DemonstratesUITableViewRowActionUITableViewController.m

- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewRowAction *moreAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"More" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
        // maybe show an action sheet with more options
        [self.tableView setEditing:NO];
    }];
    moreAction.backgroundColor = [UIColor lightGrayColor];
    
    UITableViewRowAction *blurAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Blur" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
        [self.tableView setEditing:NO];
    }];
    blurAction.backgroundEffect = [UIVibrancyEffect effectForBlurEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleExtraLight]];
    
    UITableViewRowAction *deleteAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:@"Delete"  handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
        [self.objects removeObjectAtIndex:indexPath.row];
        [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    }];
    
    return @[deleteAction, moreAction, blurAction];
}

// From Master/Detail Xcode template
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [self.objects removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view.
    }
}

Thanks for the snippet...
May be worth noting that the order in which you return the actions determines their position. The first action returned is the right-most action button.
So that its more iOS-like with the delete button at the far right, change the order they are returned as below:
return @[deleteAction, moreAction];

Another point for those that are interested:
UITableViewRowActionStyleDefault => Red(?) button
UITableViewRowActionStyleNormal => Grey Button
UITableViewRowActionStyleDestructive => Red Button

To change the color:
[moreAction setBackgroundColor:[UIColor orangeColor]];

Add blur and vibrancy effects (not sure what's going on here... these seem more targeted to imageViews)

Create a blur effect:
UIBlurEffect *myBlur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];

Add a vibrancy effect to the blur effect if you want:
[moreAction setBackgroundEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleExtraLight]];

Apply to the action:
[moreAction setBackgroundEffect:[UIVibrancyEffect effectForBlurEffect:myBlur]];
[moreAction setBackgroundEffect:myBlur];

How can I return the row to its initial position after its action has been triggered?

EDIT: Solved by adding [self.tableView setEditing:NO] to the action handler per suggestion by @marksands

Updated gist with @maddoggy1979's tips.

Have you successfully placed an image in each action button instead of text?

Did you see a way to add these buttons when swiping from left to right? like in the mail app "mark as read"?

@marksands How to set equal width for UITableViewRowAction?(Delete,More,etc)

how do you swap the title text for an image/icon?

this looks like a work around but not ideal (swift):
deleteAction.backgroundColor = UIColor(patternImage: UIImage(named:"sample")!)

You can have your delete action call the delegate method to simplify things:

let deleteAction = UITableViewRowAction(style: .Default, title: "Delete") { (rowAction, indexPath) -> Void in
    self.tableView(tableView, commitEditingStyle: .Delete, forRowAtIndexPath: indexPath)
}

What about buttons that show when the user swipes from left to right direction?

this was super useful! thanks :)

thanks !