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 andPResence 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=[UIapplicationsharedApplication].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:UIKeyboardWillShowNotificationobject:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(hideKey:) name:UIKeyboardWillHideNotificationobject: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 ];returncell;
}
6、增加键盘控制[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showKey:) name:UIKeyboardWillShowNotificationobject:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(hideKey:) name:UIKeyboardWillHideNotificationobject: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;returnYES;
}
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作者：杰瑞教育
出处：http://www.cnblogs.com/jerehedu/
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