如何使用Objective C的

Question

在這裏，我已經把它貼的代碼下降XMPP羣聊接收邀請：

NSXMLElement *imessage = [NSXMLElement elementWithName:@"message"]; 
[imessage addAttributeWithName:@"from" stringValue:[[xmppStream myJID]full]]; 
[imessage addAttributeWithName:@"to" stringValue:roomName]; 

NSXMLElement *xelem = [NSXMLElement elementWithName:@"x" xmlns:XMPPMUCUserNamespace]; 

NSXMLElement *decline = [NSXMLElement elementWithName:@"decline"]; 
[decline addAttributeWithName:@"to" stringValue:roomName]; 
NSXMLElement *reason = [NSXMLElement elementWithName:@"reason"]; 
[reason setStringValue:@"Sorry Dear, I can not join right now."]; 
[decline addChild:reason]; 

[xelem addChild:decline]; 

[imessage addChild:xelem]; 

任何一個可以解決[請告訴我我的錯誤。

Answer 1

最後我找到答案了我的問題：

這裏是我的代碼：

NSXMLElement *decline = [NSXMLElement elementWithName:@"decline"]; 
    [decline addAttributeWithName:@"to" stringValue:@"Sender JID"]; 
    if (reason) 
    { 
     [decline addChild:reason]; 
    } 

    NSXMLElement *x = [NSXMLElement elementWithName:@"x" xmlns:XMPPMUCUserNamespace]; 
    [x addChild:decline]; 

    NSXMLElement *message = [XMPPMessage message]; 
    [message addAttributeWithName:@"to" stringValue:Roomname]; 
    [message addChild:x]; 

    [xmppStream sendElement:message];