title: cellForRowAtIndexPath not called but numberOfRowsInSection called
body: <p>I have a simple problem but I can't understand what is. 
  I have a <code>UIViewControler</code> (called <code>RootController</code>) that load a <code>UIView</code> (called <code>SecondView</code>) that contain a <code>tableView</code>. The problem is that the <code>UIView</code> call the <code>numberOfSectionsInTableView</code> and the <code>numberOfRowsInSection</code> but don't call <code>cellForRowAtIndexPath</code> and the table view is not displayed. 
  The code of the <code>RootViewController</code> is:</p>
  
  <pre><code>SecondView *secondView = [[seconddView alloc] initWithFrame:CGRectMake(0, 60, self.view.bounds.size.width, self.view.bounds.size.height)];
  [self.view addSubview:secondView];
  </code></pre>
  
  <p>And the code of the <code>SecondView</code> is:</p>
  
  <pre><code>@interface SecondView () &lt;UITableViewDelegate, UITableViewDataSource&gt;
  @property (nonatomic,retain) UITableView *table;
  @end
  
  @implementation SecondView
  @synthesize table;
  
  - (id)initWithFrame:(CGRect)frame {
     self = [super initWithFrame:frame];
     if (self) {
     self.table = [[UITableView alloc] init];
     self.table.delegate = self;
     self.table.dataSource = self;
     [self addSubview:self.table];
     }
   return self;
  }
  
  - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
       cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
       }
    cell.textLabel.text = @"Prova";
    return cell;
  }
  
  - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
     return 5;
  }
  
  - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
     return 1;
  }
  </code></pre>
  
  <p>Can you help me to find the problem? Thank you.</p>