RetroObjective

Proxy for receive delegate events more practically

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About RetroObjective

RetroObjective enable you to receive delegate events by subscribed handler.

This is swift 5 and later generic version of DelegateProxy by DelegateProxy

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Requirements

• Swift 5 / Xcode 9
• OS X 10.12 or later
• iOS 10.0 or later
• watchOS 3.0 or later
• tvOS 10.0 or later

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Installation

CocoaPods

Add the following to your Podfile:

use_frameworks!

target 'YOUR_TARGET_NAME' do
  pod 'RetroObjective', :git => 'https://github.com/amine2233/RetroObjective.git'
end

$ pod install

Carthage

Add the following to your Cartfile:

github "amine2233/RetroObjective"

$ carthage update

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Basic Example

Create RetroObjective inherited class.

final class ScrollViewDelegateProxy: RetroObjective, UIScrollViewDelegate, RetroObjectiveType {
    func resetDelegateProxy(owner: UIScrollView) {
        owner.delegate = self
    }
}

It can be useful to implements extension.

extension UIScrollView {
    var delegateProxy: ScrollViewDelegateProxy {
        return .proxy(for: self)
    }
}

You can receive delegate events as following.

scrollView.delegateProxy
    .receive(#selector(UIScrollViewDelegate.scrollViewDidScroll(_:))) { args in
        guard let scrollView: UIScrollView = args.value(at: 0) else { return }
        print(scrollView.contentOffset)
}

Basic Example with Combine

You can add a new publisher on UIScrollView

extension UISCrollView {
    var value: AnyPublisher<UISCrollView, Never> {
        Publishers.proxyDelegate(delegateProxy, selector: #selector(UIScrollViewDelegate.scrollViewDidScroll(_:)))
            .compactMap { $0.value(at: 0) as? UISCrollView }
            .eraseToAnyPublisher()
    }
}

Contribution

Welcome to fork and submit pull requests!!

Before submitting pull request, please ensure you have passed the included tests. If your pull request including new function, please write test cases for it.

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License

DelegateProxy is released under the MIT License.