在XMPPFrameWork ios的CoreData中保存XMPPMessage

我正在开发一个聊天应用程序并使用xmppframework。现在需要将消息存储在持久性存储器中。谁能告诉我如何在IOS中存储和检索CoreData中的消息

你在用什么

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如果是，那么默认情况下它实现核心数据，您只需做一些小的更改即可获得聊天信息

由于您使用的是github/robbiehanson/XMPPFramework，因此在初始化过程中很容易存储传入和传出消息：

//this code init your XMPPStream
xmppStream = [[XMPPStream alloc]init];
[xmppStream addDelegate:self delegateQueue:dispatch_get_main_queue()];
xmppStream.autoStartTLS = YES;

xmppReconnect = [[XMPPReconnect alloc]init];
[xmppReconnect activate:self.xmppStream];

xmppMessageArchivingCoreDataStorage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
xmppMessageArchivingModule = [[XMPPMessageArchiving alloc]initWithMessageArchivingStorage:xmppMessageArchivingCoreDataStorage];
[xmppMessageArchivingModule setClientSideMessageArchivingOnly:YES];
[xmppMessageArchivingModule activate:xmppStream];    //By this line all your messages are stored in CoreData
[xmppMessageArchivingModule addDelegate:self delegateQueue:dispatch_get_main_queue()];

要检索保存的消息，以下是我的项目中的示例代码：

NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];

NSManagedObjectContext *context = [self.xmppMessageArchivingCoreDataStorage mainThreadManagedObjectContext];
NSEntityDescription *messageEntity = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Message_CoreDataObject" inManagedObjectContext:context];

fetchRequest.entity = messageEntity;

NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"timestamp" ascending:NO];
fetchRequest.sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
NSError *error = nil;
NSArray *results = [context executeFetchRequest:fetchRequest error:&error];
//Now you get the NSArray with element type of "XMPPMessageArchiving_Message_CoreDataObject"

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是的，我正在使用这个链接。如何在数据库中存储消息。请告诉我，有XMPPMessage存档模型。。研究这个。。消息首先被存储到那个。。用户可以从这个…hi AdrianHou。。。实际上我正在-（void）xmppStream:（xmppStream*）sender direceivemessage:（XMPPMessage*）message中接收消息。。。现在开始介绍如何在XMPPMessageArchivingCoreDataStorage中保存我的消息…由于未捕获的异常“NSInvalidArgumentException”，我将终止应用程序，原因：“+entityForName:nil不是合法的NSManagedObjectContext参数，正在搜索实体名称“XMPPMessageArchiving\u Message\u CoreDataObject”请帮助调试此异常Hello@Adrian，我如何对MUC执行相同操作？Hello@AdrianHou，我正在使用您的代码，但这不起作用。您能帮助我吗？