From d28311d3cb0c59fd5afcc5a306b67dd4e9c3ed18 Mon Sep 17 00:00:00 2001
From: Abdullah Selek <abdullahselek@gmail.com>
Date: Thu, 15 Feb 2018 22:26:38 +0000
Subject: [PATCH] Swipe and dismiss feature.

---
 SwiftyNotifications/SwiftyNotifications.swift | 44 +++++++++++++++++++
 .../SwiftyNotificationsTests.swift            |  5 +++
 2 files changed, 49 insertions(+)

diff --git a/SwiftyNotifications/SwiftyNotifications.swift b/SwiftyNotifications/SwiftyNotifications.swift
index 21f05ed..bd09be3 100644
--- a/SwiftyNotifications/SwiftyNotifications.swift
+++ b/SwiftyNotifications/SwiftyNotifications.swift
@@ -248,6 +248,12 @@ open class SwiftyNotifications: UIView {
         let tapHandler = UITapGestureRecognizer(target: self, action: #selector(SwiftyNotifications.handleTap))
         addGestureRecognizer(tapHandler)
     }
+    
+    open func addSwipeGestureRecognizer(direction: UISwipeGestureRecognizerDirection) {
+        let swipeGestureRecognizer = UISwipeGestureRecognizer(target: self, action: #selector(dismissView(gesture:)))
+        swipeGestureRecognizer.direction = direction
+        self.addGestureRecognizer(swipeGestureRecognizer)
+    }
 
     open override func didMoveToSuperview() {
         super.didMoveToSuperview()
@@ -376,6 +382,44 @@ open class SwiftyNotifications: UIView {
     @objc internal func handleTap() {
         touchHandler?()
     }
+    
+    @objc func dismissView(gesture: UISwipeGestureRecognizer) {
+        guard let window = UIApplication.shared.keyWindow, let view = gesture.view else {
+            return
+        }
+        var frame: CGRect!
+        switch gesture.direction {
+        case .right:
+            frame = CGRect(x: view.frame.width,
+                           y: view.frame.origin.y,
+                           width: view.frame.width,
+                           height: view.frame.height)
+            break
+        case .left:
+            frame = CGRect(x: -view.frame.width,
+                           y: view.frame.origin.y,
+                           width: view.frame.width,
+                           height: view.frame.height)
+            break
+        case .up:
+            frame = CGRect(x: 0.0,
+                           y:-view.frame.height,
+                           width: view.frame.width,
+                           height: view.frame.height)
+            break
+        case .down:
+            frame = CGRect(x: 0.0,
+                           y: window.frame.height + view.frame.height,
+                           width: view.frame.width,
+                           height: view.frame.height)
+            break
+        default:
+            break
+        }
+        UIView.animate(withDuration: 0.4) {
+            view.frame = frame
+        }
+    }
 
     internal func canDisplay() -> Bool {
         return self.superview != nil ? true : false
diff --git a/SwiftyNotificationsTests/SwiftyNotificationsTests.swift b/SwiftyNotificationsTests/SwiftyNotificationsTests.swift
index 1911769..b6b5962 100644
--- a/SwiftyNotificationsTests/SwiftyNotificationsTests.swift
+++ b/SwiftyNotificationsTests/SwiftyNotificationsTests.swift
@@ -240,6 +240,11 @@ class SwiftyNotificationsTests: XCTestCase {
         let gesturesCount = swiftNotifications.gestureRecognizers?.count
         XCTAssertEqual(gesturesCount, 1)
     }
+    
+    func testAddSwipeGestureRecognizer() {
+        swiftNotifications.addSwipeGestureRecognizer(direction: .left)
+        XCTAssertEqual(swiftNotifications.gestureRecognizers?.count, 1)
+    }
 
     func testAddWidthConstraint() {
         let viewController = UIViewController()