Display Loading Image on didSelectRowAtIndexPath - iphone

Question

I am trying to have my activity indicator start animating as soon as the user clicks on a row in my tableview. My problem is that the activity indicator doesn't start animating right away. My understanding is that the UI is not updated and the activity indicator does not start animating until all of the operations in the didSelectRowAtIndexPath are completed.
How can I edit this block of code to animate the activity indicator right when the user clicks a row?
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
*)indexPath
{
// Activity Indicator
[activityIndicator startAnimating];
NSDictionary *item;
if (tableView == self.searchDisplayController.searchResultsTableView) {
item = [[NSDictionary alloc] initWithDictionary:[filteredListItems
objectAtIndex:indexPath.row]];
} else {
item = [[NSDictionary alloc] initWithDictionary:[listItems
objectAtIndex:indexPath.row]];
}
//Push to New View Controller
DetailViewController *detailViewController = [[DetailViewController alloc]
initWithNibName:#"DetailViewController" bundle:nil];
profileViewController.newsArticle = item;
[self.navigationController pushViewController:detailViewController animated:YES];
}
I have been fiddling with these bits of code, but don't know how to tie it all together. Any help would be great! Thank you!
[self performSelector:#selector(pushDetailView:) withObject:tableView afterDelay:0.1];
- (void)pushDetailView:(UITableView *)tableView {
// Push the detail view here
}

Answer 1

Might not be a solution, but a possible workaround.
Move your "rest of the code here" to a separate method and call it with a delay using
self performSelector: withObject: afterDelay:
I hope this will let your loading image view to appear before performing the selector.
update:
I would suggest you to something like below, after determining item pass it to the delayed method and leave the rest to it.
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
*)indexPath
{
// Activity Indicator
[activityIndicator startAnimating];
NSDictionary *item;
if (tableView == self.searchDisplayController.searchResultsTableView) {
item = [[NSDictionary alloc] initWithDictionary:[filteredListItems
objectAtIndex:indexPath.row]];
} else {
item = [[NSDictionary alloc] initWithDictionary:[listItems
objectAtIndex:indexPath.row]];
}
[self performSelector:#selector(pushDetailView:) withObject:item afterDelay:0.1];
}
- (void)pushDetailView:(id)item {
// Push the detail view here
//Push to New View Controller
DetailViewController *detailViewController = [[DetailViewController alloc]
initWithNibName:#"DetailViewController" bundle:nil];
profileViewController.newsArticle = item;
[self.navigationController pushViewController:detailViewController animated:YES];
}