Internet reachability on iOS

 public class CheckInternet : MonoBehaviour {

     public static CheckInternet instance;
     const float CheckTimer = 5f;
 
     public bool isconnectedToInternet = false;

     void Awake()
     {
        
           instance = this;
     }

     void Start () {

         InvokeRepeating("PingService",0,CheckTimer);
     }
 
     void PingService()
     {
         StartCoroutine(PingGOOGLE());
     }
 
     IEnumerator PingGOOGLE()
     {
         WWW www = new WWW("www.google.com");
 
         yield return www;
 
         if(www.error == "" || www.error == null)
         {
             isconnectedToInternet = true;
         }
         else
         {
             isconnectedToInternet = false;
         }
     }
 
 }

this continously pings google every "checkTimer" seconds and isConnectedToInternet gives you the status.

Attach the file to a gameobejct and when you want to check connection, use CheckInternet.instance.isconnectedToInternet == true

alternatively you can use Ping class which is useful for the same purpose especially if u have your own server and check for its rechability

To truly know you're online, you need to implement "captive portal detection", to know if you're e.g. hitting a public WiFi login page. So just checking Application.internetReachability or doing a Ping to some address doesn't guarantee you can successfully make connections or make WWW requests.

I have made an easy asset which keeps you up-to-date whether you have verified internet access (WWW requests can be done). Works with Desktop, Mobile and Webplayer platforms (need to self-host a file in originating server for Webplayer). More info here: http://j.mp/IRVUN

Hi,

I have released a event based plugin for ios that lets you do exactly this without having to do it manually. It is very easy to use and works on all ios devices. Android version is on works as well

https://www.assetstore.unity3d.com/en/#!/content/19869