Ios 选项卡'；s页面不显示

选项卡的页面不显示。 我写的光控器就像

import Foundation
import UIKit
class PhotoController:UIViewController,UINavigationControllerDelegate,UIImagePickerControllerDelegate{
    @IBOutlet weak var myImageView: UIImageView!

    @IBAction func PhotoSelect(_ sender: Any) {
    }

    @IBAction func PhotoSend(_ sender: Any) {
        let myPickerController = UIImagePickerController()
        myPickerController.delegate = self;
        myPickerController.sourceType = UIImagePickerControllerSourceType.photoLibrary

        self.present(myPickerController, animated: true, completion: nil)
    }

      private func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject])

    {
        myImageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage

        self.dismiss(animated: true, completion: nil)

    }
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        //myImageUploadRequest()
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }



  }

在这个控制器中，我的目标是选择照片并将其发送到服务器。 我使用的是TabbarController，但当我运行emulator时，并没有显示与PhotoController连接的主情节提要。我不知道为什么会发生这种情况，我认为至少有2个按钮显示在那里。但2个按钮并没有显示。 但是，当我运行emulator时，会显示ViewController。 ViewController是

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var webBrowser: UIWebView!
    override func viewDidLoad() {
        super.viewDidLoad()
        let url = NSURL(string:"https://www.google.com")
        let request = NSURLRequest(url:url! as URL)
        self.webBrowser.loadRequest(request as URLRequest)
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


}

在这个控制器中，谷歌网站被显示出来，一切正常。 所以，我认为某些联系是错误的，但我找不到重点。 我的主板是

与光控器和主控板的连接为

---

如何解决此问题？

是否将TabBarController设置为初始视图控制器？@SunilPrajapati是