Merge pull request #133 from renanwillamy/hotfix_rotation

keep the sideMenu open on rotation

Author: kukushi

Sources/SideMenu/Preferences.swift

@@ -123,6 +123,9 @@ extension SideMenuController {
 
             /// The sensitivity of the pan gesture recognizer revealing menu view controller.
             public var panGestureSensitivity: CGFloat = 0.25
+
+            /// If the side menu should keep open on rotation. Default is false.
+            public var shouldKeepMenuOpen: Bool = false
         }
 
         /// The basic configuration of side menu.

Sources/SideMenu/SideMenuController.swift

@@ -711,6 +711,32 @@ open class SideMenuController: UIViewController {
         }
     }
 
+    private func updateSideMenuWidth() {
+        let fifteenPercent = 0.15
+        let size = UIScreen.main.bounds.size
+        SideMenuController.preferences.basic.menuWidth = size.width - (size.width * CGFloat(fifteenPercent))
+    }
+
+    private func keepSideMenuOpenOnRotation() {
+        if menuViewController != nil {
+            if self.isMenuRevealed {
+                self.hideMenu(animated: false, completion: nil)
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
+                    self.updateSideMenuWidth()
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
+                        self.revealMenu(animated: false, completion: nil)
+                    })
+                })
+            } else {
+                self.revealMenu(animated: false) { _ in
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.1, execute: {
+                        self.hideMenu(animated: false, completion: nil)
+                    })
+                }
+            }
+        }
+    }
+
     // MARK: Orientation
 
     open override var shouldAutorotate: Bool {
@@ -728,16 +754,20 @@ open class SideMenuController: UIViewController {
     }
 
     open override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
-        hideMenu(animated: false, completion: { _ in
-            // Temporally hide the menu container view for smooth animation
-            self.menuContainerView.isHidden = true
-            coordinator.animate(alongsideTransition: { _ in
-                self.contentContainerView.frame = self.contentFrame(visibility: self.isMenuRevealed, targetSize: size)
-            }, completion: { (_) in
-                self.menuContainerView.isHidden = false
-                self.menuContainerView.frame = self.sideMenuFrame(visibility: self.isMenuRevealed, targetSize: size)
+        if preferences.basic.shouldKeepMenuOpen {
+            self.keepSideMenuOpenOnRotation()
+        } else {
+            hideMenu(animated: false, completion: { _ in
+                // Temporally hide the menu container view for smooth animation
+                self.menuContainerView.isHidden = true
+                coordinator.animate(alongsideTransition: { _ in
+                    self.contentContainerView.frame = self.contentFrame(visibility: self.isMenuRevealed, targetSize: size)
+                }, completion: { (_) in
+                    self.menuContainerView.isHidden = false
+                    self.menuContainerView.frame = self.sideMenuFrame(visibility: self.isMenuRevealed, targetSize: size)
+                })
             })
-        })
+        }
 
         super.viewWillTransition(to: size, with: coordinator)
     }