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iOS: scrollToRowAtIndexPath doesn't display correct top indexpath for last page

I am trying to scroll tableview programmatically as coded following. Please note that I have increased the content size so I can see few last few remaining rows. I can scroll manually correctly to get required indexpath at top but programmatically it's not happening.

[tableview reloadData];

CGSize size = tableview.contentSize;
size.height += 1000;
tableview.contentSize = size;

int rows = [tableview numberOfRowsInSection:0];
int numberofRowsInView = 17;
for (int i = 0; i < ceil((float)rows/numberofRowsInView); i++) {
[tableview scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:i * numberofRowsInView inSection:0] atScrollPosition:UITableViewScrollPositionTop animated:NO];
....
}
For total rows 60, I expect this code to return cell views of 0-16, 17-33, 34-50, 51-59 but for the last scroll it returns 43-59 i.e. full 17 rows view while based on above code, top indexpath should be 51 for the last page!

Can someone please help me to sort this out. Thanks.

Replies

  • dev666999dev666999 Posts: 3,613New Users @ @ @ @ @
    edited July 2013
    "ceil" rounds up to the nearest integer.

    Insert this inside and at the beginning of your FOR loop...ie make it the first line inside the loop.

    if(i == 3)
    numberofRowsInView = 9;


    You can also use...

    if(ceil((float)rows/numberofRowsInView) == 3)
    numberofRowsInView = 9;


    The above two may not be the best way to do it, but it gets the job done.
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