我正在OSX上开发一个Qt应用程序，它扫描并连接到蓝牙低功耗设备。由于在Qt中缺少必要的API来访问广告中的制造商特定数据，我必须连接到扫描期间发现的每个设备，以检查它是否是我正在寻找的设备类型。我现在的问题是，当连接到某些设备时，我可以成功获取有关制造商和序列号的信息;但是当连接到其他设备时，应用程序就会崩溃。
调用QLowEnergyController的方法connectToDevice()时发生崩溃。以下是跟踪：
2015-10-21 11:33:19.875 MyApp[24076:1272507] -[OS_dispatch_mach performNextRequest]: unrecognized selector sent to instance 0x7fe6cb7bbc40
2015-10-21 11:33:19.941 MyApp[24076:1272507] An uncaught exception was raised
2015-10-21 11:33:19.941 MyApp[24076:1272507] -[OS_dispatch_mach performNextRequest]: unrecognized selector sent to instance 0x7fe6cb7bbc40
2015-10-21 11:33:19.941 MyApp[24076:1272507] (
0 CoreFoundation 0x00007fff8afc3bd2 __exceptionPreprocess + 178
1 libobjc.A.dylib 0x00007fff986c2dd4 objc_exception_throw + 48
2 CoreFoundation 0x00007fff8b02d0ed -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00007fff8af343d1 ___forwarding___ + 1009
4 CoreFoundation 0x00007fff8af33f58 _CF_forwarding_prep_0 + 120
5 QtBluetooth 0x0000000104d23588 -[OSXBTCentralManager peripheral:didUpdateValueForCharacteristic:error:] + 760
6 CoreBluetooth 0x00007fff9356d9ee -[CBCentralManager xpcConnection:didReceiveMsg:args:] + 149
7 CoreBluetooth 0x00007fff935777de __34-[CBXpcConnection handleMsg:args:]_block_invoke + 77
8 libdispatch.dylib 0x00007fff887498ff _dispatch_call_block_and_release + 12
9 libdispatch.dylib 0x00007fff8873e453 _dispatch_client_callout + 8
10 libdispatch.dylib 0x00007fff88751c1c _dispatch_main_queue_callback_4CF + 1685
11 CoreFoundation 0x00007fff8af79789 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
12 CoreFoundation 0x00007fff8af3873d __CFRunLoopRun + 1949
13 CoreFoundation 0x00007fff8af37d38 CFRunLoopRunSpecific + 296
14 HIToolbox 0x00007fff947e9d55 RunCurrentEventLoopInMode + 235
15 HIToolbox 0x00007fff947e9b8f ReceiveNextEventCommon + 432
16 HIToolbox 0x00007fff947e99cf _BlockUntilNextEventMatchingListInModeWithFilter + 71
17 AppKit 0x00007fff8b72df3a _DPSNextEvent + 1067
18 AppKit 0x00007fff8b72d369 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
19 AppKit 0x00007fff8b721ecc -[NSApplication run] + 682
20 libqcocoa.dylib 0x000000010508408d _ZN21QCocoaEventDispatcher13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE + 2189
21 QtCore 0x00000001042c107d _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE + 381
22 QtCore 0x00000001042c3f5a _ZN16QCoreApplication4execEv + 346
23 MyApp 0x00000001034bdf3f main + 2319
24 MyApp 0x00000001034bd1e4 start + 52
)
2015-10-21 11:33:19.967 MyApp[24076:1272507] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[OS_dispatch_mach performNextRequest]: unrecognized selector sent to instance 0x7fe6cb7bbc40'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff8afc3bd2 __exceptionPreprocess + 178
1 libobjc.A.dylib 0x00007fff986c2dd4 objc_exception_throw + 48
2 CoreFoundation 0x00007fff8b02d0ed -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00007fff8af343d1 ___forwarding___ + 1009
4 CoreFoundation 0x00007fff8af33f58 _CF_forwarding_prep_0 + 120
5 QtBluetooth 0x0000000104d23588 -[OSXBTCentralManager peripheral:didUpdateValueForCharacteristic:error:] + 760
6 CoreBluetooth 0x00007fff9356d9ee -[CBCentralManager xpcConnection:didReceiveMsg:args:] + 149
7 CoreBluetooth 0x00007fff935777de __34-[CBXpcConnection handleMsg:args:]_block_invoke + 77
8 libdispatch.dylib 0x00007fff887498ff _dispatch_call_block_and_release + 12
9 libdispatch.dylib 0x00007fff8873e453 _dispatch_client_callout + 8
10 libdispatch.dylib 0x00007fff88751c1c _dispatch_main_queue_callback_4CF + 1685
11 CoreFoundation 0x00007fff8af79789 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
12 CoreFoundation 0x00007fff8af3873d __CFRunLoopRun + 1949
13 CoreFoundation 0x00007fff8af37d38 CFRunLoopRunSpecific + 296
14 HIToolbox 0x00007fff947e9d55 RunCurrentEventLoopInMode + 235
15 HIToolbox 0x00007fff947e9b8f ReceiveNextEventCommon + 432
16 HIToolbox 0x00007fff947e99cf _BlockUntilNextEventMatchingListInModeWithFilter + 71
17 AppKit 0x00007fff8b72df3a _DPSNextEvent + 1067
18 AppKit 0x00007fff8b72d369 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
19 AppKit 0x00007fff8b721ecc -[NSApplication run] + 682
20 libqcocoa.dylib 0x000000010508408d _ZN21QCocoaEventDispatcher13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE + 2189
21 QtCore 0x00000001042c107d _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE + 381
22 QtCore 0x00000001042c3f5a _ZN16QCoreApplication4execEv + 346
23 MyApp 0x00000001034bdf3f main + 2319
24 MyApp 0x00000001034bd1e4 start + 52
)
libc++abi.dylib: terminating with uncaught exception of type NSException
The program has unexpectedly finished.
我有几个问题要问：
哪种BT设备或设置拒绝/过滤传入连接？当使用LightBlue连接到那些BLE设备时，它会说“外围设备在被询问时断开连接”，但LightBlue不会崩溃。
我们可以将Qt的Bluetooth DiscoveryAgent设置为仅扫描低能耗设备吗？没有在文件中看到它但仍想问。
由于崩溃似乎发生在Qt库中，我如何捕获该异常并忽略该设备？我做了以下不起作用。
try { m_controller->connectToDevice(); }
catch(...) { //Log("UNKNOWN EXCEPTION"); }
如果有人能提供有关此问题或上述问题的信息，我将不胜感激。问题可能是具体的，但问题的答案可以帮助我或其他人。感谢。