How to check if there is internet connection on iPhone OS devices

[Fahad]

Hey guys,

Here I'll show you how to detect if there is no internet connection on iPhone device which is using the device and give an error message if it's not there.

First you need to download the Reachability from apple's site.

1) Import Reachability.h, Reachability.m and CFNetwork, SystemConfiguration Frameworks to your project.

2) Import Reachability.h in your .m file by putting this code at start of your file:

 #import "Reachability.h"

3) now inside your viewDidLoad insert this code:

 Reachability *r = [Reachability reachabilityWithHostName:@"www.google.com"];
	
	NetworkStatus internetStatus = [r currentReachabilityStatus];
	
	if ((internetStatus != ReachableViaWiFi) && (internetStatus != ReachableViaWWAN))
	{
		UIAlertView *myAlert = [[[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"This app require an internet connection via WiFi or cellular network to work." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil] autorelease];
		[myAlert show];
		
			}

This code will check if it can connect to google.com and if now will make a UIAlertView with title "No Internet Connection" and message "This app require an internet connection via WiFi or cellular network to work."


That's it if you need any help implementing it, leave a replay.

[Creegan]

Hey guys,

Here I'll show you how to detect if there is no internet connection on iPhone device which is using the device and give an error message if it's not there.

First you need to download the Reachability from apple's site.

1) Import Reachability.h, Reachability.m and CFNetwork, SystemConfiguration Frameworks to your project.

2) Import Reachability.h in your .m file by putting this code at start of your file:

 #import "Reachability.h"

3) now inside your viewDidLoad insert this code:

 Reachability *r = [Reachability reachabilityWithHostName:@"www.google.com"];
	
	NetworkStatus internetStatus = [r currentReachabilityStatus];
	
	if ((internetStatus != ReachableViaWiFi) && (internetStatus != ReachableViaWWAN))
	{
		UIAlertView *myAlert = [[[UIAlertView alloc] initWithTitle:@"No Internet Connection" message:@"This app require an internet connection via WiFi or cellular network to work." delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil] autorelease];
		[myAlert show];
		[myAlert release];
		
			}

This code will check if it can connect to google.com and if now will make a UIAlertView with title "No Internet Connection" and message "This app require an internet connection via WiFi or cellular network to work."


That's it if you need any help implementing it, leave a replay.

Just a quick note, this might crash if this is implemented in a controller other than the AppDelegate Controller, this because you are marking the alert window for "autorelease" and the you are calling the "release" method; thus; taking the "retainCount" below 0 since it was never retained.

You should either NOT mark it for "autorelease" or remove the "release" message.

Thanks for the share on this subject
Highly appreciated.

[Fahad]

Just a quick note, this might crash if this is implemented in a controller other than the AppDelegate Controller, this because you are marking the alert window for "autorelease" and the you are calling the "release" method; thus; taking the "retainCount" below 0 since it was never retained.

You should either NOT mark it for "autorelease" or remove the "release" message.

Thanks for the share on this subject
Highly appreciated.

Thanks for the info, actually i was wondering what was the reason of the crash if there isn't any internet connection.

[sunglassdesign]

Thank You its a Really Nice Service,I am not Aware with this Details.