Transition from Modal View to Next VC in a TabBar and NavBar - ios

Question

I'm using Swift 2 and xcode 7.1.1.
My app is a tabbar + navigationbar based application.
What I'd like to do:
From my first viewcontroller (CollectionVC) I have a collectionview of images(tabbar at bottom and navbar at top). When you select an image, I transition programmatically to a modalviewcontroller (ImageZoomVC) that allows them to zoom on the image (no tabbar or navbar). From the ImageZoomVC I want to transition programmatically to the UserProfileVC. The UserProfileVC should have the tabbar and navbar like the first view. The navbars back button should also take us back to the ImageZoomVC.
This workflow is similar to facebook. When you select an image, you go to a black screen with just that image and some more info. You can click on anyone tagged in the image and it will push their profile onscreen with the tabbar and navbar back in place.
The Problem:
Once in the ImageZoomVC, I can't transition to the UserProfileVC without losing the tabbar and navbar. I've been able to add a navbar programmatically but there is no back button, and setting a back button hasn't worked. Also, there is no tabbar.
Code:
From my CollectionVC, I transition to the ImageZoomVC from my collectioncell like this:
#IBAction func PhotoButtonPressed(sender: UIButton) {
let imageZoom = ImageZoomVC()
imageZoom.showFrom(self.parentView!)
}
Here is the showFrom function that presents the ImageZoomVC modally. This code is inside the ImageZoomVC:
public func showFrom(viewController: UIViewController) {
//Some stuff here, edited for length
viewController.presentViewController(self, animated: false) {
UIView.animateWithDuration(ImageZoomVC.TransitionAnimationDuration,
delay: 0,
options: [.BeginFromCurrentState, .CurveEaseInOut],
animations: {
[weak self] in
self?.collectionView.alpha = 1
self?.collectionView.transform = CGAffineTransformIdentity
},
completion: {
[weak self] finished in
self?.view.userInteractionEnabled = finished
}
)
}
}
This is the code I'm attempting to use to transition to the UserProfileVC with navbar and tabbar. This doesn't work. It will present the VC, but there is no tabbar or back button.
func userSelected (sender: UIButton) {
let vc = self.presentingViewController?.storyboard?.instantiateViewControllerWithIdentifier("User Profile") as! UserProfileVC
let newNav = UINavigationController(rootViewController: vc)
newNav.navigationBar.barTintColor = UIColor().specialPurple()
newNav.navigationBar.translucent = false
self.presentViewController(newNav, animated: true, completion: nil)
}
A couple notes: The ImageZoomVC doesn't exist in storyboard. It is called and instantiated programmatically.
The ImageZoomVC is based off Agrume from Github found here:
https://github.com/JanGorman/Agrume
I'd like to push the UserProfileVC like facebook does. This current code presents it from the bottom. The code pushViewController is not recognized here in xCode.
Let me know what you think. All thoughts are welcome. Thanks.