title: UITableView doesn't scroll
body: <p>So, this is my view:</p>
  
  <p><img src="https://i.stack.imgur.com/5b51j.png" alt="enter image description here"></p>
  
  <p>and this is my UItableViewDelegate and DataSource</p>
  
  <pre><code>-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
  {
      return 1;
  }
  
  -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
  {
      return 20;
  }
  
  -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
  {
      UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"course"];
      cell.textLabel.text = [NSString stringWithFormat:@"%i" ,arc4random() % 10];
      cell.detailTextLabel.text = [NSString stringWithFormat:@"%i" ,arc4random() % 10];
      return cell;
  }
  </code></pre>
  
  <p>And this is the result:</p>
  
  <p><img src="https://i.stack.imgur.com/siec4.png" alt="enter image description here"></p>
  
  <p>The problem is that the UItableView doesn't scroll. never. I really can't figure out why...
  Someone can help me?</p>