From 4e1ae2e9b915e6b608a42017cc3adb25c7bedede Mon Sep 17 00:00:00 2001
From: Liam DeBeasi <liamdebeasi@users.noreply.github.com>
Date: Wed, 10 Apr 2019 08:24:05 -0400
Subject: [PATCH] fix(): add undefined and iOS checks when running iOS 12.2
 scrolling patches (#1008)

* add undef check

* whitespace
---
 src/navigation/nav-controller-base.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/navigation/nav-controller-base.ts b/src/navigation/nav-controller-base.ts
index 1e65cfe77..86b7753c6 100644
--- a/src/navigation/nav-controller-base.ts
+++ b/src/navigation/nav-controller-base.ts
@@ -770,8 +770,13 @@ export class NavControllerBase extends Ion implements NavController {
        * be re-enabled unless there
        * is some kind of CSS reflow triggered
        */
-      if (enteringView.getIONContentRef()) {
-        const platform = this.plt;
+      const platform = this.plt;
+      if (
+        enteringView &&
+        enteringView.getIONContentRef &&
+        enteringView.getIONContentRef() &&
+        platform.is('ios')
+      ) {
         platform.timeout(() => {
           platform.raf(() => {
             const content = enteringView.getIONContentRef().nativeElement;