From 77f43ff06272c64276304ef8f305f2954b945d76 Mon Sep 17 00:00:00 2001
From: Julian Rex <julian.rex@mapbox.com>
Date: Tue, 16 Apr 2019 13:02:14 -0400
Subject: [ios] Ensure display link is created at launch.

---
 platform/ios/src/MGLMapView.mm | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index 6fc859511a..bcf3bc7ed6 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -1714,11 +1714,19 @@ public:
 
     // Only restart the display link if we're not hidden
 //    self.displayLink.paused = ![self displayLinkShouldRun];
-    MGLAssert(self.displayLink, @"");
-    
-    if ([self mapViewIsVisible])
+    if (self.displayLink)
+    {
+        if ([self mapViewIsVisible])
+        {
+            [self startDisplayLink];
+        }
+    }
+    else
     {
-        [self startDisplayLink];
+        // This is required since at the start of the application, didMoveToWindow
+        // can be called when still in an inactive state. In this case, we haven't
+        // had an opportunity to create the display link, so create it here.
+        [self validateDisplayLink];
     }
 }
 
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