Avoid nudging transitions if a gesture is in progress #2

Following the same steps from #1548 and #1912 for GLFW and iOS ports.
Also removed a redundant check if transform state is changing since
we're already dealing with that.

1 files changed, 6 insertions, 0 deletions

diff --git a/platform/ios/MGLMapView.mm b/platform/ios/MGLMapView.mm
index f4dea9baeb..0cce29ba1d 100644
--- a/platform/ios/MGLMapView.mm
+++ b/platform/ios/MGLMapView.mm
@@ -707,6 +707,12 @@ std::chrono::steady_clock::duration secondsAsDuration(float duration)
 
         [self updateUserLocationAnnotationView];
 
+        // don't nudge transitions if in the midst of a gesture.
+        if (self.pan.state       == UIGestureRecognizerStateChanged ||
+            self.pinch.state     == UIGestureRecognizerStateChanged ||
+            self.rotate.state    == UIGestureRecognizerStateChanged ||
+            self.quickZoom.state == UIGestureRecognizerStateChanged) return;
+
         _mbglMap->nudgeTransitions(needsRerender);
     }
 }