If there is no internet connection in my iPhone. And i want to fire an event when phone is connected to internet. Is there any method for that?? or should i check for internet connection after every 10 mins or something like that???
You can try below link, this will help you surely
Reachablity checking
Happy coding
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Is there an event or notifier that I can have my app listen for that will tell me when the device I'm running on loses an Internet connection or re-acquires a connection?
What I've found so far are posts that tell me how to retrieve the current status of the connection, to have my app reach out and ask the system whether there is a connection, but I can't find anything about an event from the device's OS that I can just have my app listen for.
You're looking for "Reachability". It sends a notification whenever the status changes. You can either add observers for that notification, or add one to translate the state into your own notifications. See the accepted answer for: iPhone reachability checking
I am making application which uses connection with server through internet.
In my application i want to check if internet is available or not when application starts and during application as well. when there is no internet access then it has to show some alert to tell user.
Thanks for any suggestion in advance.
There is a sample code called Reachability from apple can help you. see the URL below
http://developer.apple.com/library/ios/samplecode/Reachability/Introduction/Intro.html
I am using NSURLConnection to load data from server. So, in my Iphone Application had a button, when click on this button and internet connection is connected, the data will be loaded successfully. But later when I switched off the internet connection on Mac, and then click on that button again, the didFailWithError method does not invoked but other methods such as didReceiveResponse, connectionDidFinishLoading was get called.
Anyone encountered this kind of problem before? Or anyone know the reason of this problem?
Really appreciate for any comments, suggestions and solutions. Thanks.
Before changing any line in your code, try the same test with 4.3 simulator and then 5.0.
I've tried something similar (request to URL and connection is closed with no response), and using 4.3, didFailWithError is called. In 5.0, I get a didReceiveResponse with a status code 200 OK (!) and then connectionDidFinishLoading. Same code, same request, different OS versions...
Strange behavior especially because you turned internet off, but delegate still called for ** connectionDidFinishLoading** how this is possible? Also you wrote what "when click on this button and internet connection is connected" your code still initiated connection without internet?
It's possible, what you configured using of cached data and thats why you got strange behavior like this.
*nix systems by default have timeout for connection on BSD sockets which may don't tell you nothing about what connection is missed. But i think Mac OS/iOS configured for this kind of case.
I need to download some images from the Internet and right now I'm using NSOperationQueue.
I want to know if it is possible to receive an Internet connection notification to be able to pause/resume the download.
I don't need to freeze the download, but just being able to put it (the NSOperation) back on the queue and wait for connection to start it again would be awesome.
Any ideas?
:)
After checking for reachability, you can set the NSOperationQueue length to 0 if it's not reachable. That way you can effectively pause it.
See this link for further help. You could use the code with apple documentation listed.
WAN detection and airport detection is shown in the code.
http://developer.apple.com/library/ios/#samplecode/Reachability/Introduction/Intro.html
I have implemented connectionDidFailWithError to alert the user of any errors that happen in the network connections like time out, no internet connection etc.
It gives me correct notification when no internet connection is available.
So do I still need to implement Apple's reachability code?
as long as you handle every possible scenario of no connectivity on all your connection attempts and report to the user that you cannot connect, you should be ok.
it is easier to just have a main connectivity checking mechanism and test connectivity prior to making your request.
for instance, i had a mapview that i checked my connection to my service but not the internet for the mapview to grab tile images and it got rejected because if the mapview didnt have a connection, nothing would show up in the map and it didnt tell the user...