My approach:
I first subclass UITextField and add an indexPath property. In the cellFor... Method i hand over the indexPath property.
Then I add following code:
UITableViewCell *cell = [self.tableView cellForRowAtIndexPath:textField.indexPath];
CGPoint cellPoint = [cell convertPoint:textField.center toView:self.tableView];
[UIView animateWithDuration:0.3 animations:^(void){self.tableView.contentOffset = CGPointMake(0, cellPoint.y-50);}];
to the textFieldShould/WillBegin...etc.
When the Keyboard disappears you have to reverse it with:
[UIView animateWithDuration:0.3 animations:^(void){self.tableView.contentOffset = CGPointMake(0, 0);}];