Scroll Issue in IOS 13

In order to achieve scroll To bottom for a table view, I am using the below code.

extension UITableView {
    
func scrollToBottom(){
        let indexPath = IndexPath(
                row: self.numberOfRows(inSection:  self.numberOfSections -1) - 1, 
                section: self.numberOfSections - 1)
        self.scrollToRow(at: indexPath, at: .bottom, animated: true)
    }
}

This is working perfectly fine for all the devices whose versions are below 13, but in ios 13 it is not scrolling completely to last cell , it is stopping in between the last cell (approximate 40 pixel from bottom).

I also tried alternate ways by

1. setting content Offset
2. setting the scroll to visible rect all
3. having a delay for 1.0 seconds

but all of these having the same behaviour, not scrolling completely.

If you're facing this issue because of having different cells with different heights then below code will probably work for you:

private func moveTableViewToBottom(indexPath: IndexPath) {
    tableView.scrollToRow(at: indexPath, at: .bottom, animated: false)
    DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
        self.tableView.scrollToRow(at: indexPath, at: .bottom, animated: false)
    }
}

Try this

func scrollToBottom(){
    DispatchQueue.main.async {
        let indexPath = IndexPath(row: self.yourDataSourceArray-1, section: self.numberOfSections - 1)
        self.tableView.scrollToRow(at: indexPath, at: .bottom, animated: true)
    }
}

Thank Shivam Pokhriyal

It helps me work properly on iOS 13, But I don't know exactly why

Swift:

private func moveTableViewToBottom(indexPath: IndexPath) {
    tableView.scrollToRow(at: indexPath, at: .bottom, animated: false)
        if #available(iOS 13.0, *) {
            DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
        self.tableView.scrollToRow(at: indexPath, at: .bottom, animated: false)
        }
    }
}

OC:

- (void)scrollToBottomAnimated:(BOOL)animated {

NSInteger rows = [self.tableView numberOfRowsInSection:0];
    if (rows > 0) {
        NSIndexPath *indexPath = [NSIndexPath indexPathForRow:rows-1 inSection:0];
        [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:animated];
        if (@available(iOS 13.0, *)) {
            dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
                                NSInteger rows = [self.tableView numberOfRowsInSection:0];
                if (rows > 0) {
                    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:rows-1 inSection:0];
                    [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:animated];
                }
            });
        } else {
            // Fallback on earlier versions
        }
    }
}