how to inject a delegate in swift using typhoon? - ios

Question

Using typhoon I'm trying to inject the type of "worker" in my view controller. my "Worker" requires a delegate so that when the work is done, it calls this method. I need to set my view controller to be the delegate of the worker class that was injected. in other words a circular dependency.
Updated question with source:
//my typhoon assembly class
import Typhoon
class Assembly : TyphoonAssembly {
public dynamic func viewController() -> AnyObject {
return TyphoonDefinition.withClass(ViewController.self) {
(definition) in
definition.injectProperty("worker", with: self.foo())
definition.scope = TyphoonScope.Singleton
}
}
public dynamic func foo() -> AnyObject {
return TyphoonDefinition.withClass(Foo.self) {
(definition) in
definition.injectProperty("delegate", with: self.viewController())
}
}
}
Foo is where the work done, it implements WorkHandler protocol and has a delegate of type SomeProtocol to call when work has finished:
import Foundation
#objc
protocol SomeProtocol: class {
optional func hasFinishedWork(value: Bool)
}
protocol WorkHandler : class {
func doSomething()
}
class Foo: WorkHandler{
//how will this get set?
var delegate:SomeProtocol?
func doSomething(){
print("doing the work")
delegate?.hasFinishedWork!(true)
}
}
And my ViewController conforms to SomeProtocol like so:
import UIKit
class ViewController: UIViewController, SomeProtocol{
var worker:WorkHandler?
override func viewDidLoad() {
super.viewDidLoad()
worker?.doSomething();
}
#objc func hasFinishedWork(value: Bool){
print("The work was all done")
}
}
above code gives the following error when it runs:
2016-02-29 20:25:43.250 TestApp[30604:5316415] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Subclass of NSProxy or NSObject is required.'
Is anyone able to help with this?

Answer 1

Turns out i had to make my protocol to inherit from NSObject:
#objc
protocol SomeProtocol: class {
optional func hasFinishedWork(value: Bool)
}
#objc
protocol WorkHandler : class {
func doSomething()
}
class Foo: NSObject, WorkHandler{
//how will this get set?
var delegate:SomeProtocol?
#objc func doSomething(){
print("doing the work")
delegate?.hasFinishedWork!(true)
}
}
Now it works as expected.