Question

i have two database one database in webserver and other database in local
here i have to cheek in device if online connection is on then data should come from webserver database if online is off then data is come from sqlite local database and diplay data on iphone please help me in this problem

Answer 1

Add reachabilty.m and reachabilty.h to your project. In your controller which is active throughout the life of the program add the following lines and use the below callback.

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(checkNetworkStatus:) name:kReachabilityChangedNotification object:nil];

    internetReachable = [[Reachability reachabilityForInternetConnection] retain];
    [internetReachable startNotifier];

    // check if a pathway to a random host exists
    hostReachable = [[Reachability reachabilityWithHostName: @"www.apple.com"] retain];
    [hostReachable startNotifier];

The callback is as follows:

- (void) checkNetworkStatus:(NSNotification *)notice
{
    // called after network status changes

    NetworkStatus internetStatus = [internetReachable currentReachabilityStatus];
    switch (internetStatus)

    {
        case NotReachable:
        {
            break;

        }
        case ReachableViaWiFi:
        {
            break;

        }
        case ReachableViaWWAN:
        {
            break;

        }
    }

    NetworkStatus hostStatus = [hostReachable currentReachabilityStatus];
    switch (hostStatus)

    {
        case NotReachable:
        {
            break;

        }
        case ReachableViaWiFi:
        {
            break;

        }
        case ReachableViaWWAN:
        {
            break;

        }
    }
}