Swift 4 Viewcontroller dependency Injection in Class - ios

Question

I'm learning swift and trying to figure out how to add a view controller as a dependency into my Class I'm creating. Ideally I'd like to add it in the init stage so it's 'dependable'
But I can't quite figure it out - so I'm hoping someone can help me along the way. The error I'm getting is: Property 'self.homeController' not initialized at super.init call
Basically I have a Class that creates an overlay with a pop-up on it that has a UICollectionView that is clickable. When the you click the item, the menu animates out and THEN on complete fires the function from the homecontroller.
class SettingLauncher: NSObject, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
private let homeController: HomeController
func showSettings(){
// window is the full device since the view is smaller due to nav
if let window = UIApplication.shared.keyWindow {
blackView.alpha = 0
blackView.backgroundColor = UIColor(white: 0, alpha: 0.6)
blackView.frame = window.frame // set RECT to the same size as device
blackView.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleDismiss)))
window.addSubview(blackView)
window.addSubview(collectionView)
let height:CGFloat = CGFloat(settings.count) * cellHeight
let y = window.frame.height - height
collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height / 2)
UIView.animate(withDuration: 0.5, delay: 0, usingSpringWithDamping: 1, initialSpringVelocity: 1, options: .curveEaseOut, animations: {
self.blackView.alpha = 1
self.collectionView.frame = CGRect(x: 0, y: y, width: window.frame.width, height: window.frame.height / 2)
}, completion: nil)
}
}
#objc func handleDismiss(){
UIView.animate(withDuration: 0.5,
animations:{
self.blackView.alpha = 0
if let window = UIApplication.shared.keyWindow {
self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height / 2)
}
}, completion: {_ in
self.blackView.removeFromSuperview()
self.homeController.showSettingsController()
})
}
override init(){
super.init()
self.homeController = HomeController()
collectionView.dataSource = self
collectionView.delegate = self
collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
}
}
In the homecontroller, The menu button that you click initializes the settingsController and tells it to display:
let settingsLauncher = SettingLauncher()
#objc func handleMore(){
settingsLauncher.showSettings()
}
func showSettingsController(){
let dummyController = UIViewController()
navigationController?.pushViewController(dummyController, animated: true)
}

Answer 1

The error is telling you that you must have initialised the homeController property before you call super.init() which you don't do.
Change the code to this:
override init(){
self.homeController = HomeController()
super.init()
collectionView.dataSource = self
collectionView.delegate = self
collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
}

Answer 2

Figured it out with some help from #UpholderOfTruth and #Tj3n. Posting the working code below.
class SettingLauncher: NSObject, UICollectionViewDataSource, UICollectionViewDelegate, UICollectionViewDelegateFlowLayout {
let homeController: HomeController
...other UICollectionview functions
// on Item click insdie UIViewCollection
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
UIView.animate(withDuration: 0.5,
animations:{
self.blackView.alpha = 0
if let window = UIApplication.shared.keyWindow {
self.collectionView.frame = CGRect(x: 0, y: window.frame.height, width: window.frame.width, height: window.frame.height / 2)
}
}, completion: {_ in
let setting = self.settings[indexPath.item]
self.blackView.removeFromSuperview()
// Call function from Injected ViewController
self.homeController.showControllerSetting(setting: setting)
})
}
init(controller: HomeController){
homeController = controller
super.init()
collectionView.dataSource = self
collectionView.delegate = self
collectionView.register(SettingsCell.self, forCellWithReuseIdentifier: cellID)
}
}
Functions in my HomeController initializing the SettingsLauncher class
lazy var settingsLauncher:SettingLauncher = {
let launcher = SettingLauncher(controller: self)
return launcher
}()
#objc func handleMore(){
settingsLauncher.showSettings()
}
func showControllerSetting(setting: Setting){
let dummyController = UIViewController()
navigationController?.pushViewController(dummyController, animated: true)
}