[ios] Require two fingers for duration of tilt gesture

mapbox · Jun 20, 2019 · b98dbd2 · b98dbd2
1 parent 6aa065c
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diff --git a/platform/ios/CHANGELOG.md b/platform/ios/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 Mapbox welcomes participation and contributions from everyone. Please read [CONTRIBUTING.md](../../CONTRIBUTING.md) to get started.
 
+## 5.2.0
+
+* Fixed an issue where the two-finger tilt gesture would continue after lifting one finger. ([#14969](https://github.com/mapbox/mapbox-gl-native/pull/14969))
+
 ## 5.1.0 - June 19, 2019
 
 ### Styles and rendering

diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
@@ -2062,6 +2062,12 @@ - (void)handleTwoFingerDragGesture:(UIPanGestureRecognizer *)twoFingerDrag
 
     if (twoFingerDrag.state == UIGestureRecognizerStateBegan || twoFingerDrag.state == UIGestureRecognizerStateChanged)
     {
+        if (twoFingerDrag.numberOfTouches != 2)
+        {
+            twoFingerDrag.state = UIGestureRecognizerStateEnded;
+            return;
+        }
+
         CGFloat gestureDistance = CGPoint([twoFingerDrag translationInView:twoFingerDrag.view]).y;
         CGFloat slowdown = 2.0;