Fix a bug may cause infinite loop. (#3073)

* Fix a bug may cause infinite loop. * Update BarLineChartViewBase.swift put nil check first seems better
ChartsOrg · Dec 9, 2017 · 6fee51c · 6fee51c
1 parent 2ff5cb5
commit 6fee51c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Source/Charts/Charts/BarLineChartViewBase.swift b/Source/Charts/Charts/BarLineChartViewBase.swift
@@ -927,7 +927,7 @@ open class BarLineChartViewBase: ChartViewBase, BarLineScatterCandleBubbleChartD
             gestureRecognizer == _panGestureRecognizer
         {
             var scrollView = self.superview
-            while !(scrollView is NSUIScrollView)
+            while scrollView != nil && !(scrollView is NSUIScrollView)
             {
                 scrollView = scrollView?.superview
             }