[iPhone高級] 基於XMPP的IOS聊天客戶端程序
為了方便程序調用，我們把XMPP的一些主要方法寫在AppDelegate中
在AppDelegate.m下這幾個方法為：
[java]
-(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];
}
-(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];
}這幾個是基礎方法，接下來就是XMPPStreamDelegate中的方法，也是接受好友狀態，接受消息的重要方法
[java]
//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"];
//消息委托(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"]) {
//用戶列表委托(後面講)
[chatDelegate newBuddyOnline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
}else if ([presenceType isEqualToString:@"unavailable"]) {
//用戶列表委托(後面講)
[chatDelegate buddyWentOffline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
}
}
}
//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"];
//消息委托(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"]) {
//用戶列表委托(後面講)
[chatDelegate newBuddyOnline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
}else if ([presenceType isEqualToString:@"unavailable"]) {
//用戶列表委托(後面講)
[chatDelegate buddyWentOffline:[NSString stringWithFormat:@"%@@%@", presenceFromUser, @"nqc1338a"]];
}
}
}
這裡面有兩個委托方法，一個是用戶列表委托，還有一個就是消息委托，用戶列表委托主要就是取得在線用戶，更新用戶TableView，消息委托就是取得好友發送的消息，並更新消息TableView，當然這兩個TableView是在不同的Controller中的
定義完兩個委托，我們就要在不同的Controller中實現這兩個委托了
在好友Controller中實現<KKChatDelegate>並寫入如下方法
[java]
//取得當前程序的委托
-(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];
}
//取得當前程序的委托
-(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];
}
在viewDidLoad中加入
[java]
//設定在線用戶委托
KKAppDelegate *del = [self appDelegate];
del.chatDelegate = self;
//設定在線用戶委托
KKAppDelegate *del = [self appDelegate];
del.chatDelegate = self;這兩行代碼，讓好友列表的委托實現方法在本程序中
在viewWillAppear中加入
[java]
[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];
}
[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];
}
判斷本地保存的數據中是否有userId，沒有的話就跳轉到登錄頁面
這裡最重要的就是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。
[java]
#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;
}
}
#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
[java]
NSMutableArray *messages;
NSMutableArray *messages;這是我們要顯示的消息，每一條消息為一條字典
接下來就是每一條消息的顯示了
[java]
-(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;
}
-(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一樣，這裡我們也需要XMPPStream
[java]
-(KKAppDelegate *)appDelegate{
return (KKAppDelegate *)[[UIApplication sharedApplication] delegate];
}
-(XMPPStream *)xmppStream{
return [[self appDelegate] xmppStream];
}
-(KKAppDelegate *)appDelegate{
return (KKAppDelegate *)[[UIApplication sharedApplication] delegate];
}
-(XMPPStream *)xmppStream{
return [[self appDelegate] xmppStream];
}
在ViewDidLoad中加入
[java]
KKAppDelegate *del = [self appDelegate];
del.messageDelegate = self;
KKAppDelegate *del = [self appDelegate];
del.messageDelegate = self;
設定消息委托由自己來接收和處理
[java]
#pragma mark KKMessageDelegate
-(void)newMessageReceived:(NSDictionary *)messageCotent{
[messages addObject:messageCotent];
[self.tView reloadData];
}
#pragma mark KKMessageDelegate
-(void)newMessageReceived:(NSDictionary *)messageCotent{
[messages addObject:messageCotent];
[self.tView reloadData];
}接下來最重要的就是發送消息了
[java]
- (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];
}
}
- (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];
}
}上面都加了注釋，大家應該能明白，接下來還有一個章節，我們會對發送的消息在界面進行美化，跟蘋果自帶的消息一樣。謝謝大家有耐心看完，我這個人比較不喜歡打字，所以有的地方注釋比較少，希望大家別介意，還有希望大家能夠多多支持， 以後會接著介紹XMPP文件傳輸之類的內容。
作者：kangkangz4
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