CODEWITHSUNDEEP
iphoneiosuitableview
aryaxt
aryaxt

Reputation: 77596

iOS - UITableView refresh table properly?

I have lots of data and lots of rows in my tableView. when data changes I want to update my visible cells on the screen, I really don't want to use reloadData because it's an expensive call.

Is it possible to somehow update the visible cells only? I tried calling : beginUpdate & endUpdate on the table, but that doesn't work all the time?

Any suggestions?

Upvotes: 36

Views: 25097

Answers (3)

pableiros
pableiros

Reputation: 16022

For Swift 3:

tableView.reloadRows(at: tableView.indexPathsForVisibleRows!, with: .none)

Upvotes: 0

Free Mason
Free Mason

Reputation: 107

Try calling 'deleteRowsAtIndexPaths', a method of UITableView, right after you delete the model from your data source. For example, if you are deleting a row in editing mode, you could write something like the code below. Note that the first line in the 'if' statement removes the object from the data source, and the second line cleans up the table: 

-(void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{

    if ( editingStyle == UITableViewCellEditingStyleDelete ) {

         [[[[[ItemsStore sharedStore] parameterArray] objectAtIndex:indexPath.section]  objectForKey:@"data"] removeObjectAtIndex:indexPath.row];

        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];

    }
}

Upvotes: -1

Seamus Campbell
Seamus Campbell

Reputation: 17906

You can:

[tableView reloadRowsAtIndexPaths:[tableView indexPathsForVisibleRows] 
                 withRowAnimation:UITableViewRowAnimationNone];

Upvotes: 87

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