问题
I'm not sure how to use the XMPPFramework's core data to store incoming messages. Does anyone have any tutorials on how to do this? I see User objects, which in turn can have many "resources". Is each message received supposed to be a new resource that I create and persist?
I do not know what part is my responsibility and what part the framework provides regarding message history. I can intercept every incoming message. Then am I supposed to create and store each message inside a Messages table using core data? I'd have a Message Entity. And each XMPPUser would have an array of Message objects. But then wouldn't I be rolling my own solution, which would be working against the framework?
Thanks!
回答1:
I know this is an old thread but as I am currently working with XMPP on iOS I must say that there is a built in support for archiving messages in XMPP.
I downloaded the XMPP framework for iOS and in it there is folder marked XEP-0136. Import the folders in XCode and activate client side archiving by using the following lines of code in the class you instantiate XMPP client:
xmppMessageArchivingStorage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
xmppMessageArchivingModule = [[XMPPMessageArchiving alloc] initWithMessageArchivingStorage:xmppMessageArchivingStorage];
the following one line of code saves you from sending archive specific stanzas to the xmpp server which will most probably respond with service-not-implemented
[xmppMessageArchivingModule setClientSideMessageArchivingOnly:YES];
[xmppMessageArchivingModule activate:xmppStream];
[xmppMessageArchivingModule addDelegate:self delegateQueue:dispatch_get_main_queue()];
And you are set. From that moment on, messages (outgoing and incoming) will be stored in a table created by the framework.
If you need more info please comment and i will get back to you.
@PraviJay
I did like this :
-(void)testMessageArchiving{
XMPPMessageArchivingCoreDataStorage *storage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
NSManagedObjectContext *moc = [storage mainThreadManagedObjectContext];
NSEntityDescription *entityDescription = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Message_CoreDataObject"
inManagedObjectContext:moc];
NSFetchRequest *request = [[NSFetchRequest alloc]init];
[request setEntity:entityDescription];
NSError *error;
NSArray *messages = [moc executeFetchRequest:request error:&error];
[self print:[[NSMutableArray alloc]initWithArray:messages]];
}
-(void)print:(NSMutableArray*)messages{
@autoreleasepool {
for (XMPPMessageArchiving_Message_CoreDataObject *message in messages) {
NSLog(@"messageStr param is %@",message.messageStr);
NSXMLElement *element = [[NSXMLElement alloc] initWithXMLString:message.messageStr error:nil];
NSLog(@"to param is %@",[element attributeStringValueForName:@"to"]);
NSLog(@"NSCore object id param is %@",message.objectID);
NSLog(@"bareJid param is %@",message.bareJid);
NSLog(@"bareJidStr param is %@",message.bareJidStr);
NSLog(@"body param is %@",message.body);
NSLog(@"timestamp param is %@",message.timestamp);
NSLog(@"outgoing param is %d",[message.outgoing intValue]);
}
}
}
Hope it helps :)
回答2:
The responses that indicate XMPP Framework doesn't save the history are incorrect.
To integrate results in a table view use:
XMPPMessageArchivingCoreDataStorage *storage = [XMPPMessageArchivingCoreDataStorage sharedInstance];
NSManagedObjectContext *moc = [storage mainThreadManagedObjectContext];
NSEntityDescription *entityDescription = [NSEntityDescription entityForName:@"XMPPMessageArchiving_Contact_CoreDataObject"
inManagedObjectContext:moc];
NSFetchRequest *request = [[NSFetchRequest alloc]init];
[request setEntity:entityDescription];
_contactsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request managedObjectContext:moc sectionNameKeyPath:nil cacheName:@"MessagesContactListCache"];
NSError *error;
BOOL rval = [_contactsController performFetch:&error];
回答3:
an example to get archived messages in Swift 4
declares and initializes the variables XMPPMessageArchivingCoreDataStorage where I initialize the XMPPStream
var xmppMessageStorage: XMPPMessageArchivingCoreDataStorage?
var xmppMessageArchiving: XMPPMessageArchiving?
xmppMessageStorage = XMPPMessageArchivingCoreDataStorage.sharedInstance()
xmppMessageArchiving = XMPPMessageArchiving(messageArchivingStorage: xmppMessageStorage)
xmppMessageArchiving?.clientSideMessageArchivingOnly = true
xmppMessageArchiving?.activate(stream)
xmppMessageArchiving?.addDelegate(self, delegateQueue: DispatchQueue.main)
doing this, whenever a message arrives, this will cause it to be archived without needing to do anything else.
then, to retrieve the archived message
func RecibedMessageArchiving(idFriend: String) {
let JabberIDFriend = idFriend //id friend chat, example test1@example.com
let moc = xmppMessageStorage?.mainThreadManagedObjectContext
let entityDescription = NSEntityDescription.entity(forEntityName: "XMPPMessageArchiving_Message_CoreDataObject", in: moc!)
let request = NSFetchRequest<NSFetchRequestResult>()
let predicateFormat = "bareJidStr like %@ "
let predicate = NSPredicate(format: predicateFormat, JabberIDFriend)
request.predicate = predicate
request.entity = entityDescription
//jabberID id del usuario, cliente
var jabberIDCliente = ""
if let jabberj = globalChat.value(forKey: "jabberID"){
jabberIDCliente = jabberj as! String
}
do {
let results = try moc?.fetch(request)
for message: XMPPMessageArchiving_Message_CoreDataObject? in results as? [XMPPMessageArchiving_Message_CoreDataObject?] ?? [] {
var element: DDXMLElement!
do {
element = try DDXMLElement(xmlString: (message as AnyObject).messageStr)
} catch _ {
element = nil
}
let body: String
let sender: String
let date: NSDate
let isIncomings: Bool
if message?.body != nil {
body = (message?.body)!
} else {
body = ""
}
if element.attributeStringValue(forName: "to") == JabberIDFriend {
sender = jabberIDCliente
isIncomings = false
} else {
sender = "test2@example.com"
isIncomings = true
}
var m: [AnyHashable : Any] = [:]
m["msg"] = message?.body
print("body", message?.body)
print("test", element.attributeStringValue(forName: "to"))
print("test2", element.attributeStringValue(forName: "body"))
}
} catch _ {
//catch fetch error here
}
}
回答4:
XMPPFramework does not store message history,So i suggest to you it is better to use core data.Create a table by taking sender,receiver,message,time as columns .Insert record when send message method calling and receive message method calling...
-(void)saveChatHistory:(NSString *)sender:(NSString*)receiver:(NSString*)message:(NSString*)time
{
NSManagedObjectContext *context=[[self appDelegate] managedObjectContext];
NSManagedObject *newContext=[NSEntityDescription insertNewObjectForEntityForName:@"ChatHistory" inManagedObjectContext:context];
[newContext setValue:sender forKey:@"sender"];
[newContext setValue:receiver forKey:@"receiver"];
[newContext setValue:message forKey:@"message"];
[newContext setValue:time forKey:@"time"];
NSError *error;
if(![context save:&error])
{
UIAlertView *alertView=[[UIAlertView alloc] initWithTitle:@"Error Occured" message:@"Data is not Stored in Database Try Again" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil];
[alertView show];
}
}
Retrive chat history when specific user selected from tableview.... the fallowing method shows how to retrive chat history...and call this method from didSelectRowAtIndexPath method and pass destination id as parameter
-(void)getChatHistory:(NSString*)jidString1
{
NSManagedObjectContext *context=[[self appDelegate] managedObjectContext];
NSEntityDescription *entity=[NSEntityDescription entityForName:@"ChatHistory" inManagedObjectContext:context];
NSFetchRequest *req=[[NSFetchRequest alloc] init];
NSPredicate *predicate=[NSPredicate predicateWithFormat:@"receiver=%@",jidString1];
[req setEntity:entity];
[req setPredicate:predicate];
NSManagedObject *matchRecords=nil;
NSError *error;
NSArray *objects=[context executeFetchRequest:req error:&error];
if([objects count]==0)
{
UIAlertView *alertView=[[UIAlertView alloc] initWithTitle:@"No Record found" message:@"there is no previous chat history" delegate:self cancelButtonTitle:@"ok" otherButtonTitles:nil];
[alertView show];
}
else
{
for(int i=0;i<[objects count];i++)
{
matchRecords=[objects objectAtIndex:i ];
NSLog(@"sender is %@",[matchRecords valueForKey:@"sender"]);
NSLog(@"reciver is %@",[matchRecords valueForKey:@"receiver"]);
NSLog(@"messages is %@",[matchRecords valueForKey:@"message"]);
NSLog(@"time is %@",[matchRecords valueForKey:@"time"]);
}
}
}
I hope this is useful to you
来源：https://stackoverflow.com/questions/8568910/storing-messages-using-xmppframework-for-ios