Question

我有一个tableview，它加载了一个名为self.annotationToSort的数组，并使用UISearchBar在tableview中搜索对象并更新结果。如果选择了tableview中的项目，则会显示详细视图以及相应的索引路径信息。

我遇到的问题是，当使用搜索栏时，我在搜索中得到2个结果项，单元格中的值显示正确，但是我点击结果B，我得到对象A传递给细节视图控制器。如果我点击A，我也会得到A.

以下是相关代码：

#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    if ([self.annotationsToSort count] == 0) {
        return 1;
    } else if (tableView == self.searchDisplayController.searchResultsTableView) {
        return [filteredResultsArray count];
    } else {
        return [self.annotationsToSort count];
    }
}

#pragma mark Content Filtering
-(void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {
    [self.filteredResultsArray removeAllObjects];
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(SELF.name contains[c] %@) OR (SELF.ciudad contains[c] %@)", searchText,searchText];
    [self.filteredResultsArray = [NSMutableArray arrayWithArray:[self.annotationsToSort filteredArrayUsingPredicate:predicate]] retain];
}

#pragma mark - UISearchDisplayController Delegate Methods
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
    [self filterContentForSearchText:searchString scope:
     [[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:[self.searchDisplayController.searchBar selectedScopeButtonIndex]]];
    tableType = @"FILTER";
    return YES;
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption {
    [self filterContentForSearchText:self.searchDisplayController.searchBar.text scope:
     [[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];
    return YES;
}


- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
    NSLog(@"indexpath selected %@", indexPath);

    //Check if using normal or search array
    if ([tableType isEqualToString:@"FILTER"]) {
        MyLocation *sendingLocation = [self.filteredResultsArray objectAtIndex:indexPath.row];
        DetailViewController *destinationViewController = segue.destinationViewController;
        destinationViewController.receivedLocation = sendingLocation;
        NSLog(@"indexpath selected filter %@", indexPath);
    } else {
        MyLocation *sendingLocation = [self.annotationsToSort objectAtIndex:indexPath.row];
        DetailViewController *destinationViewController = segue.destinationViewController;
        destinationViewController.receivedLocation = sendingLocation;
        NSLog(@"indexpath selected regular %@", indexPath);
    }
}

我可以看到在过滤tableview时索引路径被记录为null。它总是返回objectAtIndex：0。

Answer 1

你不应该做NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];，因为有时候你会问错误的表格视图，它会返回nil（当访问行数为零时，会返回结果）。

相反，请检查您是否已过滤，并询问相应的表视图以获取索引。

为什么UISearchBar tableview索引路径始终返回objectAtIndex：0

1 个答案: