Update UITableViewCell from another View

Question

I have a tableview filled with custom cells. In every cell there are two buttons and if I press the first one I navigate to another view, lets call it secondview.

On my secondview there is one button which has the same functionality as the second button on my cell from the previous tableview. When I press the button on my secondview I hide it, but I also want to hide the second button on my cell.

But attention! I only want to hide the second button on this particular cell where I pressed the first button, not all of them!

How can I do that? Thanks in advance!

score 2 · Accepted Answer · answered Jul 20 '12 at 07:44

2

You should pass the first view as a delegate to the second view and when the change is made in the second you will call the first view's hideSecondButton or whatever mwthod you make. Anyway, your problem's keyword is delegate.

answered Jul 20 '12 at 07:44

Templar

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Thanks, can you provide at least a pseudo example? – oybcs Jul 20 '12 at 07:49
Some good examples are [here](http://timneill.net/2010/11/modal-view-controller-example-part-2/) and [here](http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c) – Templar Jul 20 '12 at 08:27

score 1 · Answer 2 · answered Jul 20 '12 at 07:59

Easiest way to implement this is using notifications. On your data model when model changed publish a notification.

[[NSNotificationCenter defaultCenter] postNotificationName:@"fooModelChanged" object:self];

On views and view controllers where you want to listen a model's fooModelChanged notification add this and implement a listener method.

- (void)viewDidLoad {
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(fooModelHasChanged:) name:@"fooModelChanged" object:fooModel];
}

- (void)fooModelHasChanged:(NSNotification*)notification {
   // Add buttons, remove buttons or simply...
   [self.tableView reloadData];
}

The problem could be solved with a better approach by using delegates. But it would take longer to explain and implement. I suggest you read more objective-c codes to understand listener implementations.

score 0 · Answer 3 · answered Sep 11 '12 at 18:31

0

@Cernal, is 'object:fooModel' refering to 'fooModel.xcdatamodeld' or have I missed something?

answered Sep 11 '12 at 18:31

Mac

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Update UITableViewCell from another View

3 Answers3