Checking the Internet Connection iOS App

Question

In my splash screen I subscribe to the UIApplicationDidBecomeActiveNotification.

 - (void)viewDidLoad
{
    [super viewDidLoad];


    // register notifications

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkInternetConnection:) name:UIApplicationDidBecomeActiveNotification object:nil];

}

-(void) checkInternetConnection:(NSNotification *) notification
{
    internetStatus = [[Reachability reachabilityForInternetConnection] currentReachabilityStatus];

    if(internetStatus == NotReachable)
    {
        [AppHelper showAlert:@"ERROR" message:@"Error downloading data. Please check your network connection and try again." cancelButtonTitle:nil otherButtonTitles:@[@"OK"]];
        return;
    }

    [self viewDidAppear:YES];
}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    if(!(internetStatus == NotReachable))
    {
        AppDelegate *applicationDelegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
        [applicationDelegate performSelector:@selector(showMainMenu) withObject:[NSNumber numberWithBool:YES] afterDelay:3.0];
    }
}

The problem is that the internet connection will only be checked on the splash screen so if I am in the middle of some other screen and I loose internet connectivity then there is no way to tell that the connection has been gone. How can I make a good logic to check for the client's internet connection.

Hope this below link is helpful for use.. [http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk][1] [1]: http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk — Bharathi D, May 14 '13 at 16:50

score 1 · Answer 1 · answered May 14 '13 at 15:47

You want to use a reachability library which allows you to get callbacks about changes (like this one).

Then, in each controller that requires it, create a reachability instance and set the reachableBlock and unreachableBlock to perform your required actions.

score 0 · Answer 2 · answered May 14 '13 at 16:28

0

I would recommend creating a class that all internet requests filter though and check for connectivity (using Reachability as suggested) within that class. If you architect it that way it should simplify things a bit.

answered May 14 '13 at 16:28

savner

830
6
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Checking the Internet Connection iOS App

2 Answers2