在表格视图中访问我的自定义单元格

Question

Right now I have a tableview that is built like this:

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

    // Configure the cell...

    NSString *photoCaption = [[[self.form valueForKey:@"photos"] objectAtIndex:indexPath.row] objectForKey:@"caption" ];

    cell.textfieldCaption.text = photoCaption;
    cell.textfieldCaption.tag=indexPath.row;

    return cell;
}

What I want to do is get the index of the textfield that was edited? I wired up the textfield in the custom cell and made an action that executes on ending an edit:

- (IBAction)getIndexForCaption:(id)sender {

[[[self.form valueForKey:@"photos"] objectAtIndex:cell.textfieldCaption.tag] setObject:cell.textfieldCaption.text forKey:@"caption"];

}

But how this is now, I dont have the "cell" so I get undeclared identifier "cell" error. How can I get the custom cell in this case?

Answer 1

There are several options available to do this. Personally, I would prefer make a subclass of UITextField with an extra property for the PhotoSummaryCell . You could set this property when the cell gets recycled, and this would make getting the index of the text field as easy as:

NSIndexPath *indexOfTextField = [self.tableView indexPathForCell:textField.cell];

Then of course, you could step through the text fields view hierarchy until you find a cell, or save the index path's row into the textfields tag property as @rmaddy and @Martin R pointed out.

Make sure that you declare your cell property as weak to avoid retain cycle.