Cannot receive event with custom DelegateProxy and Protocol - ios

Question

I try to migrate delegate of DifficultyViewDelegate to observable. This is my DifficultyViewDelegate :
#objc protocol DifficultyViewDelegate: class {
func levelDidIncrease()
func levelDidDecrease()
}
And my DifficultyView :
weak var delegate: DifficultyViewDelegate?
#IBAction func decreaseLevel(_ sender: Any) {
delegate?.levelDidDecrease()
}
#IBAction func increaseLevel(_ sender: Any) {
delegate?.levelDidIncrease()
}
And this is my RxDifficultyViewDelegateProxy
class RxDifficultyViewDelegateProxy: DelegateProxy, DelegateProxyType {
static func currentDelegateFor(_ object: AnyObject) -> AnyObject? {
let difficultyView: DifficultyView = object as! DifficultyView
return difficultyView.delegate
}
static func setCurrentDelegate(_ delegate: AnyObject?, toObject object: AnyObject) {
let difficultyView: DifficultyView = object as! DifficultyView
difficultyView.delegate = delegate as? DifficultyViewDelegate
}
}
I also added an extension on my DifficultyView :
extension DifficultyView {
public var rx_delegate: RxDifficultyViewDelegateProxy {
return RxDifficultyViewDelegateProxy.proxyForObject(RxDifficultyViewDelegateProxy.self)
}
public var rx_levelDidIncrease: Observable<Void> {
return rx_delegate.methodInvoked(#selector(DifficultyViewDelegate.levelDidIncrease)).map { _ in return }
}
}
But it seems that when I do :
difficultyView.rx_levelDidIncrease.asObservable().subscribe(onNext: {
print("did increase")
}).addDisposableTo(disposeBag)
It's never called. Someone has any pointers ?

Answer 1

Try use PublishSubject:
DifficultyView:
class DifficultyView: UIView {
var levelDidIncrease = PublishSubject<Void>()
var levelDidDecrease = PublishSubject<Void>()
#IBAction func decreaseLevel(_ sender: Any) {
levelDidDecrease.onNext()
}
#IBAction func increaseLevel(_ sender: Any) {
levelDidIncrease.onNext()
}
}
And then:
var difficultyView = DifficultyView()
difficultyView.levelDidDecrease.asObservable()
.subscribe(onNext: {
print("did decrease")
})
.addDisposableTo(disposeBag)
difficultyView.decreaseLevel(theSender) // <- THIS line performs the side effect