iOS - NSURLConnection sendAsynchronousRequest method not getting a response in offline mode - ios

Question

Hey I'm new to iPhone and I have been trying to display image icons on table view cell in offline mode.
Using NSUserDefault i am storing array objects locally in Online mode. I am using a method that creates a NSURLRequest, and sends that request with the NSURLConnection method sendAsynchronousRequest:queue:completionHandler:. Sometimes I am not getting any response using this method, so completionHandler is not calling. So i am not getting any image icon on table. Does anyone know how to fix this?
here is my code :
QuickLinksTab *quickLinksmenu = [[QuickLinksTab alloc] init];
quickLinksmenu = [arrayLinks objectAtIndex:indexPath.row];
cell.lblName.text = quickLinksmenu.title;
NSString *strQuickLink = [NSString stringWithFormat:#"http://%#",quickLinksmenu.iconImage];
NSURL* url = [NSURL URLWithString:strQuickLink];
NSURLRequest* request = [NSURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse * response,
NSData * data,
NSError * error) {
if (error)
{
NSLog(#"ERROR CONNECTING DATA FROM SERVER: %#", error.localizedDescription);
}
else{
UIImage* image = [[UIImage alloc] initWithData:data];
// do whatever you want with image
if (image) {
cell.imageIcon.image = image;
}
else{
cell.imageIcon.image = [UIImage imageNamed:#"DefaultPlace.png"];
}
}
}];
QuickLinksTab is my entity class, i am storing quickLinksmenu.title and quickLinksmenu.iconImage locally in my app. I am getting Error message - `
ERROR CONNECTING DATA FROM SERVER:
The Internet connection appears to be offline.
Thanks in Advance.