接上一章的,這一章我們着重介紹XMPP
爲了方便程序調用,我們把XMPP的一些主要方法寫在AppDelegate中
在AppDelegate.m下這幾個方法爲:
- -(void)setupStream{
- //初始化XMPPStream
- xmppStream = [[XMPPStream alloc] init];
- [xmppStream addDelegate:self delegateQueue:dispatch_get_current_queue()];
- }
- -(void)goOnline{
- //發送在線狀態
- XMPPPresence *presence = [XMPPPresence presence];
- [[self xmppStream] sendElement:presence];
- }
- -(void)goOffline{
- //發送下線狀態
- XMPPPresence *presence = [XMPPPresence presenceWithType:@"unavailable"];
- [[self xmppStream] sendElement:presence];
- }
- -(BOOL)connect{
- [self setupStream];
- //從本地取得用戶名,密碼和服務器地址
- 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;
- }
- //設置用戶
- [xmppStream setMyJID:[XMPPJID jidWithString:userId]];
- //設置服務器
- [xmppStream setHostName:server];
- //密碼
- password = pass;
- //連接服務器
- NSError *error = nil;
- if (![xmppStream connect:&error]) {
- NSLog(@"cant connect %@", server);
- return NO;
- }
- return YES;
- }
- -(void)disconnect{
- [self goOffline];
- [xmppStream disconnect];
- }
- //連接服務器
- - (void)xmppStreamDidConnect:(XMPPStream *)sender{
- isOpen = YES;
- NSError *error = nil;
- //驗證密碼
- [[self xmppStream] authenticateWithPassword:password error:&error];
- }
- //驗證通過
- - (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"];
- //消息委託(這個後面講)
- [messageDelegate newMessageReceived:dict];
- }
- //收到好友狀態
- - (void)xmppStream:(XMPPStream *)sender didReceivePresence:(XMPPPresence *)presence{
- // NSLog(@"presence = %@", presence);
- //取得好友狀態
- NSString *presenceType = [presence type]; //online/offline
- //當前用戶
- NSString *userId = [[sender myJID] user];
- //在線用戶
- NSString *presenceFromUser = [[presence from] user];
- if (![presenceFromUser isEqualToString:userId]) {
- //在線狀態
- if ([presenceType isEqualToString:@"available"]) {
- //用戶列表委託(後面講)
- [chatDelegate newBuddyOnline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
- }else if ([presenceType isEqualToString:@"unavailable"]) {
- //用戶列表委託(後面講)
- [chatDelegate buddyWentOffline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
- }
- }
- }
定義完兩個委託,我們就要在不同的Controller中實現這兩個委託了
在好友Controller中實現<KKChatDelegate>並寫入如下方法
- //取得當前程序的委託
- -(KKAppDelegate *)appDelegate{
- return (KKAppDelegate *)[[UIApplication sharedApplication] delegate];
- }
- //取得當前的XMPPStream
- -(XMPPStream *)xmppStream{
- return [[self appDelegate] xmppStream];
- }
- //在線好友
- -(void)newBuddyOnline:(NSString *)buddyName{
- if (![onlineUsers containsObject:buddyName]) {
- [onlineUsers addObject:buddyName];
- [self.tView reloadData];
- }
- }
- //好友下線
- -(void)buddyWentOffline:(NSString *)buddyName{
- [onlineUsers removeObject:buddyName];
- [self.tView reloadData];
- }
- //設定在線用戶委託
- KKAppDelegate *del = [self appDelegate];
- del.chatDelegate = self;
在viewWillAppear中加入
- [super viewWillAppear:animated];
- NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"userId"];
- if (login) {
- if ([[self appDelegate] connect]) {
- NSLog(@"show buddy list");
- }
- }else {
- //設定用戶
- [self Account:self];
- }
這裏最重要的就是connect了,這一句話就是登錄了,成功的話,頁面就會顯示好友列表了。
- #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;
- }
- }
當顯示出好友列表,我們選擇一個好友進行聊天
將當前好友名稱發送給聊天頁面
下面是聊天Controller了
在KKChatController.h中加入
- NSMutableArray *messages;
接下來就是每一條消息的顯示了
- -(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;
- }
- -(KKAppDelegate *)appDelegate{
- return (KKAppDelegate *)[[UIApplication sharedApplication] delegate];
- }
- -(XMPPStream *)xmppStream{
- return [[self appDelegate] xmppStream];
- }
- KKAppDelegate *del = [self appDelegate];
- del.messageDelegate = self;
- #pragma mark KKMessageDelegate
- -(void)newMessageReceived:(NSDictionary *)messageCotent{
- [messages addObject:messageCotent];
- [self.tView reloadData];
- }
- - (IBAction)sendButton:(id)sender {
- //本地輸入框中的信息
- NSString *message = self.messageTextField.text;
- if (message.length > 0) {
- //XMPPFramework主要是通過KissXML來生成XML文件
- //生成<body>文檔
- NSXMLElement *body = [NSXMLElement elementWithName:@"body"];
- [body setStringValue:message];
- //生成XML消息文檔
- NSXMLElement *mes = [NSXMLElement elementWithName:@"message"];
- //消息類型
- [mes addAttributeWithName:@"type" stringValue:@"chat"];
- //發送給誰
- [mes addAttributeWithName:@"to" stringValue:chatWithUser];
- //由誰發送
- [mes addAttributeWithName:@"from" stringValue:[[NSUserDefaults standardUserDefaults] stringForKey:USERID]];
- //組合
- [mes addChild:body];
- //發送消息
- [[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];
- }
- }