例外情况是：异常类型：EXC_BAD_ACCESS代码：KERN_INVALID_ADDRESS位于0x3250974659

崩溃发生在名为com.apple.NSURLConnectionLoader的线程中
在调用时 – [NSBlockOperation main]

这是该线程的堆栈跟踪：

0    libobjc.A.dylib     objc_msgSend + 9
1    Foundation      -[NSBlockOperation main] + 200
2    Foundation  -[__NSOperationInternal start] + 840
3    Foundation  -[_NSCFURLProtocolBridgeWithTrampoline processEventQ] + 344
4    Foundation  -[_NSCFURLProtocolBridgeWithTrampoline pushEvent:from:] + 298
5    Foundation  -[_NSCFURLProtocolBridge stop] + 88
6    Foundation  _bridger + 64
7    CFNetwork   __block_global_7 + 24
8    CFNetwork   __block_global_8 + 12
9    CFNetwork   ___performAsync_block_invoke_068 + 18
10   CoreFoundation  CFArrayApplyFunction + 176
11   CFNetwork   RunloopBlockContext::perform() + 74
12   CFNetwork   MultiplexerSource::perform() + 188
13   CoreFoundation  __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14
14   CoreFoundation  __CFRunLoopDoSources0 + 212
15   CoreFoundation  __CFRunLoopRun + 646
16   CoreFoundation  CFRunLoopRunSpecific + 356
17   CoreFoundation  CFRunLoopRunInMode + 104
18   Foundation  +[NSURLConnection(Loader) _resourceLoadLoop:] + 308
19   Foundation  __NSThread__main__ + 972
20   libsystem_c.dylib   _pthread_start + 308

非常感谢任何帮助,以了解可能导致这种崩溃的原因.