我正在构建交互式旋转光盘控件。当用户拖动视图时，我将旋转变换应用于视图。像这样：
circleView.layer.transform = CATransform3DMakeRotation(angle, 0, 0, 1)
由于某种原因，此行代码导致应用崩溃。崩溃不是在该行的第一击发生，而是在 连续旋转几秒钟。如果我将这一行注释掉，则不会发生崩溃。
更糟糕的是，当应用崩溃时，xcode不会显示任何错误或堆栈跟踪信息，但会显示“与设备的连接丢失”。
这仅在设备上发生。在模拟器上一切正常。
在设备的崩溃日志中，崩溃时我没有看到我的应用程序崩溃，但是进程DTServiceHub崩溃了
Incident Identifier: 02336F7A-CAB3-4B13-9509-65EA61813529
CrashReporter Key: e16756d8ab2514bab0584705f4151434dbed594f
Hardware Model: iPad3,4
Process: DTServiceHub [768]
Path: /Developer/Library/PrivateFrameworks/DVTInstrumentsFoundation.framework/DTServiceHub
Identifier: DTServiceHub
Version: ???
Code Type: ARM (Native)
Role: Unspecified
Parent Process: launchd [1]
Coalition: <none> [352]
Date/Time: 2018-10-02 18:26:03.0352 +0300
Launch Time: 2018-10-02 18:25:45.0000 +0300
OS Version: iPhone OS 10.3.3 (14G60)
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0bd5f30c
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [0]
hread 6 name: Dispatch queue: NStatManager queue
Thread 6 Crashed:
0 libobjc.A.dylib 0x1d404dc6 objc_msgSend + 6
1 CoreFoundation 0x1e086210 -[__NSDictionaryM objectForKey:] + 128
2 IDEDebugGaugeDataProviders 0x00439278 0x430000 + 37496
3 IDEDebugGaugeDataProviders 0x004382a8 0x430000 + 33448
4 NetworkStatistics 0x240ab374 -[NWStatisticsDelegateBlockWrapper sourceDidReceiveCounts:] + 160
5 NetworkStatistics 0x240a548c __59-[NWStatisticsManager dispatchDidReceiveCounts:fromUpdate:]_block_invoke + 110
6 libdispatch.dylib 0x1d83d796 _dispatch_call_block_and_release + 10
7 libdispatch.dylib 0x1d84a59c _dispatch_queue_serial_drain + 854
8 libdispatch.dylib 0x1d840b70 _dispatch_queue_invoke + 886
9 libdispatch.dylib 0x1d84c1b4 _dispatch_root_queue_drain + 326
10 libdispatch.dylib 0x1d84c00e _dispatch_worker_thread3 + 106
11 libsystem_pthread.dylib 0x1d9f287c _pthread_wqthread + 1040
12 libsystem_pthread.dylib 0x1d9f245c start_wqthread + 8
有什么想法吗？