NSNet服务问题

发布于 2024-11-10 01:32:43 字数 2326 浏览 3 评论 0原文

我正在尝试在 iOS 设备和 Mac 之间建立 Bonjour 连接。发现彼此的效果很好，但我在 setTXTRecordData: 方面遇到了问题。它总是失败（BOOL 返回 NO）...

_serviceInstances 创建：

-(void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing
{
    [aNetService retain];

    [aNetService setDelegate:self];
    [aNetService startMonitoring];

    [aNetService performSelectorOnMainThread:@selector(resolve) withObject:nil waitUntilDone:YES];
[_serviceInstances addObject:aNetService];
}

发送尝试：

NSNetService*service = [_serviceInstances objectAtIndex:[servicesTable selectedRow]];

[service setDelegate:self];

NSDictionary*txtRecordDataDictionary = [NSDictionary dictionaryWithObject:@"2" forKey:@"Version"];

if (service)
{
    BOOL success = [service setTXTRecordData:[NSNetService dataFromTXTRecordDictionary:txtRecordDataDictionary]];   

    if (!success)
    {
        NSRunCriticalAlertPanel(@"Sync Error", @"Failed to contact Client. Please restart Carbon on your iPad and try again.", @"OK", nil, nil);
    }

    NSLog(@"Service: %@",service);
}

NSLog 消息输出 Service:当地的。 _测试._tcp。 David 的 iPad 这是正确的。

iOS 代码：

NSNetService*service = [[NSNetService alloc] initWithDomain:@"local." type:@"_test._tcp." name:[[UIDevice currentDevice] name] port:28];
[service setDelegate:self];
[service setTXTRecordData:nil];
[service publish];

[service startMonitoring];


- (void)netService:(NSNetService *)sender didUpdateTXTRecordData:(NSData *)data
{
    NSLog(@"Got Data! of %@",sender);

    NSPropertyListFormat format;
    NSDictionary*dict = [NSPropertyListSerialization propertyListFromData:data mutabilityOption:NSPropertyListImmutable format:&format errorDescription:nil];


    UIAlertView *myAlert = [[UIAlertView alloc]
                            initWithTitle:[sender name] message:[dict objectForKey:@"Version"]
                            delegate:self 
                            cancelButtonTitle:nil
                            otherButtonTitles:@"OK", nil];
    [myAlert show];  
    [myAlert release];
}

由于某种原因，当我启动 iPad 应用程序时会调用警报（标题除外的空白内容），但不会响应来自 Mac 的任何信号。

我确定我错过了什么？

原文

I am trying to establish a Bonjour connection between an iOS device and a Mac. Discovering each other is working great, but I am having problems with setTXTRecordData:. It always fails (BOOL returns NO)...

_serviceInstances creation:

-(void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing
{
    [aNetService retain];

    [aNetService setDelegate:self];
    [aNetService startMonitoring];

    [aNetService performSelectorOnMainThread:@selector(resolve) withObject:nil waitUntilDone:YES];
[_serviceInstances addObject:aNetService];
}

Sending attempt:

NSNetService*service = [_serviceInstances objectAtIndex:[servicesTable selectedRow]];

[service setDelegate:self];

NSDictionary*txtRecordDataDictionary = [NSDictionary dictionaryWithObject:@"2" forKey:@"Version"];

if (service)
{
    BOOL success = [service setTXTRecordData:[NSNetService dataFromTXTRecordDictionary:txtRecordDataDictionary]];   

    if (!success)
    {
        NSRunCriticalAlertPanel(@"Sync Error", @"Failed to contact Client. Please restart Carbon on your iPad and try again.", @"OK", nil, nil);
    }

    NSLog(@"Service: %@",service);
}

The NSLog message outputs Service: <NSNetService 0x441b40> local. _test._tcp. David's iPad which is correct.

iOS Code:

NSNetService*service = [[NSNetService alloc] initWithDomain:@"local." type:@"_test._tcp." name:[[UIDevice currentDevice] name] port:28];
[service setDelegate:self];
[service setTXTRecordData:nil];
[service publish];

[service startMonitoring];


- (void)netService:(NSNetService *)sender didUpdateTXTRecordData:(NSData *)data
{
    NSLog(@"Got Data! of %@",sender);

    NSPropertyListFormat format;
    NSDictionary*dict = [NSPropertyListSerialization propertyListFromData:data mutabilityOption:NSPropertyListImmutable format:&format errorDescription:nil];


    UIAlertView *myAlert = [[UIAlertView alloc]
                            initWithTitle:[sender name] message:[dict objectForKey:@"Version"]
                            delegate:self 
                            cancelButtonTitle:nil
                            otherButtonTitles:@"OK", nil];
    [myAlert show];  
    [myAlert release];
}

For some reason, the alert is called when I launch the iPad app (blank contents except for the title) but doesnt respond to any signals from my Mac.

I am sure I am missing something?

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君勿笑 2024-11-17 01:32:43

只有服务的发布者可以设置TXT记录数据。已发布服务的发现者可以读取 TXT 记录，但无法更改它。 TXT 记录为服务发布者提供了一种发布附加的、公开可读的数据的方法，这些数据可以从 DNS 条目中读取，而无需直接联系发布者。

预计到达时间： 至少，NSNetService 的文档表明您无需解析服务即可获取 TXT 记录数据。 CFNetService 文档指出，您必须先解析该服务，然后才能获取 TXT 记录数据。 CFNetService 和 NSNetService 似乎都只能使用可能的 DNS-SD 记录的子集，这些记录可以使用，它允许将多个 TXT 记录附加到单个广告服务。