title: Same View controller in Tab bar controller for 4 tabs is giving wrong selected tabcontroller selected index
body: <p>I am trying to make a template for my app... lets say my app loads the same view controller which has a CollectionView for 4 tabs. According to selected index, I have to load the contents into collection view. I am setting up the tab bar manually from Appdelegate. My question is Is this possible like instantiating same viewcntroller for all 4 tabs of Tabbarcontroller at a time. if yes, how will i know correctly that which index is selected?</p>
  
  <p>Code for tabBarcontroller in Appdelegate</p>
  
  <pre><code>                self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
                  let tabBarController = UITabBarController()
  
                  let storyboard : UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
  
                  let firstImage = UIImage(named: "image1")
                  let secondImage = UIImage(named: "image2")
                  var controllers = [UIViewController]()
                  for var i = 0; i &lt; self.myList.count; i++ {
  
                   let vc : ViewControllerTwo = storyboard.instantiateViewControllerWithIdentifier("view1") as! ViewControllerTwo
  
                      if(i == 0 || i == 3)
                      {
                          vc.tabBarItem = UITabBarItem(
                              title: self.myList[i],
                              image: firstImage,
                              tag: i)
                          controllers.append(vc)
                      }
                      else
                      {
                          vc.tabBarItem = UITabBarItem(
                              title: self.myList[i],
                              image: secondImage,
                              tag: i)
                          controllers.append(vc)
                      }
  
  
                  }
  
  
                  self.tabBarController.viewControllers = controllers
                  self.window?.rootViewController = self.tabBarController
  
  
                  self.self.window?.rootViewController = self.tabBarController
                  self.window?.makeKeyAndVisible()
  </code></pre>