UIImagePickerController: didFinishPickingMediaWithInfo not being called

Hope you're all doing well. Wondered if anyone could help me understand why Xcode fails to play nice with me....

I have broken the code into sections below in order to allow me to select a profile photo from UIImagePicker:

1. WORKS: Assigning the delegate class for both ImagePicker & NavigationController
2. WORKS: Instantiating the UIImagePicker variable
3. WORKS: Load ImagePickerViewController and enable to select an image
4. FAILS: Added additional functions for closing and finishing picking with a UIImagePicker but neither ever get called? What have I done wrong?

Thanks in advance!

class ProfileVC: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var imagePicker: UIImagePickerController!

override func viewDidLoad() {
    super.viewDidLoad()

    imagePicker = UIImagePickerController()
    imagePicker.delegate = self
}

@IBAction func selectPhotoPressed(sender: UITapGestureRecognizer) {
    if UIImagePickerController.isSourceTypeAvailable(.PhotoLibrary) {
        self.imagePicker.sourceType = .PhotoLibrary
    } else {
        self.imagePicker.sourceType = .Camera
    }
    imagePicker.allowsEditing = true
    imagePicker.mediaTypes = [kUTTypeImage as String]
    self.presentViewController(imagePicker, animated: true, completion: nil)
}

func imagePickerControllerDidCancel(picker: UIImagePickerController) {
    self.dismissViewControllerAnimated(true, completion: nil)
}

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo image: UIImage, editingInfo: [String : AnyObject]?) {
    headerView.profilePhoto.contentMode = .ScaleAspectFill
    headerView.profilePhoto.image = image
    imagePicker.dismissViewControllerAnimated(true, completion: nil)
    uploadImage(image)
}