CODEWITHSUNDEEP
objective-cnstableviewnstabview
whiplash
whiplash

Reputation: 161

NSTableView reload data from different controller

I am having problems updating the content of two tables, which are placed in two different tabs of a NSTabView and each controlled by a different controller (Controller1 and Controller3), from a third controller (Controller2). I tried three different approaches:

Approach #1: I created in Controller1 (the controller of the table invitesTableView) the method refreshTable :

- (void)refreshTable {
  invites = //fill my mutable array
  NSLog(@"%@",invites); 
  [self.invitesTableView reloadData];
  NSLog(@"invite's table view updated");
}

which I later call from Controller2 doing :

Controller1 *controller1 = [[Controller1 alloc] init];
[controller1  refreshTable];

NSLog prints the content of the array invites correctly, but the table is not updated. I should say that, at application launch, I call the very same method in Controller1 and the content of the array invites is correctly loaded in the table.

Approach #2: When in Controller2 I do:

Controller1 *controller1 = [[Controller1 alloc] init];
controller1.invites = //fill my mutable array
NSLog(@"%@",controller1.invites);
[controller1.invitesTableView reloadData];

But again the content of the table is not updated, even if the NSLog shows the correct content.

Approach #3: As Controller1 controls the content of a NSTabViewItem, I integrated in Controller1 the method:

- (void)tabView:(NSTabView *)tabView didSelectTabViewItem:(NSTabViewItem *)inviteTab

and it works just fine, because I call the method refreshTable as soon as open the tab controlled by Controller1. The problem is that I have different tables in different tabs but I can set only one controller as the delegate of the NSTabView, so I can not update the table controlled by Controller3 in a different table. I don't think there is an easy solution to approach #3, apart from merging Controller1 and Controller3, but I think I am just missing something with respect to the first two approaches.

Hope I explained myself clearly. Can anyone help? Thanks in advance!

Upvotes: 1

Views: 788

Answers (1)

Anoop Vaidya
Anoop Vaidya

Reputation: 46543

You can use notifications/observer to reload tableview.

[[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(reloadTable:)
                                             name:@"reloadNotification"
                                           object:nil];

- (void)reloadTable:(NSNotification *)notif {
    [self.tableName reloadData];
}

In your first tab use this:

[[NSNotificationCenter defaultCenter] postNotificationName:@"reloadNotification" 
                                                    object:nil];

Upvotes: 3

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