tableView.estimatedRowHeight = 83.0
tableView.rowHeight = UITableViewAutomaticDimension

-(CGFloat)tableView:(UITableView*)tableView heightForRowAtIndexPath:(nonnull NSIndexPath *)indexPath
{
    return UITableViewAutomaticDimension;
}

self.tableView.estimatedRowHeight = 60; // required value.

UILabel * label = [UILabel new];
    [self.contentView addSubview:label];
    NSDictionary * views = NSDictionaryOfVariableBindings(label);
//Inset 5 px
    [self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-5-[label]-5-|" options:0 metrics:nil views:views]];
    [self.contentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-5-[label]-5-|" options:0 metrics:nil views:views]];
// height >= 44
    [self.contentView addConstraint:[NSLayoutConstraint constraintWithItem:self.mainLabel attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationGreaterThanOrEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:44.0]];