我有一个应用程序出现间歇性崩溃。崩溃日志显示的堆栈跟踪对我来说很难破译,所以希望其他人已经看到了这一点,并能指出我正确的方向。
基本上,该应用程序在启动时会执行反向地理编码请求,以在标签中显示用户的位置。此外,我对特定 API 调用执行另一个反向地理编码请求。
正在发生的事情是,有时这个 MKReverseGeocoder 需要很长时间才能回来。最终我假设我会收到一个失败的回调,有时我会这样做,但这可能需要几分钟才能发生。
由于 API 调用还发出另一个 MKReverseGeocoder 请求,我认为可能存在多个并发调用的问题?
这是我的堆栈跟踪:
Program received signal: “EXC_BAD_ACCESS”.
(gdb) backtrace
#0 0x30c237a0 in -[MKPlacemark _mapkit_cache_heapTime] ()
#1 0x30bffe60 in compareTimes ()
#2 0x32403b24 in CFBinaryHeapAddValue ()
#3 0x30c0030c in -[MKCache setObject:forKey:] ()
#4 0x30c2aa48 in -[MKReverseGeocodeCache addPlacemark:forCoordinate:] ()
#5 0x30c2251c in -[MKReverseGeocoder requester:didReceiveResponse:forRequest:] ()
#6 0x3388cc1c in -[PBRequester _tryParseData] ()
#7 0x3388b288 in -[PBRequester connection:didReceiveData:] ()
#8 0x337490ce in -[NSURLConnection(NSURLConnectionReallyInternal) sendDidReceiveData:originalLength:] ()
#9 0x33748ff0 in _NSURLConnectionDidReceiveData ()
#10 0x30899ff8 in URLConnectionClient::_clientDidReceiveData ()
#11 0x3088ca3e in URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload ()
#12 0x3088cb40 in URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload ()
#13 0x3088cb40 in URLConnectionClient::ClientConnectionEventQueue::processAllEventsAndConsumePayload ()
#14 0x3088c8ce in URLConnectionClient::processEvents ()
#15 0x3088c878 in URLConnection::multiplexerClientPerform ()
#16 0x3088c7f8 in MultiplexerSource::perform ()
#17 0x3088c798 in MultiplexerSource::_perform ()
#18 0x323f4f48 in CFRunLoopRunSpecific ()
#19 0x323f4c1e in CFRunLoopRunInMode ()
#20 0x335051c8 in GSEventRunModal ()
#21 0x324a6c30 in -[UIApplication _run] ()
#22 0x324a5230 in UIApplicationMain ()
#23 0x000024f8 in main (argc=1, argv=0x2ffff504) at /Users/ben/projects/ABC/iphone/ABC/main.m:14
因为它看起来甚至没有调用我的回调方法,所以我不知道在哪里寻找这个 EXC_BAD_ACCESS 问题。我的委托肯定仍然处于活动状态(我正盯着发起请求的视图控制器)。
1 最后一点:到目前为止,它只出现在 iOS 3.1.3 上。我还没有看到 iOS 4.0 发生这种情况。u