title: UIPickerView not showing in popover
body: <p>I have created a UIViewController in my storyboard with a UIPickerView inside. When I perform a manual segue to show this view controller as a popover, the popover is empty.</p>
  
  <p>When debugging I see that my viewDidLoad is called, but the UiPickerViewDataSource and UIPickerViewDelegate functions are not called.</p>
  
  <p>First I thought I had made some mistake with my UIPickerView datasource and delegate. But I ran my application with the UIViewController with the UIPickerView as initial view and the picker was shown as expected.</p>
  
  <p>The picker view code is as follows:</p>
  
  <pre><code>import UIKit
  
  class PickerVC: UIViewController, UIPickerViewDataSource, UIPickerViewDelegate {
  
      @IBOutlet weak var pickerView: UIPickerView!
  
      var pickerDataSource = ["White", "Red", "Green", "Blue"];
  
      override func viewDidLoad() {
          super.viewDidLoad()
      }
  
      // MARK: - UIPickerViewDataSource
  
      func numberOfComponentsInPickerView(pickerView: UIPickerView) -&gt; Int {
          return 1
      }
  
      func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -&gt; Int {
          return pickerDataSource.count;
      }
  
      // MARK: - UIPickerViewDelegate
  
      func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -&gt; String! {
          return pickerDataSource[row]
      }
  
      func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int)
      {
          if(row == 0) {
              self.view.backgroundColor = UIColor.whiteColor();
          } else if(row == 1) {
              self.view.backgroundColor = UIColor.redColor();
          } else if(row == 2) {
              self.view.backgroundColor =  UIColor.greenColor();
          } else {
              self.view.backgroundColor = UIColor.blueColor();
          }
      }
  }
  </code></pre>
  
  <p>Can someone explain why the UIPickerView is not working within the popover?</p>