From 1a91d899bea1ef7d4bdb0ff74dc9efaa4760bf56 Mon Sep 17 00:00:00 2001
From: Dominic Go <dominic@dominicgo.dev>
Date: Wed, 2 Oct 2024 19:00:00 +0800
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9E=20Fix:=20`ModalSheetPresentationSt?=
 =?UTF-8?q?ateMachine`?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../ModalSheetPresentationStateMachine.swift  | 23 +++++++++++--------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/ios/Temp/ModalSheetPresentationStateMachine.swift b/ios/Temp/ModalSheetPresentationStateMachine.swift
index 83610b8d..08875edc 100644
--- a/ios/Temp/ModalSheetPresentationStateMachine.swift
+++ b/ios/Temp/ModalSheetPresentationStateMachine.swift
@@ -243,6 +243,10 @@ extension ModalSheetPresentationStateMachine: ViewControllerLifecycleNotifiable
     sender: UIViewController,
     isAnimated: Bool
   ) {
+    guard !self.isSheetPanGestureActive else {
+      return;
+    };
+    
     self.setState(nextState: .dismissing);
   };
   
@@ -266,17 +270,12 @@ extension ModalSheetPresentationStateMachine: ModalSheetViewControllerEventsNoti
     self.setState(nextState: .presentingViaGestureCancelled);
   };
   
-  public func notifyOnSheetDidDismissViaGesture(
-    sender: UIViewController,
-    presentationController: UIPresentationController
-  ) {
-    self.setState(nextState: .dismissedViaGesture);
-  };
-  
   public func notifyOnSheetWillDismissViaGesture(
     sender: UIViewController,
     presentationController: UIPresentationController
   ) {
+    self.isSheetPanGestureActive = true;
+    
     guard let transitionCoordinator = sender.transitionCoordinator else {
       return;
     };
@@ -295,6 +294,13 @@ extension ModalSheetPresentationStateMachine: ModalSheetViewControllerEventsNoti
     };
   };
   
+  public func notifyOnSheetDidDismissViaGesture(
+    sender: UIViewController,
+    presentationController: UIPresentationController
+  ) {
+    self.setState(nextState: .dismissedViaGesture);
+  };
+  
   public func notifyOnSheetBeingDraggedByPanGesture(
     sender: UIViewController,
     panGesture: UIPanGestureRecognizer
@@ -306,6 +312,7 @@ extension ModalSheetPresentationStateMachine: ModalSheetViewControllerEventsNoti
     switch panGesture.state {
       case .began, .changed:
         self.isSheetPanGestureActive = true;
+        self.setState(nextState: .draggingViaGesture);
       
       case .ended, .cancelled, .failed:
         self.isSheetPanGestureActive = false;
@@ -313,7 +320,5 @@ extension ModalSheetPresentationStateMachine: ModalSheetViewControllerEventsNoti
       default:
         break;
     };
-  
-    self.setState(nextState: .draggingViaGesture);
   };
 };