Swift iOS EKEventStore:从EKEvent获取参加者有时会与NSInvalidArgumentException

Swift iOS EKEventStore:从EKEvent获取参加者有时会与NSInvalidArgumentException,第1张

概述我试图加载所有的日历事件通过使用块和有时(0.5%率)我得到NSInvalidArgumentException导致崩溃: var allCals = _eventStore.calendarsForEntityType(EKEntityTypeEvent)var predicate:NSPredicate! = _eventStore.predicateForEventsWithStartD 我试图加载所有的日历事件通过使用块和有时(0.5%率)我得到NSinvalidargumentexception导致崩溃:
var allCals = _eventStore.calendarsForEntityType(EKEntityTypeEvent)var predicate:nspredicate! = _eventStore.predicateForEventsWithStartDate(yearsAgo,endDate:toAgo,calendars:allCals)_eventStore.enumerateEventsMatchingPredicate(predicate,usingBlock:{            (event:EKEvent!,stop:UnsafeMutablePointer<ObjCBool>) in            if (event.Title != nil                && event.calendar != nil                && event.calendar.calendarIDentifIEr != nil                && event.lastModifIEdDate != nil                ){                        if event.attendees != nil{ // < -- SOMETIMES LEADS TO CRASH!!                            //...                        }                        else{ // standalone                             //...                        }         }   //...... })// end block

完整堆栈跟踪:[线程崩溃异常]

Thread : Fatal Exception: NSinvalidargumentexception0  CoreFoundation                 0x2917649f __exceptionPreprocess + 1261  libobjc.A.dylib                0x36970c8b objc_exception_throw + 382  CoreFoundation                 0x29096291 -[__NSSetM addobject:] + 6083  EventKit                       0x29b4eacf -[EKPersistentObject primitiveRelationValueForKey:] + 5024  Foundation                     0x29dc1617 -[NSObject(NSkeyvalueCoding) valueForKey:] + 2025  EventKit                       0x29b5afc5 -[EKObjectToManyRelation _loadedItems] + 1206  EventKit                       0x29b5aef3 -[EKObjectToManyRelation _effectiveItems] + 1027  EventKit                       0x29b5ae69 -[EKObjectToManyRelation items] + 208  EventKit                       0x29b5d179 -[EKCalendarItem attendees] + 369  MyApp                       0x000d8c78 _TTSf2n_n_n_n_n_d_i_n_n___TFFC8MyApp17WmBuildGroupsTask14doInBackgroundFS0_FT_T_U_FTGSqCSo7EKEvent_GVSs20UnsafeMutablePointerV10ObjectiveC8ObjCBool__T_ (WmBuildGroupsTask.swift:421)10 MyApp                       0x000d3f3c _TPA__TTSf2n_n_n_n_n_d_i_n_n___TFFC8MyApp17WmBuildGroupsTask14doInBackgroundFS0_FT_T_U_FTGSqCSo7EKEvent_GVSs20UnsafeMutablePointerV10ObjectiveC8ObjCBool__T_ (WmBuildGroupsTask.swift)11 MyApp                       0x000d96b8 reabstraction thunk helper from @callee_owned (@owned Swift.ImplicitlyUnwrappedOptional<ObjectiveC.EKEvent>,@uNowned Swift.UnsafeMutablePointer<ObjectiveC.ObjCBool>) -> (@uNowned ()) to @callee_uNowned @objc_block (@uNowned Swift.ImplicitlyUnwrappedOptional<ObjectiveC.EKEvent>,@uNowned Swift.UnsafeMutablePointer<ObjectiveC.ObjCBool>) -> (@uNowned ()) (WmBuildGroupsTask.swift)12 EventKit                       0x29ba72a7 __60-[EKEventStore enumerateEventsMatchingPredicate:usingBlock:]_block_invoke + 13013 EventKit                       0x29bad6af __41-[EKPredicateSearch startWithCompletion:]_block_invoke_2 + 69014 libdispatch.dylib              0x36ed07bb _dispatch_call_block_and_release + 1015 libdispatch.dylib              0x36ed9dab _dispatch_root_queue_drain + 86616 libdispatch.dylib              0x36edacd7 _dispatch_worker_thread3 + 9417 libsystem_pthread.dylib        0x37031e31 _pthread_wqthread + 66818 libsystem_pthread.dylib        0x37031b84 start_wqthread + 8
Thread : Crashed: com.apple.root.default-qos0  libsystem_kernel.dylib         0x36fb6dfc __pthread_kill + 81  libsystem_pthread.dylib        0x37034d37 pthread_kill + 622  libsystem_c.dylib              0x36f56909 abort + 763  libc++abi.dylib                0x362919c9 __cxa_bad_cast4  libc++abi.dylib                0x362ab671 default_unexpected_handler()5  libobjc.A.dylib                0x36970f25 _objc_terminate() + 1926  libc++abi.dylib                0x362a8de3 std::__terminate(voID (*)()) + 787  libc++abi.dylib                0x362a85a9 __cxxabiv1::exception_cleanup_func(_Unwind_Reason_Code,_Unwind_Exception*)8  libobjc.A.dylib                0x36970d5f objc_exception_throw + 2509  CoreFoundation                 0x29096291 -[__NSSetM addobject:] + 60810 EventKit                       0x29b4eacf -[EKPersistentObject primitiveRelationValueForKey:] + 50211 Foundation                     0x29dc1617 -[NSObject(NSkeyvalueCoding) valueForKey:] + 20212 EventKit                       0x29b5afc5 -[EKObjectToManyRelation _loadedItems] + 12013 EventKit                       0x29b5aef3 -[EKObjectToManyRelation _effectiveItems] + 10214 EventKit                       0x29b5ae69 -[EKObjectToManyRelation items] + 2015 EventKit                       0x29b5d179 -[EKCalendarItem attendees] + 3616 MyApp                       0x000d8c78 _TTSf2n_n_n_n_n_d_i_n_n___TFFC8MyApp17WmBuildGroupsTask14doInBackgroundFS0_FT_T_U_FTGSqCSo7EKEvent_GVSs20UnsafeMutablePointerV10ObjectiveC8ObjCBool__T_ (WmBuildGroupsTask.swift:421)17 MyApp                       0x000d3f3c _TPA__TTSf2n_n_n_n_n_d_i_n_n___TFFC8MyApp17WmBuildGroupsTask14doInBackgroundFS0_FT_T_U_FTGSqCSo7EKEvent_GVSs20UnsafeMutablePointerV10ObjectiveC8ObjCBool__T_ (WmBuildGroupsTask.swift)18 MyApp                       0x000d96b8 reabstraction thunk helper from @callee_owned (@owned Swift.ImplicitlyUnwrappedOptional<ObjectiveC.EKEvent>,@uNowned Swift.UnsafeMutablePointer<ObjectiveC.ObjCBool>) -> (@uNowned ()) (WmBuildGroupsTask.swift)19 EventKit                       0x29ba72a7 __60-[EKEventStore enumerateEventsMatchingPredicate:usingBlock:]_block_invoke + 13020 EventKit                       0x29bad6af __41-[EKPredicateSearch startWithCompletion:]_block_invoke_2 + 69021 libdispatch.dylib              0x36ed07bb _dispatch_call_block_and_release + 1022 libdispatch.dylib              0x36ed9dab _dispatch_root_queue_drain + 86623 libdispatch.dylib              0x36edacd7 _dispatch_worker_thread3 + 9424 libsystem_pthread.dylib        0x37031e31 _pthread_wqthread + 668

第9行a.e. WmBuildGroupsTask.swift:421如果event.attendees!= nil {

任何人都可以散布如何摆脱这场崩溃,或至少使代码安全从崩溃?

[编辑1]

我也试过:

if event.hasAttendees {  if let attArray:NSArray = event.attendees{ // crashes here    /* ... */  }

}}

有趣的是,从命令行:po event.hasAttendees返回true

当po event.attendees返回null时。但还是崩溃了

[编辑2]

升级到Swift 1.2后,得到同样的崩溃(Crashlytics)。还试过:

if event.hasAttendees {  if let attArray:[EKParticipant] = event.attendees as? [EKParticipant] // crash here {    /* ... */  }                      }

有问题的事件是指像Google这样的日历,正如我上面提到的一样,99.5%的同一事件正常工作,并且我取得了与会者的成功。

我不是iOS大师,但看起来像它的内部iOS问题:

libobjc.A.dylib                0x36970d5f objc_exception_throw + 2509  CoreFoundation                 0x29096291 -[__NSSetM addobject:] + 60810 EventKit                       0x29b4eacf -[EKPersistentObject primitiveRelationValueForKey:] + 50211 Foundation                     0x29dc1617 -[NSObject(NSkeyvalueCoding) valueForKey:] + 20212 EventKit                       0x29b5afc5 -[EKObjectToManyRelation _loadedItems] + 12013 EventKit                       0x29b5aef3 -[EKObjectToManyRelation _effectiveItems] + 10214 EventKit                       0x29b5ae69 -[EKObjectToManyRelation items] + 2015 EventKit                       0x29b5d179 -[EKCalendarItem attendees] + 36

谢谢,

很明显,这是iOS中的一个错误,所以你需要一个黑客去绕过它才能解决它。

如果是Objective C,我将使用一个try catch块来尝试捕获异常,所以应用程序不会崩溃。

Here是在Swift中使用一个try块的例子,它使用Objective C实现:

总结

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