Reload table with a snapshot transition

reload-table.m

// From https://github.com/facebookarchive/AsyncDisplayKit/issues/616#issuecomment-133422166

- (void)reloadData
{
  UIView *snapshot = [_tableView snapshotViewAfterScreenUpdates:NO];
  [self.view insertSubview:snapshot aboveSubview:_tableView];

  [_tableView beginUpdates];
  [_tableView reloadData];
  [_tableView endUpdatesAnimated:NO completion:^(BOOL completed) {
    [UIView animateWithDuration:1 animations:^{
      snapshot.alpha = 0;
    } completion:^(BOOL finished) {
      [snapshot removeFromSuperview];
    }];
  }];
}