Pfthb

So I have a base class, DataViewController<T>, which inherits from UITableViewController as follows:

class DataTableViewController<T : BMPage<BMData>> : UITableViewController, UISearchBarDelegate 
 // implementations...

I also have a TournamentsViewController which inherits from DataViewController with the generics passed in:

class TournamentsViewController: DataTableViewController<TournamentPage> 
 // overrides, etc.

For reference, here are BMPage<T>:

open class BMPage<T : Codable> : Decodable 

 public enum CodingKeys: String, CodingKey 
 case data
 

 var data : [T]

 required public init(from decoder:Decoder) throws 
 let vals = try decoder.container(keyedBy: CodingKeys.self)
 data = try vals.decode([T].self, forKey: .data)
 


extension BMPage: Encodable 
 public func encode(to encoder: Encoder) throws 
 var container = encoder.container(keyedBy: CodingKeys.self)
 try container.encode(data, forKey: .data)
 

... and BMData:

open class BMData : Codable 

 public enum CodingKeys: CodingKey 
 case id
 case name
 

 var id: Int
 var name: String

 required public init(from decoder:Decoder) throws 
 let vals = try decoder.container(keyedBy: CodingKeys.self)
 id = try vals.decode(Int.self, forKey: .id)
 name = try vals.decode(String.self, forKey: .name)
 

What I'm trying to achieve: various UITableViewController subclasses that just need to specify generics in order to specify their specific data. Here are my Tournament and TournamentPage implementations which should better explain this concept:

open class Tournament : BMData 
 let game_id: Int = 0
 let game_iteration_id: Int = 0
 let state: Int = 0
 let starts_at: String = ""
 let creator_id: Int = 0
 let stream_url: String? = nil
 let entrant_count: Int = 0
 let prereg_count: Int = 0
 let path: String = ""


open class TournamentPage : BMPage<BMData> 
 public enum CodingKeys: String, CodingKey 
 case data = "tournaments"
 

 let page: String? = nil
 let results_per_page: String = ""
 let tournament_count: Int = 0

The problem: the compiler doesn't like that I'm doing this as it's throwing multiple, yet very similar errors such as:

• Cannot convert return expression of type 'TournamentsViewController'
to return type 'UIViewController'


• Cannot convert return expression of type
'TournamentsViewController?' to return type 'UIViewController?'

Here is an example of such an expression (taken from the default ModelController that XCode threw in there, which is where all of these errors occur:

 let dataViewController = storyboard.instantiateViewController(withIdentifier: "DataViewController") as! TournamentsViewController

Is there a way to achieve what I am trying to do? I'll admit, I am new to Swift (only started learning it this week), so maybe I'm completely misunderstanding typical Swift practices and just what it was designed to do, but achieving this in a language such as C# (and probably even Objective-C, though I'm a bit rusty on it as it's been a while since I've last used it) is pretty much what I'm doing here.

Have you tried to instantiate view controller like this?
let viewController = MyTableViewController()
Than navigationController.pushViewController(viewController, animated: true)
}