print("disconnected")
    }
}

  3. Start monitoring:

    AFNetworkReachabilityManager.sharedManager().startMonitoring()

Upvotes: 0

Dharmesh Kheni
Dharmesh Kheni

Reputation: 71862

You can use Reachability.

In the sample code you will find:

import UIKit

let useClosures = false

class ViewController: UIViewController {

    @IBOutlet weak var networkStatus: UILabel!

    let reachability = Reachability.reachabilityForInternetConnection()

    override func viewDidLoad() {
        super.viewDidLoad()

        if (useClosures) {
            reachability?.whenReachable = { reachability in
                self.updateLabelColourWhenReachable(reachability)
            }
            reachability?.whenUnreachable = { reachability in
                self.updateLabelColourWhenNotReachable(reachability)
            }
        } else {
            NSNotificationCenter.defaultCenter().addObserver(self, selector: "reachabilityChanged:", name: ReachabilityChangedNotification, object: reachability)
        }

        reachability?.startNotifier()

        // Initial reachability check
        if let reachability = reachability {
            if reachability.isReachable() {
                updateLabelColourWhenReachable(reachability)
            } else {
                updateLabelColourWhenNotReachable(reachability)
            }
        }
    }

    deinit {

        reachability?.stopNotifier()

        if (!useClosures) {
            NSNotificationCenter.defaultCenter().removeObserver(self, name: ReachabilityChangedNotification, object: nil)
        }
    }

    func updateLabelColourWhenReachable(reachability: Reachability) {
        if reachability.isReachableViaWiFi() {
            self.networkStatus.textColor = UIColor.greenColor()
        } else {
            self.networkStatus.textColor = UIColor.blueColor()
        }

        self.networkStatus.text = reachability.currentReachabilityString
    }

    func updateLabelColourWhenNotReachable(reachability: Reachability) {
        self.networkStatus.textColor = UIColor.redColor()

        self.networkStatus.text = reachability.currentReachabilityString
    }


    func reachabilityChanged(note: NSNotification) {
        let reachability = note.object as! Reachability

        if reachability.isReachable() {
            updateLabelColourWhenReachable(reachability)
        } else {
            updateLabelColourWhenNotReachable(reachability)
        }
    }
}

Upvotes: 1

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