如何在聊天usig xmpp框架中发送图像 [英] How to send image in chat usig xmpp framework

问题描述

我正在基于聊天功能制作一个应用程序，可以发送聊天消息，但是如果我在聊天消息中添加图片附件，则该附件无法正常工作。这是我的消息代码

Hi I am making an app based on the chatting I can send chat messages, but if i add image attachment to the chat message, its not working.here is my message code

if (![[messageStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length] && imgURL==nil) {
      return;
}
NSString *MyString;
NSDate *now = [NSDate date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"HH:mm,yyyy/MM/dd"];
MyString = [dateFormatter stringFromDate:now];
NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
NSString *myJID=[defaults valueForKey:@"userNameJID"];

    if ([imgURL length]==0) {
       chatMessageToSendAndPutInDB=[messageStr mutableCopy];
       chatMessageToSendAndPutInDB=[[chatMessageToSendAndPutInDB stringByReplacingOccurrencesOfString:@"'" withString:@""] mutableCopy];
    }else
    {

       receivedDataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
          chatMessageToSendAndPutInDB=[receivedDataString mutableCopy];
        chatMessageToSendAndPutInDB=[[chatMessageToSendAndPutInDB stringByReplacingOccurrencesOfString:@"'" withString:@""] mutableCopy];

    }
    [DBObject open];
[DBObject insertInTable:@"chatTable" withUserId:myJID withFriendID:[[ASNGlobalClass shareManager] chatToUserJID] withMessage:chatMessageToSendAndPutInDB withTimeDate:MyString withLeftOrRight:0];

 NSXMLElement *body = [NSXMLElement elementWithName:@"body"];
[DBObject closeDatabase];
[self fetchDataFromDatabase];
   if([messageStr length] > 0 ) {

  [body setStringValue:messageStr];
   }else if ([imgURL length]>0){
             [body setStringValue:receivedDataString];
   }    NSXMLElement *message = [NSXMLElement elementWithName:@"message"];
[message addAttributeWithName:@"type" stringValue:@"chat"];

[message addAttributeWithName:@"to" stringValue:chatWithUser];
 NSXMLElement *chatStatus=[NSXMLElement elementWithName:@"composing" xmlns:UIApplicationStateActive];
[message addChild:chatStatus];
[message addChild:body];
[[[self appDelegate] xmppStream] sendElement:message];

我正在使用xmpp框架和openfire服务器。而且我不知道如何发送图像。请帮助我，我正在使用sqlite来存储和获取
。谢谢。

I am using xmpp framework and openfire server. and i don't know how to send images.please help me and i am using sqlite for storing and fetching Thanks in advance.

推荐答案

attachment元素用于在XMPP中发送图像。
您可以使用以下功能：

attachment element is used to send image in XMPP. you can use following function:

-(void)sendMessage:(NSString *)strText img:(UIImage *)SendImage{
NSXMLElement *body = [NSXMLElement elementWithName:@"body"];
[body setStringValue:strText];

NSXMLElement *message = [NSXMLElement elementWithName:@"message"];
[message addAttributeWithName:@"type" stringValue:@"chat"];
[message addAttributeWithName:@"to" stringValue:userId];
[message addChild:body];

if (SendImage) {
    NSData *dataF = UIImagePNGRepresentation(SendImage);
    NSString *imgStr=[dataF base64EncodedStringWithOptions:0];

    NSXMLElement *ImgAttachement = [NSXMLElement elementWithName:@"attachement"];
    [ImgAttachement setStringValue:imgStr];
    [message addChild:ImgAttachement];
}

[self.xmppStream sendElement:message];
[self.view endEditing:YES];}

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