iOS UITableView Scroll to bottom of section

Question

I am going to make a tableview with 2 sections inside it. I can add cells to every section programmatically and when i add, i scroll to the end of tableview using

[_tableView setContentOffset:CGPointMake(0, CGFLOAT_MAX)];

My question is how can i scroll to the end of the section 0, so that when user add a cell to section 0, tableview scroll dynamically to the last cell in section 0.

thanks.

score 22 · Accepted Answer · edited Sep 23 '15 at 11:03

22

You can try with this code:

int yourSection = 2;
int lastRow = [tableView numberOfRowsInSection:yourSection] - 1;
[tableView scrollToRowAtIndexPath:[NSIndexPath lastRow inSection:yourSection] atScrollPosition:UITableViewScrollPositionBottom animated:YES];

You get the numbers of rows in your section, then scroll to that indexPath.

edited Sep 23 '15 at 11:03

vahotm

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answered Oct 02 '14 at 12:19

Benetz

447
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18

This will give you an index out of bounds on that row number. You need to subtract 1 – Moriya Jul 29 '15 at 09:41
1

Always remember to check if that section exist and have more than that rows count, or it will crash.. – Benetz Jul 29 '15 at 10:17

score 15 · Answer 2 · answered May 13 '15 at 15:29

15

All the suggestions above are correct, at least based on the docs. But it did not work in my case - I could not get the scroll to show the last row in the table view. I had to add a delay in scrolling to make that work.

- (void)scrollToTheBottom:(BOOL)animated
{
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:rowCount-1 inSection:0];
    [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:animated];
}

I called the above as:

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [self scrollToTheBottom:YES];
});

answered May 13 '15 at 15:29

Shirish Kumar

1,532
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23

Thank you. I had a lot of computing in one of my section and no scrolling solution would work except for this one. – wheeliez May 28 '15 at 12:05
Thank you. This solutions fixes the problem of the last cell not being visible when you scroll to the last cell. – Sean Dev Jun 17 '15 at 14:44
Thnks a Lot for this, I try a Lot but can't work any code but your code is working for me thnks again.. – Super Developer Aug 03 '16 at 11:08

score 4 · Answer 3 · answered Oct 02 '14 at 12:24

4

when you inserting row at end you have its index path, you can use scrollToIndexPath method of tableview to scroll

[self.liveChannelsTable scrollToRowAtIndexPath:IndexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];

answered Oct 02 '14 at 12:24

Adnan Aftab

14,377
4
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score 3 · Answer 4 · answered Dec 03 '15 at 20:22

3

Just in case, this is solution in Swift:

extension UITableView {
    func scrollToBottom(animated: Bool = true) {
        let sections = self.numberOfSections
        let rows = self.numberOfRowsInSection(sections - 1)
        self.scrollToRowAtIndexPath(NSIndexPath(forRow: rows - 1, inSection: sections - 1), atScrollPosition: .Bottom, animated: true)
    }
}

answered Dec 03 '15 at 20:22

Valentin Shergin

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2
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53

I just have a small addition. Last line of the function should be: `self.scrollToRowAtIndexPath(NSIndexPath(forRow: rows - 1, inSection: sections - 1), atScrollPosition: .Bottom, animated: animated)` – moody Aug 20 '21 at 09:42

score 1 · Answer 5 · answered Oct 11 '16 at 23:41

1

In Swift 3 it's been updated to:

let indexPath = IndexPath(row: self.numberOfRowsInSection(0) - 1), section: 0)
self.commentsTableView.scrollToRow(at: indexPath, at: .bottom, animated: false)

answered Oct 11 '16 at 23:41

Daniel Que

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iOS UITableView Scroll to bottom of section

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