MKReverseGeocoder导致EXC_BAD_ACCESS？

Question

我有一个应用程序,表现出间歇性崩溃.崩溃日志显示的堆栈跟踪对我来说很难破译,因此希望其他人看到这一点并指出我正确的方向.

基本上,应用程序在启动时执行反向地理编码请求,以显示用户在标签中的位置.另外,我为特定的API调用执行另一个反向地理编码请求.

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,但在此之前可能需要几分钟.

由于API调用也发出了另一个MKReverseGeocoder请求,我想也许多个并发调用存在问题？

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

因为看起来它甚至不调用我的回调方法,所以我不知道在哪里寻找这个EXC_BAD_ACCESS问题.我的代表当然仍然活跃(我正盯着发起请求的View Controller).

最后一点:它只出现在iOS 3.1.3上.我还没有看到它发生在iOS 4.0 yet.u

Answer 1

尝试使用 xcode 配置文件中的 Zombies 工具。这将帮助您找到导致 EXC_BAD_ACCESS 的对象内存。