[iPhone高级] 基于XMPP的IOS聊天客户端程序(IOS端二)

来源:互联网 发布:linux中文横着显示 编辑:程序博客网 时间:2024/06/04 19:13

接上一章的,这一章我们着重介绍XMPP

为了方便程序调用,我们把XMPP的一些主要方法写在AppDelegate中


在AppDelegate.m下这几个方法为:

-(void)setupStream{        //初始化XMPPStream    xmppStream = [[XMPPStream alloc] init];    [xmppStream addDelegate:self delegateQueue:dispatch_get_current_queue()];    }-(void)goOnline{        //发送在线状态    XMPPPresence *presence = [XMPPPresence presence];    [[self xmppStream] sendElement:presence];    }-(void)goOffline{        //发送下线状态    XMPPPresence *presence = [XMPPPresence presenceWithType:@"unavailable"];    [[self xmppStream] sendElement:presence];    }-(BOOL)connect{        [self setupStream];        //从本地取得用户名,密码和服务器地址    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];        NSString *userId = [defaults stringForKey:USERID];    NSString *pass = [defaults stringForKey:PASS];    NSString *server = [defaults stringForKey:SERVER];        if (![xmppStream isDisconnected]) {        return YES;    }        if (userId == nil || pass == nil) {        return NO;    }        //设置用户    [xmppStream setMyJID:[XMPPJID jidWithString:userId]];    //设置服务器    [xmppStream setHostName:server];    //密码    password = pass;        //连接服务器    NSError *error = nil;    if (![xmppStream connect:&error]) {        NSLog(@"cant connect %@", server);        return NO;    }        return YES;}-(void)disconnect{        [self goOffline];    [xmppStream disconnect];    }
这几个是基础方法,接下来就是XMPPStreamDelegate中的方法,也是接受好友状态,接受消息的重要方法

//连接服务器- (void)xmppStreamDidConnect:(XMPPStream *)sender{        isOpen = YES;    NSError *error = nil;    //验证密码    [[self xmppStream] authenticateWithPassword:password error:&error];    }//验证通过- (void)xmppStreamDidAuthenticate:(XMPPStream *)sender{        [self goOnline];}//收到消息- (void)xmppStream:(XMPPStream *)sender didReceiveMessage:(XMPPMessage *)message{    //    NSLog(@"message = %@", message);        NSString *msg = [[message elementForName:@"body"] stringValue];    NSString *from = [[message attributeForName:@"from"] stringValue];        NSMutableDictionary *dict = [NSMutableDictionary dictionary];    [dict setObject:msg forKey:@"msg"];    [dict setObject:from forKey:@"sender"];        //消息委托(这个后面讲)    [messageDelegate newMessageReceived:dict];    }//收到好友状态- (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence{    //    NSLog(@"presence = %@", presence);        //取得好友状态    NSString *presenceType = [presence type]; //online/offline    //当前用户    NSString *userId = [[sender myJID] user];    //在线用户    NSString *presenceFromUser = [[presence from] user];        if (![presenceFromUser isEqualToString:userId]) {                //在线状态        if ([presenceType isEqualToString:@"available"]) {                        //用户列表委托(后面讲)            [chatDelegate newBuddyOnline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];                    }else if ([presenceType isEqualToString:@"unavailable"]) {            //用户列表委托(后面讲)            [chatDelegate buddyWentOffline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];        }            }}
这里面有两个委托方法,一个是用户列表委托,还有一个就是消息委托,用户列表委托主要就是取得在线用户,更新用户TableView,消息委托就是取得好友发送的消息,并更新消息TableView,当然这两个TableView是在不同的Controller中的



定义完两个委托,我们就要在不同的Controller中实现这两个委托了

在好友Controller中实现<KKChatDelegate>并写入如下方法

//取得当前程序的委托-(KKAppDelegate *)appDelegate{        return (KKAppDelegate *)[[UIApplication sharedApplication] delegate];    }//取得当前的XMPPStream-(XMPPStream *)xmppStream{        return [[self appDelegate] xmppStream];}//在线好友-(void)newBuddyOnline:(NSString *)buddyName{        if (![onlineUsers containsObject:buddyName]) {        [onlineUsers addObject:buddyName];        [self.tView reloadData];    }    }//好友下线-(void)buddyWentOffline:(NSString *)buddyName{        [onlineUsers removeObject:buddyName];    [self.tView reloadData];    }
在viewDidLoad中加入

//设定在线用户委托    KKAppDelegate *del = [self appDelegate];    del.chatDelegate = self;
这两行代码,让好友列表的委托实现方法在本程序中

viewWillAppear中加入

    [super viewWillAppear:animated];        NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"userId"];        if (login) {                if ([[self appDelegate] connect]) {            NSLog(@"show buddy list");                    }            }else {                //设定用户        [self Account:self];            }
判断本地保存的数据中是否有userId,没有的话就跳转到登录页面

这里最重要的就是connect了,这一句话就是登录了,成功的话,页面就会显示好友列表了。

#pragma mark UITableViewDelegate-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{        //start a Chat    chatUserName = (NSString *)[onlineUsers objectAtIndex:indexPath.row];        [self performSegueWithIdentifier:@"chat" sender:self];    }-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{        if ([segue.identifier isEqualToString:@"chat"]) {        KKChatController *chatController = segue.destinationViewController;        chatController.chatWithUser = chatUserName;    }}

当显示出好友列表,我们选择一个好友进行聊天

将当前好友名称发送给聊天页面

下面是聊天Controller了

在KKChatController.h中加入

NSMutableArray *messages;
这是我们要显示的消息,每一条消息为一条字典

接下来就是每一条消息的显示了

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{        static NSString *identifier = @"msgCell";        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];        if (cell == nil) {        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];    }        NSMutableDictionary *dict = [messages objectAtIndex:indexPath.row];        cell.textLabel.text = [dict objectForKey:@"msg"];    cell.detailTextLabel.text = [dict objectForKey:@"sender"];    cell.accessoryType = UITableViewCellAccessoryNone;        return cell;    }
跟上面好友Controller一样,这里我们也需要XMPPStream

-(KKAppDelegate *)appDelegate{        return (KKAppDelegate *)[[UIApplication sharedApplication] delegate];}-(XMPPStream *)xmppStream{        return [[self appDelegate] xmppStream];}
在ViewDidLoad中加入

KKAppDelegate *del = [self appDelegate];del.messageDelegate = self;
设定消息委托由自己来接收和处理

#pragma mark KKMessageDelegate-(void)newMessageReceived:(NSDictionary *)messageCotent{        [messages addObject:messageCotent];        [self.tView reloadData];    }
接下来最重要的就是发送消息了

- (IBAction)sendButton:(id)sender {        //本地输入框中的信息    NSString *message = self.messageTextField.text;        if (message.length > 0) {                //XMPPFramework主要是通过KissXML来生成XML文件        //生成<body>文档        NSXMLElement *body = [NSXMLElement elementWithName:@"body"];        [body setStringValue:message];                //生成XML消息文档        NSXMLElement *mes = [NSXMLElement elementWithName:@"message"];        //消息类型        [mes addAttributeWithName:@"type" stringValue:@"chat"];        //发送给谁        [mes addAttributeWithName:@"to" stringValue:chatWithUser];        //由谁发送        [mes addAttributeWithName:@"from" stringValue:[[NSUserDefaults standardUserDefaults] stringForKey:USERID]];        //组合        [mes addChild:body];                //发送消息        [[self xmppStream] sendElement:mes];                self.messageTextField.text = @"";        [self.messageTextField resignFirstResponder];                NSMutableDictionary *dictionary = [NSMutableDictionary dictionary];                [dictionary setObject:message forKey:@"msg"];        [dictionary setObject:@"you" forKey:@"sender"];        [messages addObject:dictionary];                //重新刷新tableView        [self.tView reloadData];            }        }
上面都加了注释,大家应该能明白,接下来还有一个章节,我们会对发送的消息在界面进行美化,跟苹果自带的消息一样。谢谢大家有耐心看完,我这个人比较不喜欢打字,所以有的地方注释比较少,希望大家别介意,还有希望大家能够多多支持, 以后会接着介绍XMPP文件传输之类的内容。