StackOverflow2013

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copied!<p>I did something similar, but not with images but buttons. If a cell wasn't selected yet and gets tabbed, the size is changed and a certain and individual number of buttons is added. If another cell was selected, this one gets closed.</p> <p><strong>Code from form the UITableViewController</strong></p> <p>interface:</p> <pre><code>int openedCellIndex;//<-what cell is selected int buttonCounter; </code></pre> <p>implementation: </p> <pre><code>- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { if ( indexPath.row != openedCellIndex ) { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[TRTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; //cell.frame = CGRectMake (0,0, 320, 100); } id <P_E_P1Article> article = [self.fetchedResultsController objectAtIndexPath:indexPath]; cell.textLabel.text = article.name; if ( self.cellBackgroundColor ) cell.backgroundColor = self.cellBackgroundColor; return cell; } else { //get article id <P_E_P1Article> article = [self.fetchedResultsController objectAtIndexPath:indexPath]; //number of buttons int buttons = [article.specification count]; int height = 50 * ceil(buttons / 2) + 50; //construct special cell UITableViewCell *cell = [[[TRTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"CellBig"] autorelease]; cell.frame = CGRectMake (0,0, 320, 150); cell.textLabel.text = @""; //add label UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 10, 280, 30)]; label.font = [UIFont boldSystemFontOfSize:17]; label.text = article.name; label.backgroundColor = [UIColor clearColor]; [cell addSubview:label]; [label release]; if ( buttonMapper == nil ) self.buttonMapper = [NSMutableDictionary dictionaryWithCapacity:10]; //NSLog (@" bla: %@", article.isFreePrice); //see if we have a free prized article //create the buttons NSEnumerator *enumerator = [article.specification objectEnumerator]; id <P_E_P1ArticleSpecification> spec; int count = 0; NSArray *specs = [self sortedArticleSpecifications:article]; for ( spec in specs ) { //see which row and col the button is in int row = floor ( count / 2 ); int col = count % 2; //define button position int left = 20 + col * 145; int top = 45 + row * 50; //create button UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; button.frame = CGRectMake(left, top, 135, 40); [cell addSubview:button]; [button setTitleColor:[UIColor blackColor] forState:0]; [button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside]; //remember which article the button is attached to buttonCounter++; button.tag = buttonCounter; [buttonMapper setValue:spec forKey:[NSString stringWithFormat:@"bla%d",buttonCounter]]; count++; } if ( self.cellBackgroundColor ) cell.backgroundColor = self.cellBackgroundColor; return cell; } } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { if ( openedCellIndex == indexPath.row ) { id <P_E_P1Article> article = [self.fetchedResultsController objectAtIndexPath:indexPath]; int count = [article.specification count]; int height = 50 * ceil(count / 2.) + 50; return height; } return 50; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [tableView deselectRowAtIndexPath:indexPath animated:YES]; [self openRow:indexPath.row]; [self.searchBar resignFirstResponder]; } - (void) openRow:(int) index { if ( index == openedCellIndex ) return; int oldIndex = openedCellIndex; openedCellIndex = index; NSUInteger indexArr[] = {0, oldIndex}; NSIndexPath *oldPath = [NSIndexPath indexPathWithIndexes:indexArr length:2]; NSUInteger indexArr2[] = {0, openedCellIndex}; NSIndexPath *newPath = [NSIndexPath indexPathWithIndexes:indexArr2 length:2]; //update view [(UITableView *)self.view beginUpdates]; if ( oldIndex >= 0 ) [(UITableView *)self.view reloadRowsAtIndexPaths:[NSArray arrayWithObject:oldPath] withRowAnimation:UITableViewRowAnimationFade]; if (openedCellIndex >=0 ) [(UITableView *)self.view reloadRowsAtIndexPaths:[NSArray arrayWithObject:newPath] withRowAnimation:UITableViewRowAnimationFade]; [(UITableView *)self.view endUpdates]; } </code></pre>

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