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;

}

 

　　想要了解更多内容的小伙伴，可以点击查看源码，亲自运行测试。

　　疑问咨询或技术交流，请加入官方QQ群： （452379712）

 

作者： 杰瑞教育
出处： http://www.cnblogs.com/jerehedu/ 
本文版权归烟台杰瑞教育科技有限公司和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。