Question

我有桌面视图，当我触摸单元格时，会出现detailTextLabel。我实现了搜索，但是didSelectRowAtIndexPath对搜索结果数组不起作用。我刚从cellForRowAtIndexPath复制了代码。

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
    {
        NSPredicate *resultPredicate = [NSPredicate predicateWithFormat:@"name contains[c] %@", searchText];
        self.searchResults = [self.cards filteredArrayUsingPredicate:resultPredicate];
    }

    -(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
    {
        [self filterContentForSearchText:searchString
                                   scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                          objectAtIndex:[self.searchDisplayController.searchBar
                                                         selectedScopeButtonIndex]]];

        return YES;
    }


    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
        UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:@"Card Cell" forIndexPath:indexPath];

        if (tableView == self.searchDisplayController.searchResultsTableView) {
            Card *card = [self.searchResults objectAtIndex:indexPath.row];

            [cell.textLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"name"]]];
            [cell.detailTextLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"otherSide"]]];
            cell.detailTextLabel.hidden = YES;

        } else {
            Card *card = [self.cards objectAtIndex:indexPath.row];

            [cell.textLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"name"]]];
            [cell.detailTextLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"otherSide"]]];
            cell.detailTextLabel.hidden = YES;
        }

        return cell;
    }


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

        [self.tableView beginUpdates];

        UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:@"Card Cell" forIndexPath:indexPath];
        if (tableView == self.searchDisplayController.searchResultsTableView) {
            Card *card = [self.searchResults objectAtIndex:indexPath.row];

            [cell.textLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"name"]]];
            [cell.detailTextLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"otherSide"]]];
            cell.detailTextLabel.hidden = NO;
        } else {
            Card *card = [self.cards objectAtIndex:indexPath.row];

            [cell.textLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"name"]]];
            [cell.detailTextLabel setText:[NSString stringWithFormat:@"%@", [card valueForKey:@"otherSide"]]];
            cell.detailTextLabel.hidden = NO;
        }

        [self.tableView endUpdates];

    }

Answer 1

cellForRowAtIndexPath和didSelectRowAtIndexPath之间存在一些显着差异。 cellForRowAtIndexPath创建一个单元格或获取现有的单元格堆栈，您将输入属性并在显示之前将其返回。在didSelectRowAtIndexPath中，您不会在参数中获取该单元格，因此您必须调用[tableview cellForRowAtIndexPath]而不是[self.tableView dequeueReusableCellWithIdentifier:@"Card Cell" forIndexPath:indexPath];来获取单元格并设置属性。

还要确保已设置tableview的委托。

didSelectRowAtIndexPath不适用于搜索结果

1 个答案: