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POButton added to custom section header view disappears when row is deleted
 

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    <p>Just came across some very strange behavior in my app. I've recreated the problem in a simplest-case scenario:</p> <pre><code>NSMutableArray *data; - (void)viewDidLoad { [super viewDidLoad]; data = [[NSMutableArray arrayWithObjects:@"1", @"2", @"3", nil] retain]; } - (UIView *)tableView:(UITableView *)aTableView viewForHeaderInSection:(NSInteger)section { UIView *header = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, self.view.frame.size.width, 32.0)]; header.backgroundColor = [UIColor lightGrayColor]; [header addSubview:self.button]; return header; } - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { [data removeObjectAtIndex:indexPath.row]; [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationTop]; } } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ return data.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell *cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil] autorelease]; cell.textLabel.text = [data objectAtIndex:indexPath.row]; return cell; } - (void)dealloc { [super dealloc]; } </code></pre> <p>Every time I delete a row; the button in my header disappears! This happens no matter what type of rowAnimation I use. If I scroll the table up so that the header scrolls off; the button returns when the header returns. The button is created in the xib file.</p> <p>I can work around it in one of 2 ways:</p> <ul> <li>Reloading the tableView data after the delete; with a delay so that the deletion animation completes first.</li> <li><p>Creating the button in viewForHeaderInSection instead of in the interfaceBuilder. </p> <p>I'd really like to understand what's going on here. Where is the button going? I've confirmed that viewForHeaderInSection is called when I delete a row.</p></li> </ul> <p><em>Edit</em> I tried changing it so that the button is created in viewForHeader, instead of in the xib, but it's causing other strange issues... when I create or delete the button, I am setting certain properties such as the title and enabled depending on how many items there are in the table. When I delete the last row in the table, I don't see the update in text and enabled status until I scroll the button off the screen and back on again.</p>
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    1. USGendoIkari
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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