Change tableview datasource with two UIButtons

Question

I'm having a UITableView and its data source is an NSMutableArray which is actually an parsed XML file; In the same view I have two UIButtons with the same action method, how I'm able to toggle the tableview's datasource?
When pressing A button to load dataSource1 and B to load dataSource2
- (void)buttonsAction: (id)sender {
    BOOL activateSecond = _firstButton.selected;
    _firstButton.selected = !activateSecond;
    _secondButton.selected = activateSecond;
    dataSource1 = [[NSMutableArray alloc]init];
    nodecontent = [[NSMutableString alloc]init];
    NSString *xmlURL = @"http://mydomain.com/file.xml";
    NSData *xmlData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:xmlURL]];
    xmlParserObject = [[NSXMLParser alloc]initWithData:xmlData];
    [xmlParserObject setDelegate:self];
    [xmlParserObject parse];
    [xmlData release];
Any clue?

Answer 1

You could change the binding of the table from within method wdDoModifyView(). But if you change the data source of a table, you also have to change the bindings of all table cell editors because these must point to attributes inside the data source node (or subnodes of it).
Another possibility would be to use 2 tables that are exchanged dynamically using the "visible" property.
But: Why not simply exchange the data source node's element collection and not using different nodes at all?
Armin