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我有两个表格视图，一个有几个表格视图单元格，每个单元格打开相同的子视图，但用新数据初始化..

There are around about 100 - 200 entries into the table and I have a accessory view that is a tick that when a cell is selected it ticks the cell then loads the main view again.

如果我选择相同的单元格以获取相同的数据集，它将在屏幕中间加载先前选择的单元格（因此它知道它的索引路径）但是“取决于列表中的深度”的勾号将或不可见..

它往往在表格的前 30/40% 范围内起作用，但任何低于刻度的东西都将不可见……除非我每次来回越来越深，然后有时我可以让刻度出现在表格视图的更深部分..有人知道为什么会这样吗？

以前有没有人发生过这种性质的事情？

在进一步调查中，我认为这种方法内部出了点问题..

首先，在子视图中，一旦用户选择了一个单元格，就会调用这个方法

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

 // Navigation logic may go here. Create and push another view controller.
    [self.navigationController popViewControllerAnimated:YES]; //pops current view from the navigatoin stack

    //accesses selected cells content
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    // now you can use cell.textLabel.text

    //This if statment is based off which cell was selected in the parent view so that it knows which cell to pass the data back to
    if (parentViewSelectedIndexPath.section == 0) {
        if (parentViewSelectedIndexPath.row == 0) {
            manufactureCellTextLabel = cell.textLabel.text; //passing label text over to NSString for use with delegate (check "viewwilldissapear")
            [[self delegate] setManufactureSearchFields:manufactureCellTextLabel withIndexPath:indexPath]; //This is where I pass the value back to the mainview
        }
// a few more If statements for the other methods I can pass data too.


//--- this if block allows only one cell selection at a time
    if (oldCheckedData == nil) { // No selection made yet
        oldCheckedData = indexPath;
        [cell setAccessoryType:UITableViewCellAccessoryCheckmark];

    }
    else {
        UITableViewCell *formerSelectedcell = [tableView cellForRowAtIndexPath:oldCheckedData]; // finding the already selected cell
        [formerSelectedcell setAccessoryType:UITableViewCellAccessoryNone];

        [cell setAccessoryType:UITableViewCellAccessoryCheckmark]; // 'select' the new cell
        oldCheckedData = indexPath;
    }   
}

这会将索引路径传递给主视图方法...

   - (void) setManufactureSearchFields:(NSString *)cellLabeltext withIndexPath:(NSIndexPath *)myIndexPath
    {
        manufactureSearchObjectString = cellLabeltext;
        manufactureResultIndexPath = myIndexPath;
        [self.tableView reloadData]; //reloads the tabels so you can see the value.
    }

//然后设置在下一个方法中使用的制造结果索引路径将其传递回子视图

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Navigation logic may go here. Create and push another view controller.
    //--- Idendify selected indexPath (section/row)
    if (indexPath.section == 0) {
        //--- Get the subview ready for use
        VehicleResultViewController *vehicleResultViewController = [[VehicleResultViewController alloc] initWithNibName:@"VehicleResultViewController" bundle:nil];
        // ...
        //--- Sets the back button for the new view that loads
        self.navigationItem.backBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"Back" style: UIBarButtonItemStyleBordered target:nil action:nil] autorelease];

        // Pass the selected object to the new view controller.
        [self.navigationController pushViewController:vehicleResultViewController animated:YES];

        [vehicleResultViewController setDelegate:self];

        if (indexPath.row == 0) 
        {
            vehicleResultViewController.title = @"Manufacture";
            [vehicleResultViewController setRequestString:@"ID.xml"]; //sets the request string in searchResultsViewController
            vehicleResultViewController.dataSetToParse = @"ID"; // This is used to controll what data is shown on subview... logic
            [vehicleResultViewController setAccessoryIndexPath:manufactureResultIndexPath]; //sends indexpath back to subview for accessory tick
            vehicleResultViewController.parentViewSelectedIndexPath = indexPath;
        }


//etc etc
}

最后我将它传递给我的子视图中的方法，该方法将 indexpath 传递给 oldCheckedData

- (void)setAccessoryIndexPath:(NSIndexPath *)myLastIndexPath
{
                oldCheckedData = myLastIndexPath;
                [self.tableView reloadData]; //<<---- this is where I reload the table to show the tick...
}
4

2 回答 2

2

尝试将这些cell.accessoryType =行移动到willDisplayCell:委托函数，如下所示：

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {

    // You can move this one here too:
    cell.selectionStyle = UITableViewCellSelectionStyleNone; // no blue selection

    if (indexPath == oldCheckedData) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
    } else {
        cell.accessoryType = UITableViewCellAccessoryNone;
    } 
}

我读到该willDisplayCell:方法应该用于对像selectionStyle/这样的单元格进行任何基本的视觉相关修改accessoryType，以及cellForRowAtIndexPath:像设置文本、图像等单元格数据相关操作的方法......

于 2011-10-14T01:12:13.143 回答
0

我最近遇到了这个问题，如果在我的情况下，单元格有一个附件视图集。这个片段确保视图被删除。

 public func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

..logic here to to determine if cell should be selected...

if ( cell.accessoryView != nil) {
    cell.accessoryView?.removeFromSuperview()
    cell.accessoryView = nil
}
cell.accessoryType = .checkmark
于 2019-05-04T15:50:35.413 回答