iOS - UITableView not scrolling to bottom

Add this code in you viewDidload :

Swift 5

let indexPath = IndexPath(item: <Row Index>, section: <Section Index>)
tableView.reloadRows(at: [indexPath], with: .automatic)

Objective C

NSIndexPath *myIndexPath = [NSIndexPath indexPathForRow:AddYourLastIndex inSection:0];
[self.tbl_presentation selectRowAtIndexPath:myIndexPath animated:YES scrollPosition:UITableViewScrollPositionBottom];

try this code.it will scroll to bottom of tableview

 [self.tableview setContentOffset:CGPointMake(0, self.tableview.contentSize.height-self.tableview.frame.size.height) animated:YES];