title: UIPickerView not displaying
body: <p>I have a UIPickerView on a UIView.  I've implemented its protocol in the .h and delegates in the .m files:</p>
  
  <pre><code> &lt;UIPickerViewDataSource, UIPickerViewDelegate&gt;
  </code></pre>
  
  <p>In IB, I've connected the above to the picker, which I also have an IBoutlet for.  The methods look like this:</p>
  
  <pre><code>- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView {
  return 1;
  }
  
  - (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component {
  return [self.arr count];
  }
  
  - (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row  forComponent:(NSInteger)component {
  return @"test";
  }
  
  - (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
  //do something
  }
  </code></pre>
  
  <p>Any ideas which piece I'm missing to get the picker working?</p>