Rx Wrapping 예제 (methodInvoked)

UIViewController+Rx.swift

import RxSwift
import RxCocoa

extension Reactive where Base: UIViewController {
    var viewWillAppear: ControlEvent<Void> {
        let source = methodInvoked(#selector(Base.viewWillAppear)).map { _ in }
        return ControlEvent(events: source)
    }
    var viewDidAppear: ControlEvent<Void> {
        let source = methodInvoked(#selector(Base.viewDidAppear)).map { _ in }
        return ControlEvent(events: source)
    }
    var viewWillDisappear: ControlEvent<Void> {
        let source = methodInvoked(#selector(Base.viewWillDisappear)).map { _ in }
        return ControlEvent(events: source)
    }
    var viewDidDisappear: ControlEvent<Void> {
        let source = methodInvoked(#selector(Base.viewDidDisappear)).map { _ in }
        return ControlEvent(events: source)
    }
}