Checking Internet Connection in iOS Apps

In this section, i will be describing about how we can check internet connectivity in iOS apps. For this kind of task, Apple has provided a very helpful sample reachability class . So, we will be using that class to make it working on our apps. First , grab the reachability sample code from: http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html

Now, you don't have to ho through all the codes in sample app, just follow these few steps to check internet connection in our app :

1. Add the SystemConfiguration.framework to your project.
2. Add the files Reachability.h and Reachability.m only from the Reachability sample code you just downloaded to your project.
3. Add the following code in the implementation file where you need to test the Internet connection.    

#import "Reachability.h"

        //// Just use it ,Where you need it  (checking internet connection)

        Reachability *reachTest = [Reachability reachabilityWithHostName:@"www.apple.com"];     

        NetworkStatus internetStatus = [reachTest  currentReachabilityStatus];    

        

         if ((internetStatus != ReachableViaWiFi) && (internetStatus != ReachableViaWWAN)){   

                  /// Create an alert if connection doesn't work,no internet connection   

               UIAlertView *myAlert = [[UIAlertView alloc] initWithTitle:@"No Internet Connection" 

                                                         message:@"You require an internet connection via WiFi or cellular   

                                                         network for location finding to work."  delegate:self  

                                                         cancelButtonTitle:@"Ok"  otherButtonTitles:nil];  

                 [myAlert show];  

                  [myAlert release];  

               } 

      else{  

               // There is a internet connection

              /// Do,Whatever you want  

        }