From efcebed18253e0c003ecdf0eea053618b18b5464 Mon Sep 17 00:00:00 2001
From: nickcheng <nickcheng@users.noreply.github.com>
Date: Wed, 20 Jan 2021 16:23:01 +0900
Subject: [PATCH] Fixed the crash when ownerVC is nil.

---
 Sources/Core.swift | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Sources/Core.swift b/Sources/Core.swift
index f277117b..6b76e020 100644
--- a/Sources/Core.swift
+++ b/Sources/Core.swift
@@ -847,7 +847,8 @@ class Core: NSObject, UIGestureRecognizerDelegate {
                 ownerVC.notifyDidMove()
         },
             completion: { [weak self] in
-                guard let self = self else { return }
+                guard let self = self,
+                      self.ownerVC != nil else { return }
                 self.layoutAdapter.activateLayout(for: targetPosition, forceLayout: true)
                 completion()
         })