feat: GesturePublisher 생성

iOS/Projects/Shared/CombineCocoa/Sources/GestureSubscription.swift

@@ -0,0 +1,38 @@
+//
+//  GestureSubscription.swift
+//  CombineCocoa
+//
+//  Created by MaraMincho on 1/11/24.
+//  Copyright © 2024 kr.codesquad.boostcamp8. All rights reserved.
+//
+
+import Combine
+import UIKit
+
+final class GestureSubscription<T: Subscriber>: Subscription where T.Input == UIGestureRecognizer, T.Failure == Never {
+  var subscriber: T?
+  let gesture: UIGestureRecognizer
+  var targetView: UIView?
+
+  @objc func action() {
+    _ = subscriber?.receive(gesture)
+  }
+
+  init(subscriber: T, gesture: UIGestureRecognizer, targetView: UIView) {
+    self.subscriber = subscriber
+    self.gesture = gesture
+    self.targetView = targetView
+
+    gesture.addTarget(self, action: #selector(action))
+    targetView.addGestureRecognizer(gesture)
+  }
+
+  func request(_: Subscribers.Demand) {}
+
+  func cancel() {
+    gesture.removeTarget(self, action: #selector(action))
+    targetView?.removeGestureRecognizer(gesture)
+    targetView = nil
+    subscriber = nil
+  }
+}

iOS/Projects/Shared/CombineCocoa/Sources/UIView+Publisher.swift

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+//
+//  UIView+Publisher.swift
+//  CombineCocoa
+//
+//  Created by MaraMincho on 1/11/24.
+//  Copyright © 2024 kr.codesquad.boostcamp8. All rights reserved.
+//
+
+import Combine
+import UIKit
+
+public extension UIView {
+  func publisher(gesture: GestureType) -> GesturePublisher {
+    return GesturePublisher(targetView: self, gesture: gesture.recognizer)
+  }
+
+  struct GesturePublisher: Publisher {
+    public typealias Output = UIGestureRecognizer
+    public typealias Failure = Never
+
+    let targetView: UIView
+    let gesture: UIGestureRecognizer
+    init(targetView: UIView, gesture: UIGestureRecognizer) {
+      self.targetView = targetView
+      self.gesture = gesture
+    }
+
+    public func receive<S>(subscriber: S) where S: Subscriber, Never == S.Failure, UIGestureRecognizer == S.Input {
+      let subscription = GestureSubscription(subscriber: subscriber, gesture: gesture, targetView: targetView)
+      subscriber.receive(subscription: subscription)
+    }
+  }
+
+  enum GestureType {
+    case tap
+    case swipe
+    case longPress
+    case pan
+    case pinch
+    case edge
+
+    var recognizer: UIGestureRecognizer {
+      switch self {
+      case .tap:
+        return UITapGestureRecognizer()
+      case .swipe:
+        return UISwipeGestureRecognizer()
+      case .longPress:
+        return UILongPressGestureRecognizer()
+      case .pan:
+        return UIPanGestureRecognizer()
+      case .pinch:
+        return UIPinchGestureRecognizer()
+      case .edge:
+        return UIPinchGestureRecognizer()
+      }
+    }
+  }
+}