单元格显示在节标题的顶部 [英] Cell shows on top of section header
问题描述
我有一个带有自定义单元格和自定义标题的 UITableView 。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？
I have an UITableView with custom cells and custom headers. When I move one cell upon editing, it pops up on to of the header view.
How can I keep the header view on top of all the cells?
该应用程序使用故事板，以防万一。
The app uses storyboard, in case that makes a difference.
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;
}
[...]
推荐答案
好消息！我能够以两种不同的方式修复/解决您的问题（见下文）。
Good news! I was able to fix/workaround your problem in two different ways (see below).
我想说这肯定是一个操作系统错误。你正在做什么导致你移动的单元格（使用 moveRowAtIndexPath：）放在z顺序中的标题单元格的上方（前面）。
I would say this is certainly an OS bug. What you are doing causes the cell you have moved (using moveRowAtIndexPath:) to be placed above (in front of) the header cell in the z-order.
我能够在操作系统5和6中重现问题，其中包含已经和没有UITextFields的单元格，以及tableView进出编辑模式（在你的视频中）处于编辑模式，我注意到了）。即使您使用的是标准版块标题，也会发生这种情况。
I was able to repro the problem in OS 5 and 6, with cells that did and didn't have UITextFields, and with the tableView in and out of edit mode (in your video it is in edit mode, I noticed). It also happens even if you are using standard section headers.
保罗，您在其中一条评论中说道：
Paul, you say in one of your comments:
我使用加载器严重解决了这个问题并锁定了表格，同时
预先形成了reloadData
I solved it badly using a loader and "locking" the table while preforming a reloadData
我不确定使用加载程序并锁定表是什么意思，但我确定在<之后调用 reloadData code> moveRowAtIndexPath：确实解决了问题。这不是你想要做的吗？
I am not sure what you mean by "using a loader and locking the table", but I did determine that calling reloadData after moveRowAtIndexPath: does fix the problem. Is that not something you want to do?
[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，这是另一个让我觉得有点hacky的解决方案，但是似乎运作良好（iOS 5 +）：
If you dont want to do that, here is another solution that feels a little hacky to me, but seems to work well (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];
这篇关于单元格显示在节标题的顶部的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
