From 96d13b663bd9717c2cc37044208799fc39e5e8b2 Mon Sep 17 00:00:00 2001
From: Pieter De Baets <pieterdb@fb.com>
Date: Fri, 28 Apr 2017 03:26:30 -0700
Subject: [PATCH] Avoid presenting on view controller that's being dismissed

Summary:
Mitigates the issue in https://github.com/facebook/react-native/issues/10471, by not trying to present
a modal or alert view if the presenting view controller is already being dismissed.

Reviewed By: shergin

Differential Revision: D4962169

fbshipit-source-id: 593e3f21096458651d16677a3e030552f809bf02
---
 React/Base/RCTUtils.m | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/React/Base/RCTUtils.m b/React/Base/RCTUtils.m
index c00bb283d..ab49299d3 100644
--- a/React/Base/RCTUtils.m
+++ b/React/Base/RCTUtils.m
@@ -481,9 +481,10 @@ UIViewController *__nullable RCTPresentedViewController(void)
   }
 
   UIViewController *controller = RCTKeyWindow().rootViewController;
-
-  while (controller.presentedViewController) {
-    controller = controller.presentedViewController;
+  UIViewController *presentedController = controller.presentedViewController;
+  while (presentedController && ![presentedController isBeingDismissed]) {
+    controller = presentedController;
+    presentedController = controller.presentedViewController;
   }
 
   return controller;