Question

我可以计算每个部分的项目选择数量。

然而，我想知道如何能够在一个部分中跟踪所有部分。

以下rowcount仅返回当前部分中的项目数，但我还需要跟踪其他部分中的项目数。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath   *)indexPath
{
    NSInteger rowcount =  [[self.comboTableView indexPathsForSelectedRows] count];
}

顺便说一句，用户可以根据需要选择任意数量的项目。

self.comboTableView.allowsMultipleSelection = YES;

Answer 1

您可以从所有部分获取所有选定的行。 indexPathsForSelectedRows将返回表格视图的NSArray<NSIndexPath*>。不适用于单个部分

- (void)selectedItem: (UITableView *)tableView {
    NSArray <NSIndexPath*> *selectedIndexPaths = [tableView indexPathsForSelectedRows];
    for (NSIndexPath *indexpath in selectedIndexPaths) {
        NSLog(@"Section index : %ld", indexpath.section);
        NSLog(@"Row index : %ld", indexpath.row);
    }
}

Answer 2

这是我的自定义逻辑，用于监视当前选定的行。这个逻辑不会影响你当前的任何逻辑。

在.h文件中声明变量，并将init声明为 viewDidLoad 方法。

dicSelectedRow = [NSMutableDictionary new];

在 cellForRowAtIndexPath 和 didSelectRowAtIndexPath mehtod中进行以下更改。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

        // put your allocation code at here      

        // To check if current section's row is selected or not...
        NSString *strCurrentSection = [NSString stringWithFormat:@"%d",(int)indexPath.section];
        NSString *strCurrentIndexPathRow = [NSString stringWithFormat:@"%d",(int)indexPath.row];
        NSMutableArray *aryCurrentSelectedRow = [NSMutableArray new];
        [aryCurrentSelectedRow addObjectsFromArray:dicSelectedRow[strCurrentSection]];
        if(aryCurrentSelectedRow.count > 0)
        {
            if([aryCurrentSelectedRow containsObject:strCurrentIndexPathRow])
            {
                // Your row is selected
            }
            else
            {
                // Your row is not selected
            }
        }

        aryCurrentSelectedRow = nil;


}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Here we need to check if row is there into dic or not.
    NSString *strCurrentSection = [NSString stringWithFormat:@"%d",(int)indexPath.section];
    NSString *strCurrentIndexPathRow = [NSString stringWithFormat:@"%d",(int)indexPath.row];
    if(![dicSelectedRow valueForKey:strCurrentSection])
    {
        // We need to add key first....
        [dicSelectedRow setObject:[NSMutableArray new] forKey:strCurrentSection];
    }


    // Now we need to check if Current Selected Row is there or not.
    NSMutableArray *aryCurrentSelectedRow = [NSMutableArray new];
    [aryCurrentSelectedRow addObjectsFromArray:dicSelectedRow[strCurrentSection]];

    if([aryCurrentSelectedRow containsObject:strCurrentIndexPathRow])
        [aryCurrentSelectedRow removeObject:strCurrentIndexPathRow];
    else
        [aryCurrentSelectedRow addObject:strCurrentIndexPathRow];


    if(aryCurrentSelectedRow.count > 0)
    {
        // If current selection is having value then we replace this to main dic.
        [dicSelectedRow setObject:aryCurrentSelectedRow forKey:strCurrentSection];
    }
    else
    {
        // Remove key from Dic.
        [dicSelectedRow removeObjectForKey:strCurrentSection];
    }

    NSLog(@"%@",dicSelectedRow.description);

    [_tblData reloadData];
}

干杯...

Answer 3

希望这会有所帮助：

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let selectedRows: Int? = tableView.indexPathsForSelectedRows()?.count
    var selectedCell: UITableViewCell?
    var selectedCellText: String
    var selections = [Any]()
    for index: IndexPath in tableView.indexPathsForSelectedRows() {
        selectedCell = tableView.cellForRow(at: index)
        selectedCellText = selectedCell?.textLabel?.text
        selections.append(selectedCellText)
    }
    print("Total selections: \(Int(selectedRows))")
    print("selections: \(selections)")
}

跟踪每个部分中所选项目的数量

3 个答案: