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。使用不论什么一个组织或者个人提供的即使通信服务,都可以无障碍的与其它的及时通信服务的用户进行交流。比如 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。
以下我们就谈论一下怎样简单的使用 XMPP 的接收和发送消息
- //消息存档
- @property(nonatomic,strong) XMPPMessageArchiving * messageArch;
- //消息存档存储模型
- @property(nonatomic,strong) XMPPMessageArchivingCoreDataStorage * messageStore;
- 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;
- //開始查询
- [fetch performFetch:nil];
- -(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;
- }
- [[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;
- }];
- }
- -(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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