iOS UITableView Scroll to bottom of section

问题

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.

回答1:

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.

回答2:

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];
});

回答3:

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];

回答4:

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)
    }
}

回答5:

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)

来源：https://stackoverflow.com/questions/26160484/ios-uitableview-scroll-to-bottom-of-section

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ios

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uitableview

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