Updating Data in UITableView from Strings in Another UIViewController

Question

Basically I have two View Controllers: a master and a detail. I'd like for a string inputted in the detail controller to be displayed in a table in the master. In the master controller

I have:

a NSMutableArray property called names
a prepareForSegque method that delegates back
a method to get the string from the 2nd controller:

-(void) detailViewControllerAdd:(DetailViewController *)detailViewController{
```
    [self.names addObject:detailViewController.name];
    [self dismissViewControllerAnimated:YES completion:nil];    }
```

and a UITableView:

-(UITableViewCell *) tableView: (UITableView *) tableView cellForRowAtIndexPath:(NSIndexPath *) indexPath{

      UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
      cell.textLabel.text = self.names[indexPath.row];
      return cell;
}

-(NSInteger) tableView: (UITableView *) tableView numberOfRowsInSection: (NSInteger) section
{
      return self.names.count;
}

In my second ViewController (detail) I have a textfield and an "add" button. I'd like for the textfield text to be added into the table rows of the master view controller.

-(IBAction)addButton: (id)sender
{
     self.name = self.nameTextField.text;
     [self.delegate detailViewControllerAdd:self];
}

Sorry if that's confusing, I'm trying to keep it as simple as possible. I know the names are being added fine because I can see them in NSLog. I've also tried looking up people's suggestions but [tableView reloadData] doesn't work at all, and [self.tableView] doesn't even exist.

Any help or advice is greatly appreciated. Also, the segue action is 'modal' if that helps.

The problem is the way you load the table. Try to search how to display an UITableView or you can see the link: http://www.codigator.com/tutorials/ios-uitableview-tutorial-for-beginners-part-1/ — sahara108, Mar 27 '14 at 04:50
Thank you sahara108, that link really helped and it's all good now :) — Julia, Mar 27 '14 at 08:19

score 0 · Accepted Answer · edited May 23 '17 at 12:05

0

Please see this very popular question. showing passing data between view controllers.Surely it will help.

edited May 23 '17 at 12:05

Community

1
1

answered Mar 27 '14 at 04:59

jnix

480
3
10

score 0 · Answer 2 · answered Mar 27 '14 at 06:28

In cellForRow, you should create cell if don't have a reusable cell.

-(UITableViewCell *) tableView: (UITableView *) tableView cellForRowAtIndexPath:(NSIndexPath *) indexPath{

      UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
      if (cell == nil) {
          cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:@"Cell"];
      }

      cell.textLabel.text = self.names[indexPath.row];
      return cell;
}

if you don't want to check cell == nil, you should use - (id)dequeueReusableCellWithIdentifier:(NSString *)identifier forIndexPath:(NSIndexPath *)indexPath which is available above iOS6.

Updating Data in UITableView from Strings in Another UIViewController

2 Answers2