Bec*_*hsh 7 xcode objective-c overlays mapkit ios
我正在添加大约1000 MKPolygon秒MKMapView.将叠加层添加到MKMapView其上后,它可以正常工作.但是,如果我快速放大并缩小(偶尔放开缩放以便mapView进程是新的visibleMapRect),我发现应用程序(有时)会崩溃并出现以下异常堆栈跟踪:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSSetM removeObject:]: object cannot be nil'
*** First throw call stack:
(
0 CoreFoundation 0x0000000107db6b0b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010781b141 objc_exception_throw + 48
2 CoreFoundation 0x0000000107d1712a -[__NSSetM removeObject:] + 538
3 VectorKit 0x000000010bae84fa -[VKRasterOverlayTileSource removeOverlay:] + 89
4 VectorKit 0x000000010b79a648 -[VKMapModel removeRasterOverlay:] + 68
5 MapKit 0x0000000106f93bf1 -[MKOverlayContainerView _removeDrawable:forOverlay:level:] + 502
6 MapKit 0x0000000106f92633 -[MKOverlayContainerView addAndRemoveOverlayViews] + 785
7 MapKit 0x0000000106f44772 -[MKMapView _didChangeRegionMidstream:] + 229
8 MapKit 0x0000000106f49528 -[MKMapView mapLayer:didChangeRegionAnimated:] + 91
9 VectorKit 0x000000010b7d39e8 -[VKMapCameraController rotateToYaw:withPoint:animated:] + 884
10 VectorKit 0x000000010b7d4e7b -[VKMapCameraController snapMapIfNecessary:] + 389
11 MapKit 0x0000000106f93bf1 -[MKOverlayContainerView _removeDrawable:forOverlay:level:] + 502
12 MapKit 0x0000000106f92633 -[MKOverlayContainerView addAndRemoveOverlayViews] + 785
13 MapKit 0x0000000106f44772 -[MKMapView _didChangeRegionMidstream:] + 229
14 MapKit 0x0000000106f49528 -[MKMapView mapLayer:didChangeRegionAnimated:] + 91
15 VectorKit 0x000000010b9f7b0e -[VKScreenCameraController stopPinchingWithFocusPoint:] + 64
16 MapKit 0x0000000106fbb1e3 __38-[MKMapGestureController handlePinch:]_block_invoke.184 + 126
17 VectorKit 0x000000010b78aaa2 -[VKAnimation stopAnimation:] + 109
18 VectorKit 0x000000010b8f9a3d -[VKDynamicAnimation stopAnimation:] + 45
19 MapKit 0x0000000106fb7819 -[MKMapGestureController stopDynamicAnimations] + 50
20 MapKit 0x0000000106fba254 -[MKMapGestureController gestureRecognizerTouchesBegan:] + 39
21 MapKit 0x0000000106fbbab1 -[_MKUserInteractionGestureRecognizer touchesBegan:withEvent:] + 198
22 UIKit 0x0000000108e9b934 -[UIGestureRecognizer _touchesBegan:withEvent:] + 113
23 UIKit 0x0000000108e8901c __55-[UIGestureEnvironment _updateGesturesForEvent:window:]_block_invoke + 337
24 UIKit 0x0000000108e89b79 -[UIGestureEnvironment _deliverEvent:toGestureRecognizers:usingBlock:] + 282
25 UIKit 0x0000000108e88e0a -[UIGestureEnvironment _updateGesturesForEvent:window:] + 274
26 UIKit 0x00000001089d4eea -[UIWindow sendEvent:] + 4092
27 UIKit 0x0000000108981a84 -[UIApplication sendEvent:] + 352
28 UIKit 0x00000001091655d4 __dispatchPreprocessedEventFromEventQueue + 2926
29 UIKit 0x000000010915d532 __handleEventQueue + 1122
30 UIKit 0x000000010915e800 __handleEventQueue + 5936
31 CoreFoundation 0x0000000107d5cc01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
32 CoreFoundation 0x0000000107d420cf __CFRunLoopDoSources0 + 527
33 CoreFoundation 0x0000000107d415ff __CFRunLoopRun + 911
34 CoreFoundation 0x0000000107d41016 CFRunLoopRunSpecific + 406
35 GraphicsServices 0x000000010cc97a24 GSEventRunModal + 62
36 UIKit 0x0000000108964134 UIApplicationMain + 159
37 MyProject 0x0000000106e51a9f main + 111
38 libdyld.dylib 0x000000010e56165d start + 1
这并不总是发生.通常它很少见.您可以看到很难调试并解决出现问题的原因,因为我的项目没有出现在堆栈跟踪中(除了它在我的应用程序中运行...).
在尝试追踪问题的时候,我创建了一个非常基本的应用程序,只有MKMapView1000个随机MKPolygons,CLLocationCoordinate2D每个随机生成5个.我发现该应用程序在缩放,休息,缩放,休息等时仍然会崩溃.但不太可能？所有我在这里做的是将基本随机MKPolygon年代到MKMapView!注意除了给它一个随机的MKPolygonRenderer每个MKPolygon什么都没做fillColor.
注意:我在iPhone 7 Simulator上运行Xcode中的应用程序.
这里出了什么问题？谢谢!
在向地图视图添加和删除注释时，我遇到了非常类似的问题。
答案是将所有访问注释的东西——甚至是只读取注释数组的计算——放到主线程上。
我只将实际的添加和删除放在主线程上，大部分情况下都可以，但会随机崩溃
[__NSSetM removeObject:]: 对象不能为 nil
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