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我的应用程序因上述错误而崩溃。我检查了 swift 文件和故事板之间的所有连接，似乎没有任何问题。此外，调试器似乎没有打印错误消息。这就是它给我的：

2016-06-19 16:49:33.549062 Food[20053:3251540] [LogFacilityCK] Operation 8A5BA319FDEBBCBA finished
2016-06-19 16:49:33.549097 Food[20053:3251542] [] nw_endpoint_handler_cancel [1 api.parse.com:443 ready resolver (satisfied)]
2016-06-19 16:49:33.549975 Food[20053:3251542] [] nw_endpoint_handler_cancel [1.1 52.72.144.232:443 ready socket-flow (satisfied)]
2016-06-19 16:49:33.550439 Food[20053:3251540] [LogFacilityOP] Finished operation <CKQueryOperation: 0x7f8a64ea80d0; operationID=8A5BA319FDEBBCBA,  stateFlags=finished, metrics=<CKOperationMetrics: 0x7f8a64ea61b0; cloudKitMetrics=<CKMetric: 0x7f8a64ea77b0; startDate=2016-06-19 08:49:03 +0000, duration=0.413, queueing=0.073, executing=1.108, bytesUploaded=369, bytesDownloaded=436, connections=1, connectionsCreated=0>>, requestIDs=(F13449B5-44D2-418F-8E68-8142C07DD8DB)>
2016-06-19 16:49:33.550856 Food[20053:3251542] [] __nw_socket_service_writes_block_invoke sendmsg(fd 9, 31 bytes): socket has been closed
libc++abi.dylib: terminating with uncaught exception of type NSException

崩溃时突出显示的行可以在下面的链接中找到（截取整个屏幕的屏幕截图以防万一，我不确定这是否有用）：

http://imgur.com/C0goM9q

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当您抛出异常并且没有人捕获异常时，就会发生这种情况。Objective C 和 C++ 异常使用相同的异常机制。尝试设置异常断点以在抛出异常时捕获它们。这将向您显示谁抛出了未被捕获的异常。在此处输入图像描述

于 2016-06-21T00:47:42.937 回答