From 6f86bee283d803581e8901977b825d5c0cd3a9cd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Minh=20Nguye=CC=82=CC=83n?= <mxn@1ec5.org>
Date: Mon, 14 Mar 2016 12:08:21 -0700
Subject: [ios] Only set preferred action on iOS 9+

Fixed a crash on iOS 8 when presenting the Add Offline Pack dialog.

Fixes #4305.
---
 platform/ios/app/MBXOfflinePacksTableViewController.m | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/platform/ios/app/MBXOfflinePacksTableViewController.m b/platform/ios/app/MBXOfflinePacksTableViewController.m
index 3410f075a1..fb9d5fb3ed 100644
--- a/platform/ios/app/MBXOfflinePacksTableViewController.m
+++ b/platform/ios/app/MBXOfflinePacksTableViewController.m
@@ -100,7 +100,9 @@ static NSString * const MBXOfflinePacksTableViewActiveCellReuseIdentifier = @"Ac
         }];
     }];
     [alertController addAction:downloadAction];
-    alertController.preferredAction = downloadAction;
+    if ([alertController respondsToSelector:@selector(setPreferredAction:)]) {
+        alertController.preferredAction = downloadAction;
+    }
     
     [self presentViewController:alertController animated:YES completion:nil];
 }
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