通过Segue将数据传递到另一个推入导航堆栈的情节提要中的UITabBarController

Question

我正在尝试将一些数据推送到另一个情节提要中的2018-10-09 12:01:42,715 WARN [CommitterEvent Processor #2] org.apache.hadoop.tools.mapred.CopyCommitter: Unable to cleanup temp files org.apache.hadoop.net.ConnectTimeoutException: Call From ip-YY.YY.YY.YY.ec2.internal/YY.YY.YY.YY to ec2-xx.xx.xx.xx.ap-south-1.compute.amazonaws.com:20000 failed on socket timeout exception: org.apache.hadoop.net.ConnectTimeoutException: 20000 millis timeout while waiting for channel to be ready for connect. ch : java.nio.channels.SocketChannel[connection-pending remote=ec2-xx.xx.xx.xx.ap-south-1.compute.amazonaws.com/xx.xx.xx.xx:20000]; For more details see: http://wiki.apache.org/hadoop/SocketTimeout at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791) at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:750) at org.apache.hadoop.ipc.Client.call(Client.java:1508) at org.apache.hadoop.ipc.Client.call(Client.java:1441) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:230) at com.sun.proxy.$Proxy10.getListing(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getListing(ClientNamenodeProtocolTranslatorPB.java:573) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:256) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:104) at com.sun.proxy.$Proxy11.getListing(Unknown Source) at org.apache.hadoop.hdfs.DFSClient.listPaths(DFSClient.java:2101) at org.apache.hadoop.hdfs.DFSClient.listPaths(DFSClient.java:2084) at org.apache.hadoop.hdfs.DistributedFileSystem.listStatusInternal(DistributedFileSystem.java:731) at org.apache.hadoop.hdfs.DistributedFileSystem.access$600(DistributedFileSystem.java:110) at org.apache.hadoop.hdfs.DistributedFileSystem$16.doCall(DistributedFileSystem.java:796) at org.apache.hadoop.hdfs.DistributedFileSystem$16.doCall(DistributedFileSystem.java:792) at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81) at org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:792) at org.apache.hadoop.fs.Globber.listStatus(Globber.java:76) at org.apache.hadoop.fs.Globber.doGlob(Globber.java:237) at org.apache.hadoop.fs.Globber.glob(Globber.java:151) at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1714) at org.apache.hadoop.tools.mapred.CopyCommitter.deleteAttemptTempFiles(CopyCommitter.java:145) at org.apache.hadoop.tools.mapred.CopyCommitter.cleanupTempFiles(CopyCommitter.java:131) at org.apache.hadoop.tools.mapred.CopyCommitter.abortJob(CopyCommitter.java:118) at org.apache.hadoop.mapreduce.v2.app.commit.CommitterEventHandler$EventProcessor.handleJobAbort(CommitterEventHandler.java:298) at org.apache.hadoop.mapreduce.v2.app.commit.CommitterEventHandler$EventProcessor.run(CommitterEventHandler.java:240) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.hadoop.net.ConnectTimeoutException: 20000 millis timeout while waiting for channel to be ready for connect. ch : java.nio.channels.SocketChannel[connection-pending remote=ec2-xx.xx.xx.xx.ap-south-1.compute.amazonaws.com/xx.xx.xx.xx:20000] at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:533) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494) at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:648) at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:744) at org.apache.hadoop.ipc.Client$Connection.access$3000(Client.java:396) at org.apache.hadoop.ipc.Client.getConnection(Client.java:1557) at org.apache.hadoop.ipc.Client.call(Client.java:1480) ... 31 more 2018-10-09 12:01:42,716 INFO [CommitterEvent Processor #2] org.apache.hadoop.tools.mapred.CopyCommitter: Cleaning up temporary work folder: /user/hdfs/.staging/_distcp1087004350 上，但是我无法正确设置顺序。

我有ViewController，其中包含项目列表，选择一行后，我想将密钥传递给UITableView，该密钥位于嵌入在具有以下内容的ViewController中的另一个Storyboard上：被推入导航堆栈。

我可以没有问题地来回转换，问题是将数据转移到视图控制器。

我的主故事板上的表格视图代码

UITabBarContoller

我已切换override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { performSegue(withIdentifier: "segue_details", sender: self) } override func prepare(for segue: UIStoryboardSegue, sender: Any?) { print("Pepare for segue: \(String(describing: segue.identifier))") if let barViewControllers = segue.destination as? UITabBarController , let nav = barViewControllers.viewControllers?[0] as? UINavigationController, let destinationVC = nav.topViewController as? DetailsTabViewController { let vehicle = tableData[tableView.indexPathForSelectedRow!.row] as! JSON //THIS NEVER FIRES print("\n\n\n\n\n\nPrepare call key: \(vehicle["CallKey"])\n\n\n\n\n") destinationVC.callKey = vehicle["CallKey"].stringValue } } 的barViewControllers和导航控制器以尝试获取正确的View控制器，但是我似乎无法使其正常工作。

以下是主情节提要的if let

的屏幕截图

DetailsTabViewController 代码

UITableView

及其匹配的情节提要

Answer 1

实际上，它并不像我想的那么复杂。搜索目的地是DetailsTabViewController。只是强制转换为该类型，而不是UITabBarController（因为我的自定义类已经为element类型）。

UITabBarController