When I clicked the NavigationBar in my App,it crashed.It only crashes in iOS 10 .The console log is:Assertion failure in -[UIGestureGraphEdge initWithLabel:sourceNode:targetNode:directed:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit-3599.6/Source/GestureGraph/UIGestureGraphEdge.m:25