title: i want dynamic get uitableview total height,not uitableviewcell,
body: <p>I want dynamic get uitableview total height,not <code>UITableViewCell</code>, not frame, and i find <code>self.tableView.contentSize.height=0</code> for the first time, so i am very trouble in this problem,i need help please.</p>
  
  <p>thanks...</p>