Swift 为什么信息没有显示出来？

我创建了一个弹出窗口，但没有显示任何内容，我添加了UIViewController作为弹出窗口。为什么它不起作用

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我相信在这种情况下你不需要segue。您可以使用下面列出的示例。当你按下按钮时，它会显示一个弹出框

import UIKit

class ViewController: UIViewController, UIPopoverPresentationControllerDelegate {

  var myPopover : UIPopoverPresentationController?

  @IBAction func buttonPressed(sender: UIButton) {
    // you can init your own View Controller here
    var popOverView = self.storyboard?.instantiateViewControllerWithIdentifier("interestViewController‌​") as! interestViewController
    popOverView.preferredContentSize = CGSize(width: 250, height: 200);
    var destNav = UINavigationController(rootViewController: popOverView)
    destNav.modalPresentationStyle = UIModalPresentationStyle.Popover
    self.myPopover = destNav.popoverPresentationController
    self.myPopover?.delegate = self
    self.myPopover?.sourceView = self.view
    var theFrame = sender.frame
    self.myPopover?.sourceRect = theFrame
    destNav.modalPresentationStyle = UIModalPresentationStyle.Popover
    destNav.navigationBarHidden = true
    self.presentViewController(destNav, animated: true, completion: nil)

  }

  func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
    return UIModalPresentationStyle.None
  }

}

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如何向弹出窗口添加文本或图片？如何初始化自己的ViewController。我是swiftI的新手，我添加了这个'let storyboard:UIStoryboard=UIStoryboard（名称：“Main”，bundle:nil）var menuViewController:interestViewController=storyboard.instanceeviewcontrollerwhiteIdentifier（“interestViewController”）作为！interestViewController'，但我得到了一个SIBABRT错误。请尝试以下操作：var popOverView=self.storyboard？。实例化EVIEWControllerWithiIdentifier（“interestViewController”）为！有趣的视频控制器这是我点击按钮得到的错误

import UIKit

class ViewController: UIViewController, UIPopoverPresentationControllerDelegate {

  var myPopover : UIPopoverPresentationController?

  @IBAction func buttonPressed(sender: UIButton) {
    // you can init your own View Controller here
    var popOverView = self.storyboard?.instantiateViewControllerWithIdentifier("interestViewController‌​") as! interestViewController
    popOverView.preferredContentSize = CGSize(width: 250, height: 200);
    var destNav = UINavigationController(rootViewController: popOverView)
    destNav.modalPresentationStyle = UIModalPresentationStyle.Popover
    self.myPopover = destNav.popoverPresentationController
    self.myPopover?.delegate = self
    self.myPopover?.sourceView = self.view
    var theFrame = sender.frame
    self.myPopover?.sourceRect = theFrame
    destNav.modalPresentationStyle = UIModalPresentationStyle.Popover
    destNav.navigationBarHidden = true
    self.presentViewController(destNav, animated: true, completion: nil)

  }

  func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
    return UIModalPresentationStyle.None
  }

}