Searching a table view with UISearchBar

Question

I am using this code to search through a UItableView:

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



if(searchText.lengt         


        

Answer 1

Implement - (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar delegate method of UISearchBar. In that add all objects(initial objects in table) in filteredTableData array and reload table.

   -(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
    {       
        [filteredTableData removeAllObjects];
        [filteredTableData addObjectsFromArray:self.itemArray];
        [tableView reloadData];
    }

Also you don't need to maintain flag isFiltered if you are using it for choosing data source array for reloading table(in table view data source methods). e.g.

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
   if(isFiltered) 
      return filteredTableData.count 
   else
      return self.itemArray.count
}

If you maintain data in filteredTableData array all time, you don't need to do this. Your method will look like-

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
      return filteredTableData.count 
}

Initially in init or viewDidLoad method of controller add all objects in filteredTableData and use only this array for reloading table.

Hence your method will look like-

 -(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
 {
     if(searchText.length == 0)
     {
         [filteredTableData removeAllObjects];
         [filteredTableData addObjectsFromArray:self.itemArray];
     }
     else
     {
        [filteredTableData removeAllObjects];

        for (NSString* string in self.itemArray)
        {
            NSRange nameRange = [string rangeOfString:searchBar.text options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch)];
            if(nameRange.location != NSNotFound)
            {
                [filteredTableData addObject:string];
            }
        }
     }
     [tableView reloadData]; 
    }