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Matthew Chess
Matthew Chess
13,860 Points

UiTabBar Swipe to Delete a row

I wanted to add a feature to the Ribbit app that a user could swipe a row to delete a contact. Could someone guide me what to look for in the documentation?

2 Answers

This is a great idea for a feature to add!

After a little work messing around, and adding some cheeky animations I came up with the following:

#pragma mark - Swipe to delete

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;

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

        PFUser *userToDelete = [self.friends objectAtIndex:indexPath.row];
        NSLog(@"Deleting User: %@", userToDelete.username);
        [self.friendsRelation removeObject:userToDelete];
        [[PFUser currentUser] saveInBackground];

        [self.friends removeObjectAtIndex:indexPath.row];
        NSRange range = NSMakeRange(0, 1);
        NSIndexSet *sectionToReload = [NSIndexSet indexSetWithIndexesInRange:range];
        [tableView reloadSections:sectionToReload withRowAnimation:UITableViewRowAnimationFade];

In order to make this all work you need to change the friends property from an NSArray to an NSMutableArray to efficiently remove and reload the tableview.

Link to the Apple Doc for UITableViewDataSource

Hope this helps dude! :)

Imran Mouna
Imran Mouna
2,504 Points

Awesome thank you! If it help anyone else when I switched the friends NSArray to an NSMutable Array I had change the following in viewWillAppear:

self.friends = objects


self.friends = [objects mutableCopy];

Matthew Chess
Matthew Chess
13,860 Points

. I had thought apple would have a method for this to mimic their other apps but guess not. Thanks man that helps a lot