Question

I use a plist containing of an array of dictionaries to fill a MainTableViewController through a MutableArray. When a cell is chosen, the reprecented dictionary are passed to the DetailViewController, where the values from the strings in the reprecented dictionary are displayed. I’ve added a button to the DetailView in the storyboard, and I want this button to send the reprecented dictionary to the Favorites tab, which is called FavoritesTableViewController. I’m thinking of ways to do it but I’m new to programming so I have to ask for advice.

I’ve come up with two possible ways of doing it. I may be far away from the right answer, but at least I’m trying to think.

1: The button changes a boolean to yes in the reprecented dictionary, and the prototype cell in the FavoritesViewController are told to display the dictionaries with boolean=yes.

2: The button copies the dictionary to a new plist with favourites, displayed in the favourites tableview.

But I really have no idea..

EDIT:

Code so far in the DetailViewController:

-(IBAction)FavoriteButton:(id)sender
{
    [[NSNotificationCenter defaultCenter] postNotificationName:@"ItemSelected"
                                                    object:selectedObject];


}

Code so far to display the wines in the FavoritesViewController:

[[NSNotificationCenter defaultCenter] addObserverForName:@"ItemSelected"
                                                  object:nil
                                                   queue:[NSOperationQueue mainQueue]
                                              usingBlock:^(NSNotification* notif) {
                                                  [favoritedObjects release];
                                                  favoritedObjects = [[notif object] retain];
                                                  [self.tableView reloadData];
                                              }];

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [favoritedObjects count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Favcell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

// Configure the cell...

    NSString *cellValue = [favoritedObjects valueForKey:@"Name"];
    cell.textlabel.text = cellValue;

    return cell;
}

This shows 20 cells with the value from the Key: “Name” from the last Object in the DetailViewController I pressed “Add to Favorites” button for. For example if I add “Gato Negro” to favorites, it displays “Gato Negro” in 20 cells. if I then add “Luna” to fav, it displays “Luna” in the 20 cells in FavoritesViewController.

Answer 1

How about posting a notification and passing the selected dictionary as the object or userInfo?

[[NSNotificationCenter defaultCenter] postNotificationName:@"ItemSelected"
                                                    object:mySelectedDictionary];

In the FavoritesViewController you just subscribe to this notification (e.g. in the init method) like this:

[[NSNotificationCenter defaultCenter] addObserverForName:@"ItemSelected"
                                                  object:nil
                                                   queue:[NSOperationQueue mainQueue]
                                              usingBlock:^(NSNotification* notif) {
                                                  [dictionaryToShow release];
                                                  dictionaryToShow = [[notif object] retain];
                                                  [self.tableView reloadData];
                                              }];