单元格显示在节标题的顶部

Question

我有UITableView自定义单元格和自定义标题.当我在编辑时移动一个单元格时,它会弹出标题视图.如何将标题视图保留在所有单元格的顶部？

该应用程序使用故事板,以防有所作为.

这是它的样子吗？https://www.dropbox.com/s/wg8oiar0d9oytux/iOS%20SimulatorScreenSnapz003.mov

这是我的代码:

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

    int handleSection = [self sectionToHandle:indexPath.section];

    switch (handleSection)
    {
        case PrivateLists:
        {
            if (tableView.isEditing && (indexPath.row == self.privateLists.count))
            {
                cell.textField.text = NSLocalizedString(@"Lägg till ny lista", nil);
                cell.textField.enabled = NO;
                cell.textField.userInteractionEnabled = NO;
                cell.accessoryType = UITableViewCellAccessoryNone;
                cell.editingAccessoryView.hidden = YES;
            }
            else
            {
                List *list = [self.privateLists objectAtIndex:indexPath.row];
                cell.textField.text = list.name;
                cell.textField.enabled = YES;
                cell.textField.userInteractionEnabled =YES;
                cell.backgroundColor = [UIColor clearColor];

                cell.onTextEntered = ^(NSString* enteredString){
                    list.name = enteredString;
                    UpdateListService *service = [[UpdateListService alloc]initServiceWithList:list];
                    [service updatelistOnCompletion:
                     ^(BOOL success){
                         DLog(@"Updated list");

                         NSIndexPath *newPath = [NSIndexPath indexPathForRow:0 inSection:indexPath.section];
                         [self.tableView moveRowAtIndexPath:indexPath toIndexPath:newPath];

                         [self moveListToTop:list.ListId newIndexPath:newPath];
                         justMovedWithoutSectionUpdate = YES;
                     }
                                                    onError:
                     ^(NSError *error){
                         [[ActivityIndicator sharedInstance] hide];
                         [[ErrorHandler sharedInstance]handleError:error fromSender:self];
                     }];
                };
            }
        }
            break;
        default:
            return 0;
            break;
    }

    return cell;
}

-(UIView *)tableView:(UITableView *)aTableView viewForHeaderInSection:(NSInteger)section
{
    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 22)];

    UILabel *textLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 300, 21)];
    [textLabel setFont:[[AXThemeManager sharedTheme]headerFontWithSize:15.0]];
    [textLabel setTextColor:[[AXThemeManager sharedTheme]highlightColor]];
    [textLabel setText:@"SECTION TITLE"];
    [textLabel setBackgroundColor:[UIColor clearColor]];

    UIImageView *backgroundView = [[UIImageView alloc]initWithImage:[AXThemeManager sharedTheme].tableviewSectionHeaderBackgroundImage];
    [backgroundView setFrame:view.frame];
    [view addSubview:backgroundView];
    [view sendSubviewToBack:backgroundView];
    [view addSubview:textLabel];

    return view;
}

- (float)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    return 22;
}

- (float)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 44;
}
[...]

Answer 1

好消息!我能够以两种不同的方式解决/解决您的问题(见下文).

我会说这肯定是一个操作系统错误.你正在做什么导致你移动(使用moveRowAtIndexPath:)的单元格被放置在z顺序中的标题单元格的上方(前面).

我能够在OS 5和6中重新编写问题,其中包含已经和没有UITextFields的单元格,并且tableView进入和退出编辑模式(在您的视频中,它处于编辑模式,我注意到).即使您使用标准节标题,也会发生这种情况.

保罗,你在一条评论中说:

我使用加载器解决了这个问题并在预先形成reloadData时"锁定"了表

我不确定你的意思是"使用加载器并锁定表",但我确定调用reloadData后moveRowAtIndexPath:确实解决了问题.这不是你想做的事吗？

[self.tableView moveRowAtIndexPath:indexPath toIndexPath:newPath];
//[self.tableView reloadData];
// per reply by Umka, below, reloadSections works and is lighter than reloadData:
[self reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationNone];

如果你不想这样做,这是另一种对我来说感觉有点hacky的解决方案,但似乎运行良好(iOS 5+):

__weak UITableViewCell* blockCell = cell;  // so we can refer to cell in the block below without a retain loop warning.
...
cell.onTextEntered = ^(NSString* sText)
{
    // move item in my model
    NSIndexPath *newPath = [NSIndexPath indexPathForRow:0 inSection:indexPath.section];
    [self.itemNames removeObjectAtIndex:indexPath.row];
    [self.itemNames insertObject:sText atIndex:0];

    // Then you can move cell to back
    [self.tableView moveRowAtIndexPath:indexPath toIndexPath:newPath];
    [self.tableView sendSubviewToBack:blockCell];  // a little hacky

    // OR per @Lombax, move header to front
    UIView *sectionView = [self.tableView headerViewForSection:indexPath.section];
    [self.tableView bringSubviewToFront:sectionView];

Answer 2

这是一个错误.您可以通过添加行后快速解决它:

[self.tableView moveRowAtIndexPath:indexPath toIndexPath:newPath];

这条线:

UIView *sectionView = [self.tableView headerViewForSection:indexPath.section];
[self.tableView bringSubviewToFront:sectionView];