UISplitViewController on iPhone 6 Plus

Question

I make an application on iPhone and iPad. I have the UISplitViewController and I use it on iPad. When I launch my application on iPhone 6 Plus (simulator) UISplitViewController doesn't work. (It's good work on iPad 3 or iPad Air 2 and iPhone 5s). I make following into my code.

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
    if (UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Pad) {
        performSegueWithIdentifier("showDetailParse", sender: nil)
    } else if (UIDevice.currentDevice().userInterfaceIdiom == .Phone) {
        performSegueWithIdentifier("showParse", sender: nil)
    }
}

My screen from iPad works well

My screen from iPhone 6 Plus (simulator)

UPDATE: I updated my code which defines on which device it works and it did work! Into the code I define the height of a current device and if bigger than 2000 pixels I use segue for iPad. But I don't like this solution. Are there any ideas?

My updated code is below.

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
    var screen = UIScreen.mainScreen().currentMode?.size.height
    if (UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Pad) || screen >= 2000 && UIDevice.currentDevice().orientation.isLandscape == true {
        performSegueWithIdentifier("showDetailParse", sender: nil)
    } else if (UIDevice.currentDevice().userInterfaceIdiom == .Phone) {
        performSegueWithIdentifier("showParse", sender: nil)
    }
}

Answer 1

From what I can see on the screen you've provided - you have embedded UITabBarController in your MasterViewController. I have done this previously as well and the trick is to not forget where you're pushing - not in the UINavigationController because that's not the Master, the Master is the UITabBarController.

I did this:

self.tabBarController?.performSegueWithIdentifier("showDetail", sender: nil)

Which worked for me well for this Storyboard layout: