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[操作系统]XMPP接受发送消息


  在现阶段的通信服务中,各种标准都有,因此会出现无法实现相互连通,而XMPP(Extensible Message and presence Protocol)协议的出现,实现了整个及时通信服务协议的互通。有了这个协议之后,使用任何一个组织或者个人提供的即使通信服务,都能够无障碍的与其他的及时通信服务的用户进行交流。例如google 公司2005年推出的Google talk就是一款基于XMPP协议的即时通信软件。下面我们就谈论一下如何简单的使用XMPP的接收和发送消息

1、在XMPPFramework.h中将需要用到的头文件打开

 

2、在storyboard创建展示消息页面

 

3、定义查询结果存储器并且进行初始化

//消息存档@property(nonatomic,strong) XMPPMessageArchiving * messageArch;//消息存档存储模型@property(nonatomic,strong) XMPPMessageArchivingCoreDataStorage * messageStore;

4、在上面storyboard创建的控制器中,添加如下代码

AppDelegate * delgate=[UIApplication sharedApplication].delegate;    //初始化头像  XMPPJID * fromJid=[XMPPJID jidWithString:self.fromJid];  NSData * fromData=[delgate.vCardAvatarModule photoDataForJID:fromJid];  self.fromImage=[[UIImage alloc] initWithData:fromData];    NSString * userName= [[NSUserDefaults standardUserDefaults] objectForKey:@"userName"];  XMPPJID * tojid=[XMPPJID jidWithString:userName];    //设置图片模型  NSData * toData=[delgate.vCardAvatarModule photoDataForJID:tojid];  self.meImage=[[UIImage alloc] initWithData:toData];    if (self.fromImage==nil) {    self.fromImage=[UIImage imageNamed:@"defalut"];  }    if (self.meImage==nil) {    self.meImage=[UIImage imageNamed:@"defalut"];  }   [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showKey:) name:UIKeyboardWillShowNotification object:nil];    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(hideKey:) name:UIKeyboardWillHideNotification object:nil];    //初始化数据存储 NSString *user= [[NSUserDefaults standardUserDefaults] objectForKey:@"userName"];    //初始化请求  NSFetchRequest * request=[[NSFetchRequest alloc] initWithEntityName:@"XMPPMessageArchiving_Message_CoreDataObject"];  request.predicate=[NSPredicate predicateWithFormat:@"bareJidStr=%@ and streamBareJidStr=%@",self.fromJid,user];      //定义排序  NSSortDescriptor * des=[NSSortDescriptor sortDescriptorWithKey:@"timestamp" ascending:YES];  [request setSortDescriptors:@[des]];    //获取上下文  NSManagedObjectContext *context=[delgate.messageStore mainThreadManagedObjectContext];    //初始化结果存储器  fetch=[[NSFetchedResultsController alloc] initWithFetchRequest:request managedObjectContext:context sectionNameKeyPath:nil cacheName:nil];    //设置代理  fetch.delegate=self;    //开始查询  [fetch performFetch:nil];  

5、创实现tableView的代理方法

-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{  id <NSFetchedResultsSectionInfo> info=fetch.sections[section];    NSLog(@"===%ld",info.numberOfObjects);  return [info numberOfObjects];  }- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    XMPPMessageArchiving_Message_CoreDataObject * obj=[fetch objectAtIndexPath:indexPath];  JRChatTableViewCell * cell=nil;  if (obj.isOutgoing) {     cell=[tableView dequeueReusableCellWithIdentifier:@"cellto"];  }else{     cell=[tableView dequeueReusableCellWithIdentifier:@"cellfrom"];  }      //设置头像  cell.image.image=self.meImage;  cell.selectionStyle=UITableViewCellSelectionStyleNone;  [cell setText:obj.body WithFlag:obj.isOutgoing ];    return cell;}

6、增加键盘控制

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showKey:) name:UIKeyboardWillShowNotification object:nil];  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(hideKey:) name:UIKeyboardWillHideNotification object:nil];- (void) showKey:(NSNotification * ) notify{    CGFloat time=[notify.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] ;    CGRect frame=[notify.userInfo[UIKeyboardFrameBeginUserInfoKey] CGRectValue];  [UIView animateWithDuration:time animations:^{    self.keyView.transform=CGAffineTransformMakeTranslation(0, frame.size.height*-1);  }];  }- (void) hideKey:(NSNotification * ) notify{      CGFloat time=[notify.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue] ;  [UIView animateWithDuration:time animations:^{    self.keyView.transform=CGAffineTransformIdentity;  }];  }

7、发送消息

-(BOOL)textFieldShouldReturn:(UITextField *)textField{  [textField resignFirstResponder];    //发送消息    //1 取出文本  AppDelegate * delgate=[UIApplication sharedApplication].delegate;    XMPPJID * jid=[XMPPJID jidWithString:self.fromJid];    //初始化消息体  XMPPMessage * message=[XMPPMessage messageWithType:@"chat" to:jid];  [message addBody:self.ketf.text];    //发送消息  [delgate.stream sendElement:message];    //将消息置空  self.ketf.text=nil;  return YES;}

 

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作者:杰瑞教育
出处:http://www.cnblogs.com/jerehedu/ 
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