iOS Table doesn't Scroll Programmatically

[Sergio10]

Hi,

I need on button clicking to scroll table programmatically. But the following code does nothing:

- (IBAction)clickAction:(id)sender
{
    [tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:NO];
    [tableView reloadData];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{		
	return 3;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{    	
	switch (indexPath.row) 
	{
		case ZERO_VALUE:
		{
			return firstCell;
		} break;
			
		case 1:
		{
			return secondCell;	
		} break;
			
		case 2:
		{
			return thirdCell;	
		} break;		
	};
}

- (UITableViewCellAccessoryType)tableView:(UITableView *)tableView accessoryTypeForRowWithIndexPath:(NSIndexPath *)indexPath 
{	
	return UITableViewCellAccessoryNone;
}

- (void)tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath 
{	
	[self tableView:tableView didSelectRowAtIndexPath:indexPath];
}

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

Guys, how to solve the problem?

 

[dejo]

- (IBAction)clickAction:(id)sender
{
    [tableView scrollToRowAtIndexPath:[COLOR="Red"][B]indexPath[/B][/COLOR] atScrollPosition:UITableViewScrollPositionTop animated:NO];
    [tableView reloadData];
}

Guys, how to solve the problem?

Where are you setting the indexPath that's used in your IBAction?

 

[Sergio10]

- (IBAction)clickAction:(id)sender
{
    NSIndexPath *indexPath = [[NSIndexPath alloc] init];
    indexPath = [NSIndexPath indexPathForRow:1 inSection:0];

    [tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:NO];
    [tableView reloadData];
}

It is also don't work.

 

[Troglodyte]

- (IBAction)clickActionid)sender
{
NSIndexPath *indexPath = [[NSIndexPath alloc] init];
indexPath = [NSIndexPath indexPathForRow:1 inSection:0];

[tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:NO];
[tableView reloadData];
}

As an aside, this will leak memory. You don't need to alloc-init the indexPath.

 

[dejo]

It is also don't work.

tableView is an instance variable that's defined and assigned elsewhere?

P.S. And if you really want to scroll to the very top, you need to use:

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:[B][COLOR="Red"]0[/COLOR][/B] inSection:0];

Rows (and sections) are zero-indexed.