在服务器端解析NSNetService

Question

我在解析NSNetService时遇到了问题。当NSNetServiceBrowser找到该服务时，我已经成功地解析了NSNetService。

-(void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing{

    if (![self.services containsObject:aNetService]) {

        [aNetService setDelegate:self];
        [aNetService resolveWithTimeout:5.0];
    }
}

则成功调用此方法。

-(void)netServiceDidResolveAddress:(NSNetService *)sender{

    NSArray *addresses = [ns addresses]; 
    NSDictionary* dict = [NSNetService dictionaryFromTXTRecordData:[sender TXTRecordData]];
    // Here both values are ok
}

但我希望将NSNetService解析到服务器端，以获得发布该服务的IP地址。

-(void)netServiceDidPublish:(NSNetService *)ns{

    [ns setDelegate:self];
    [ns resolveWithTimeout:5.0];
}

但是在这里，这个方法并没有调用。

-(void)netServiceDidResolveAddress:(NSNetService *)sender{
   
}

但是我这样做了

-(void)netServiceDidPublish:(NSNetService *)ns
{
    NSArray *addresses = [ns addresses]; // this gives null

    // this also gives null
    NSDictionary* dict = [NSNetService dictionaryFromTXTRecordData:[sender TXTRecordData]];
}

但是值是null。

如果可能的话，请帮帮我。任何帮助都将不胜感激。提前谢谢。

Answer 1

前几天也遇到了这个问题，我花了一段时间才弄明白。出于某种原因，我需要将aNetService赋值给一个属性。

# Declare a NSNetService property in the .h or further up .m file
@property (strong, nonatomic) NSNetService *currentService;

# In the .m file.
-(void)netServiceBrowser:(NSNetServiceBrowser *)aNetServiceBrowser didFindService:(NSNetService *)aNetService moreComing:(BOOL)moreComing{

    if (![self.services containsObject:aNetService]) {
        self.currentService = aNetService;
        [self.currentService setDelegate:self];
        [self.currentService resolveWithTimeout:5.0];
    }
}