From da5ab811b673d96441a2d5e44bf9a5a65299a0fc Mon Sep 17 00:00:00 2001
From: Jordan Kiley <jmkiley@users.noreply.github.com>
Date: Tue, 6 Nov 2018 15:54:08 -0800
Subject: [iOS] Move creation of attributed string to global queue (#13298)

---
 platform/darwin/src/MGLAttributionInfo.mm | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/platform/darwin/src/MGLAttributionInfo.mm b/platform/darwin/src/MGLAttributionInfo.mm
index 07d10e852b..5fa121f5f8 100644
--- a/platform/darwin/src/MGLAttributionInfo.mm
+++ b/platform/darwin/src/MGLAttributionInfo.mm
@@ -65,10 +65,16 @@
     NSData *htmlData = [styledHTML dataUsingEncoding:NSUTF8StringEncoding];
 
 #if TARGET_OS_IPHONE
-    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithData:htmlData
-                                                                                          options:options
-                                                                               documentAttributes:nil
-                                                                                            error:NULL];
+
+    __block NSMutableAttributedString *attributedString;
+    
+    dispatch_sync(dispatch_get_main_queue() , ^{
+        // This initializer should be called from a global or main queue. https://developer.apple.com/documentation/foundation/nsattributedstring/1524613-initwithdata
+        attributedString = [[NSMutableAttributedString alloc] initWithData:htmlData
+                                                                   options:options
+                                                        documentAttributes:nil
+                                                                     error:NULL];
+    });
 #else
     NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithHTML:htmlData
                                                                                           options:options
-- 
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