Question

我正在编写一个使用NSOutputStream的应用。我这样初始化连接：

delegate = self;
CFReadStreamRef readStream;
CFWriteStreamRef writeStream;

CFStreamCreatePairWithSocketToHost(NULL, (__bridge CFStringRef)url,port, &readStream, &writeStream);
CFReadStreamSetProperty(readStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);
CFWriteStreamSetProperty(writeStream, kCFStreamPropertyShouldCloseNativeSocket, kCFBooleanTrue);

inputStream = (__bridge_transfer NSInputStream *)readStream;
outputStream = (__bridge_transfer NSOutputStream *)writeStream;

[inputStream setDelegate:delegate];
[outputStream setDelegate:delegate];

loop = [NSRunLoop currentRunLoop];
[inputStream scheduleInRunLoop:loop forMode:NSDefaultRunLoopMode];
[outputStream scheduleInRunLoop:loop forMode:NSDefaultRunLoopMode];

[inputStream setProperty:NSStreamSocketSecurityLevelTLSv1 forKey:NSStreamSocketSecurityLevelKey];
[outputStream setProperty:NSStreamSocketSecurityLevelTLSv1 forKey:NSStreamSocketSecurityLevelKey];



[inputStream setProperty:NSStreamSocketSecurityLevelNegotiatedSSL
                  forKey:NSStreamSocketSecurityLevelKey];
[outputStream setProperty:NSStreamSocketSecurityLevelNegotiatedSSL
                   forKey:NSStreamSocketSecurityLevelKey];

NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys:
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredCertificates,
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsAnyRoot,
                          [NSNumber numberWithBool:NO], kCFStreamSSLValidatesCertificateChain,
                          kCFNull,kCFStreamSSLPeerName,
                          nil];

CFReadStreamSetProperty((CFReadStreamRef)inputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);
CFWriteStreamSetProperty((CFWriteStreamRef)outputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);

[outputStream open];
[inputStream open];

[self sendVersionOrWait];
[loop run];

然后做一些动作取决于NSStreamDelegate方法。闭合连接通过以下方式完成：

 [inputStream close];
[outputStream close];
[inputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[outputStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
[inputStream setDelegate:nil];
[outputStream setDelegate:nil];

inputStream = nil;
outputStream = nil;

有时（随机）我收到EXC_BREAKPOINT并且应用程序崩溃了。这是崩溃日志的一部分：

异常类型：EXC_BREAKPOINT（SIGTRAP）例外代码：0x0000000000000001,0x000000000000defe 由线程触发：5

线程5名称：Dispatch queue：com.apple.root.default-qos

线程5崩溃：

0 CoreFoundation 0x22767e22 CFHash + 130

1 CoreFoundation 0x22768d70 CFBasicHashGetCountOfKey + 1152

2 CoreFoundation 0x227688aa CFSetContainsValue + 98

3 CoreFoundation 0x2279ca5a CFRunLoopRemoveSource + 226

4 CFNetwork 0x22343eca SocketStream :: write（__ CFWriteStream *，unsigned char const *，long，CFStreamError *）+ 426

5 CFNetwork 0x223480c2 WriteStreamCallbacks :: _ write（__ CFWriteStream *，unsigned char const *，long，CFStreamError *，void *）+ 34

6 CoreFoundation 0x2278d7ec CFWriteStreamWrite + 356

7 App 0x000a0190 - [AppMenuViewController sendVersion]（AppMenuViewController.m：763）

8 App 0x000a0c68 - [AppMenuViewController sendVersionOrWait]（AppMenuViewController.m：832）

9基金会0x235655e4 __NSFireDelayedPerform + 464

10 CoreFoundation 0x22828734 CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION + 12

11 CoreFoundation 0x228282b4 __CFRunLoopDoTimer + 652

12 CoreFoundation 0x2282651e __CFRunLoopRun + 1414

13 CoreFoundation 0x22773dac CFRunLoopRunSpecific + 472

14 CoreFoundation 0x22773bbe CFRunLoopRunInMode + 102

15 Foundation 0x234ab16c - [NSRunLoop（NSRunLoop）runMode：beforeDate：] + 260

16基金会0x234f95e0 - [NSRunLoop（NSRunLoop）运行] + 76

17 App 0x0009feaa - [AppMenuViewController initConnection：withPort：]（AppMenuViewController.m：749）

18 App 0x000a1642 - [AppMenuViewController stream：handleEvent：]（AppMenuViewController.m：952）

19 CoreFoundation 0x227d9b94 _signalEventSync + 144

20 CoreFoundation 0x227e3ef2 _cfstream_solo_signalEventSync + 198

21 CoreFoundation 0x227d981e _CFStreamSignalEvent + 322

22 CFNetwork 0x222b7bd4 SocketStream :: dispatchSignalFromSocketCallbackUnlocked（SocketStreamSignalHolder *）+ 36

23 CFNetwork 0x222b78be SocketStream :: socketCallback（__ CFSocket *，unsigned long，__ CFData const *，void const *）+ 146

24 CFNetwork 0x222b77f2 SocketStream :: _ SocketCallBack_stream（__ CFSocket *，unsigned long，__ CFData const *，void const *，void *）+ 54

25 CoreFoundation 0x2282b0bc __CFSocketPerformV0 + 552

26 CoreFoundation 0x22828804 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 12

27 CoreFoundation 0x22827c16 __CFRunLoopDoSources0 + 218

28 CoreFoundation 0x22826294 __CFRunLoopRun + 764

29 CoreFoundation 0x22773dac CFRunLoopRunSpecific + 472

30 CoreFoundation 0x22773bbe CFRunLoopRunInMode + 102

31基金会0x234ab16c - [NSRunLoop（NSRunLoop）runMode：beforeDate：] + 260

32基金会0x234f95e0 - [NSRunLoop（NSRunLoop）运行] + 76

33 App 0x0009feaa - [AppMenuViewController initConnection：withPort：]（AppMenuViewController.m：749）

34 App 0x0009b664 __58- [AppMenuViewController alertView：clickedButtonAtIndex：] _ block_invoke（AppMenuViewController.m：385）

35 libdispatch.dylib 0x30521610 _dispatch_call_block_and_release + 8

36 libdispatch.dylib 0x3052d350 _dispatch_root_queue_drain + 816

37 libdispatch.dylib 0x3052e27a _dispatch_worker_thread3 + 102

38 libsystem_pthread.dylib 0x3069ee22 _pthread_wqthread + 666

39 libsystem_pthread.dylib 0x3069eb74 start_wqthread + 4

我认为它可能是由网络问题引起的，因为它出现在我的WIFI路由器没有互联网连接时。但我不确定，我也不知道如何删除此错误。请帮忙:)

Answer 1

我的猜测是这与线程有关。尝试对主线程进行调度，以确保在主线程上完成所有操作，并查看是否能够神奇地解决问题。如果是这样，你知道在哪里看......

EXC_BREAKPOINT随机使用NSOutputStream

1 个答案: