问如何使用JSON提要中的数据自动填充UISearch字段

EN

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{

if ([searchText length] != 0)
{

    [searchArray removeAllObjects];

    for (get every city name from original array)
    {
        NSRange titleResultsRange = [cityname rangeOfString:searchText options:NSCaseInsensitiveSearch];

        if (titleResultsRange.length > 0 )

            <add that object into searchArray]

           //NSLog(@"items is %@",_items);
    }

}

[self.tableViewItems reloadData];

}