Uitableview NSInvalidArgumentException-发送到实例的选择器无法识别

我正在使用以下函数使用SearchDisplayController进行搜索

- (void)handleSearchForTerm:(NSString *)searchTerm{

[self.searchResults removeAllObjects]; // First clear the filtered array.

FMDatabase *db = [FMDatabase databaseWithPath:[Utility getDatabasePath]];


[db open];


FMResultSet *results = [db executeQuery: [NSString stringWithFormat:@"SELECT * FROM periods where (searchstartyear <= %@)  AND (searchendyear >= %@)", searchTerm, searchTerm]];

    NSMutableArray *array = [[NSMutableArray alloc] init ];
    [array removeAllObjects];
    while ([results next]) {
        Periods *searchPeriod = [[Periods alloc] init];
        searchPeriod.periodname = [results stringForColumn:@"PeriodName"];
        searchPeriod.startyear = [results stringForColumn:@"StartYear"];
        searchPeriod.endyear = [results stringForColumn:@"EndYear"];
        searchPeriod.thumb = [results stringForColumn:@"Thumb"];
        searchPeriod.childid = [results stringForColumn:@"ChildID"];
        [array addObject:searchPeriod];           
    }
    [self.searchResults addObject:array];


[db close];}    

…更具体地说，当执行此行时：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"PeriodsCell";

    UITableViewCell *cell = [self.mainTableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    // Configure the cell...

    if (tableView != [[self searchDisplayController] searchResultsTableView])
    {

        NSMutableArray *array = [periodsdataarray objectAtIndex:indexPath.section];
        NSMutableDictionary *dictionary = [array objectAtIndex:indexPath.row];




        UILabel *childIDLabel = (UILabel *)[cell viewWithTag:999];
        childIDLabel.text = [dictionary valueForKey:@"ChildID"];
        UILabel *titleLabel = (UILabel *)[cell viewWithTag:100];
        titleLabel.text = [dictionary valueForKey:@"PeriodName"];


        UILabel *previewLabel = (UILabel *)[cell viewWithTag:101];
        previewLabel.text = [NSString stringWithFormat:@"%@ - %@",[dictionary valueForKey:@"StartYear"],[dictionary valueForKey:@"EndYear"]];
        UIImageView *imageview = (UIImageView *)[cell viewWithTag:102];
        [imageview setImage:[UIImage imageNamed:[dictionary valueForKey:@"Thumb"]]];
    }
    else
    {
        Periods *periodcell = [self.searchResults objectAtIndex:indexPath.row];

        cell.tag = 666;
        UILabel *childIDLabel = (UILabel *)[cell viewWithTag:999];
        childIDLabel.text = periodcell.childid;
        UILabel *titleLabel = (UILabel *)[cell viewWithTag:100];
        titleLabel.text = periodcell.periodname;


        UILabel *previewLabel = (UILabel *)[cell viewWithTag:101];
        previewLabel.text = [NSString stringWithFormat:@"%@ - %@",periodcell.startyear,periodcell.endyear];
        UIImageView *imageview = (UIImageView *)[cell viewWithTag:102];
        [imageview setImage:[UIImage imageNamed:periodcell.thumb]];


    }

    return cell;
}

childIDLabel.text = periodcell.childid;

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我做错了什么？

我在handleSearchForTerm函数中出错

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我使用NSMutableArray*数组保存Periods对象的值，然后将该数组添加到searchResults数组中（期望searchResults保存Periods）。解决方案非常简单，只需将句点直接添加到我的searchResults数组和ditching数组…

选择器发送到的实例的类别是什么？很抱歉，但我不确定我是否理解您的问题..您提到您遇到了一个异常。通常异常会提到类名。谢谢您的回复。这是异常消息的全文：**由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：'-[\uu NSArrayM childid]：未识别的选择器已发送到实例0xe2b5a70'，感谢您的时间。我能找到我的错误。。。在我的搜索函数中，我在搜索结果数组中添加了一个数组，而不是Periods对象，

childIDLabel.text = periodcell.childid;