wait while webservice executes

[jbourne08]

Hi,
I have a webservice which returns a value. Depending on the value i want to create a new tableview with that many rows.
For example if the webservice returns a value 5. In that case i want to display a new tableview with 5 rows.

My problem is, how do i wait till the webservice executes and return a value.
Since the code does not wait the rowcount value is 0.

Any suggestions on what i should do??
thanks

 (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

	NSString *selectedVertical =[listOfItems objectAtIndex:indexPath.row];
	[self connectToWebservice: selectedVertical];
	
	if (RowCount > 0)
	{
		//Get the dictionary of the selected data source.
		NSDictionary *dictionary = [self.tableDataSource objectAtIndex:indexPath.row];
	
	
		//Get the children of the present item.
		NSArray *Children = [dictionary objectForKey:@"Children"];
	
		//if([Children count] == 0) {
		
		DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:[NSBundle mainBundle]];
		[self.navigationController pushViewController:dvController animated:YES];
		[dvController release];
		RowCount=-1;
	}
}