Question

需要帮助获取有关好友的状态信息的信息。

我正在调用“fetchRoster”函数，但是我获取了名单列表，但没有显示状态信息。

此外，我尝试显式调用显示的状态信息。但是在我的iOS应用中没有调用didRecievePresence委托。

此致 Cbhat

Answer 1

From Robbiehanson's XMPPFramework - RootViewController class:

获取你的名册

- (NSFetchedResultsController *)fetchedResultsController
{
    if (fetchedResultsController == nil)
    {
        NSManagedObjectContext *moc = [[self appDelegate] managedObjectContext_roster];

        NSEntityDescription *entity = [NSEntityDescription entityForName:@"XMPPUserCoreDataStorageObject"
                                                  inManagedObjectContext:moc];

        NSSortDescriptor *sd1 = [[NSSortDescriptor alloc] initWithKey:@"sectionNum" ascending:YES];
        NSSortDescriptor *sd2 = [[NSSortDescriptor alloc] initWithKey:@"displayName" ascending:YES];

        NSArray *sortDescriptors = [NSArray arrayWithObjects:sd1, sd2, nil];

        NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
        [fetchRequest setEntity:entity];
        [fetchRequest setSortDescriptors:sortDescriptors];
        [fetchRequest setFetchBatchSize:10];

        fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest
                                                                       managedObjectContext:moc
                                                                         sectionNameKeyPath:@"sectionNum"
                                                                                  cacheName:nil];
        [fetchedResultsController setDelegate:self];


        NSError *error = nil;
        if (![fetchedResultsController performFetch:&error])
        {
            DDLogError(@"Error performing fetch: %@", error);
        }
    }

    return fetchedResultsController;
}

只要在服务器中记录用户状态的变化

，就重新加载您的表格

- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller
{
    [[self tableView] reloadData];
}

显示头像（个人资料图片）

- (void)configurePhotoForCell:(UITableViewCell *)cell user:(XMPPUserCoreDataStorageObject *)user
{
    // Our xmppRosterStorage will cache photos as they arrive from the xmppvCardAvatarModule.
    // We only need to ask the avatar module for a photo, if the roster doesn't have it.

    if (user.photo != nil)
    {
        cell.imageView.image = user.photo;
    } 
    else
    {
        NSData *photoData = [[[self appDelegate] xmppvCardAvatarModule] photoDataForJID:user.jid];

        if (photoData != nil)
            cell.imageView.image = [UIImage imageWithData:photoData];
        else
            cell.imageView.image = [UIImage imageNamed:@"defaultPerson"];
    }
}

将表分为两部分 - 可用/离线

- (NSString *)tableView:(UITableView *)sender titleForHeaderInSection:(NSInteger)sectionIndex
{
    NSArray *sections = [[self fetchedResultsController] sections];

    if (sectionIndex < [sections count])
    {
        id <NSFetchedResultsSectionInfo> sectionInfo = [sections objectAtIndex:sectionIndex];

        int section = [sectionInfo.name intValue];
        switch (section)
        {
            case 0  : return @"Available";
            case 1  : return @"Away";
            default : return @"Offline";
        }
    }

    return @"";
}

使用用户的显示名称显示整个名单

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                                       reuseIdentifier:CellIdentifier];
    }

    XMPPUserCoreDataStorageObject *user = [[self fetchedResultsController] objectAtIndexPath:indexPath];

    cell.textLabel.text = user.displayName;
    [self configurePhotoForCell:cell user:user];

    return cell;
}

这包含在您下载的XMPPFramework中。试验它。我说的这5点可能就是你所需要的。

XMPPFramework - 如何接收名册的在线信息以及名单列表？

1 个答案: