［XMPP］iOS聊天软件学习笔记［三］

今天做了好友界面，其实xmpp内部已经写好很多扩展模块，所以使用起来还是很方便的

开发时间：五天（工作时间）

开发工具：xcode6

开发平台：iOS8

XMPP框架：XMPPFramework

git clone https://github.com/robbiehanson/XMPPFramework.git 

界面设计：使用StoryBoard 

github地址：https://github.com/hjandyz/XMPP

1.每一个模块创建以后都需要激活，比如自动连接模块

//自动连接模块 

_reconnect = [[XMPPReconnect alloc] init];

[_reconnect activate:_XMPPStream]; 

2.CoreData 的用法

- (void)loadFriends

{

    //1.上下文关联数据库

    NSManagedObjectContext *context = [HJXMPPTool sharedHJXMPPTool].rosterSrorage.mainThreadManagedObjectContext;

    //2.创建FetchRequest请求

    NSFetchRequest *fetchRequest = [NSFetchRequest fetchRequestWithEntityName:@"XMPPUserCoreDataStorageObject"];

    //3.过滤和排序

    //当年登陆用户的好友

    NSString *jid = [HJUserInfo sharedHJUserInfo].jid;

    NSPredicate *pre = [NSPredicate predicateWithFormat:@"streamBareJidStr = %@",jid];

    fetchRequest.predicate = pre;

    //排序

    NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"displayName" ascending:YES];

    fetchRequest.sortDescriptors = @[sort];

    //4.执行请求

    _resultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:context sectionNameKeyPath:nil cacheName:nil];

    _resultsController.delegate = self;

    NSError *err = nil;

    [_resultsController performFetch:&err];

    HJLog(@"%@",err);

} 

3.销毁的方法也很重要

#pragma mark 销毁

- (void)teardownXmpp

{

    //停止模块

    [_XMPPStream removeDelegate:self];

    [_reconnect deactivate];

    [_avatar deactivate];

    [_vCard deactivate];

    [_roster deactivate];

    //断块连接

    [_XMPPStream disconnect];

    //清空资源

    _reconnect = nil;

    _vCard = nil;

    _vCardStorage = nil;

    _avatar = nil;

    _XMPPStream = nil;

    _roster = nil;

    _rosterSrorage = nil;

} 

4.添加好友的方法

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    NSString *user = textField.text;

    if (![textField isTelphoneNum]) {

        [self showAlert:@"请输入正确的手机号码"];

        return YES;

    }

    //判断是否自己或者好友已经存在

    if ([user isEqualToString:[HJUserInfo sharedHJUserInfo].user]) {

        [self showAlert:@"不能添加自己"];

    }

     XMPPJID *friendJid = [XMPPJID jidWithString:[NSString stringWithFormat:@"%@%@", user, DomainKey]];

        if([[HJXMPPTool sharedHJXMPPTool].rosterSrorage userExistsWithJID:friendJid xmppStream:[HJXMPPTool sharedHJXMPPTool].XMPPStream]){

            [self showAlert:@"已经是你的好友了"];

    }

    [[HJXMPPTool sharedHJXMPPTool].roster subscribePresenceToUser:friendJid];

    return YES;

}

5.删除好友的方法

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath

{

    if (editingStyle == UITableViewCellEditingStyleDelete) {

        XMPPUserCoreDataStorageObject *user = _resultsController.fetchedObjects[indexPath.row];

        XMPPJID *jid = user.jid;

        [[HJXMPPTool sharedHJXMPPTool].roster removeUser:jid];

    }

}

剩下的就不一一讲了，具体可以看代码