Scroll Issue in IOS 13 - ios

Question

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
setting content Offset
setting the scroll to visible rect all
having a delay for 1.0 seconds
but all of these having the same behaviour, not scrolling completely.

Answer 1

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)
}
}

Answer 2

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)
}
}

Answer 3

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
}
}
}