GCDAsyncSocket多连接？

Question

我已经使用GCDAsyncSocket来连接两个设备。一个设备广播它自己并接受连接，另一个设备监听并请求连接。

如果我尝试将另一个设备连接到正在广播的主机上，它会连接，然后在第一个设备仍然连接时获得连接终止！

我该如何重构我的代码以接受多个连接？我错过了什么？请帮帮我，我一直在努力解决这个问题！这是我的代码：

- (void)startBroadcast {
    // Initialize GCDAsyncSocket
    self.socket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];

    // Start Listening for Incoming Connections
    NSError *error = nil;
    if ([self.socket acceptOnPort:0 error:&error]) {
        // Initialize Service
        self.service = [[NSNetService alloc] initWithDomain:@"local." type:@"_iQuest._tcp." name:@"" port:[self.socket localPort]];

        // Configure Service
        [self.service setDelegate:self];

        // Publish Service
        [self.service publish];

    } else {
        NSLog(@"Unable to create socket. Error %@ with user info %@.", error, [error userInfo]);
    }
}

---

   - (void)socket:(GCDAsyncSocket *)socket didAcceptNewSocket:(GCDAsyncSocket *)newSocket {
        NSLog(@"Accepted New Socket from %@:%hu", [newSocket connectedHost], [newSocket connectedPort]);
        NSString *alertmsg = [NSString stringWithFormat:@"Client is now connected to %@.", self.service.name];
        UIAlertView *Connection = [[UIAlertView alloc] initWithTitle:@"Connection Success!" message:alertmsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
        [Connection show];

        [self setSocket:newSocket];
        [connectedSockets addObject:newSocket];

            // Read Data from Socket
        [newSocket readDataToLength:sizeof(uint64_t) withTimeout:-1.0 tag:0];
    }

    - (void)socket:(GCDAsyncSocket *)socket didReadData:(NSData *)data withTag:(long)tag {
        if (tag == 0) {
            uint64_t bodyLength = [self parseHeader:data];
            [socket readDataToLength:bodyLength withTimeout:-1.0 tag:1];

        } else if (tag == 1) {
            [self parseBody:data];
            [socket readDataToLength:sizeof(uint64_t) withTimeout:-1.0 tag:0];
        }
    }

- JasonH

---

你能展示一下设置监听套接字的代码吗？也就是acceptOnPort的调用。 - Paulw11

另外，对 [self setSocket:newSocket] 的调用看起来有些可疑。这个方法是做什么的？它能正确处理多个连接的套接字吗？ - Paulw11

是的，好的，我已经添加了它正在广播和监听连接。我还怀疑"[self setSocket:newSocket]"，因为这只是添加新连接。我在其他代码示例中看到过使用"[connectedSockets addObject:newSocket]"来添加到数组中，但我不清楚如何修改代码！ - JasonH

Answer 1

好的，我解决了！希望这能帮助未来遇到类似问题的人：

- (void)startBroadcast {
    //socketQueue = dispatch_queue_create("socketQueue", NULL);

    self.socket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
    // Setup an array to store all accepted client connections
    connectedSockets = [[NSMutableArray alloc] initWithCapacity:20];


    // Start Listening for Incoming Connections
    NSError *error = nil;
    if ([self.socket acceptOnPort:0 error:&error]) {
        // Initialize Service
        self.service = [[NSNetService alloc] initWithDomain:@"local." type:@"_iQuest._tcp." name:@"" port:[self.socket localPort]];

        // Configure Service
        [self.service setDelegate:self];

        // Publish Service
        [self.service publish];

    } else {
        NSLog(@"Unable to create socket. Error %@ with user info %@.", error, [error userInfo]);
    }
}

---

- (void)socket:(GCDAsyncSocket *)socket didAcceptNewSocket:(GCDAsyncSocket *)newSocket {
    NSLog(@"Accepted New Socket from %@:%hu", [newSocket connectedHost], [newSocket connectedPort]);
    NSString *alertmsg = [NSString stringWithFormat:@"Client is now connected to %@.", self.service.name];
    UIAlertView *Connection = [[UIAlertView alloc] initWithTitle:@"Connection Success!" message:alertmsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [Connection show];

    @synchronized(connectedSockets)
    {
        dispatch_async(dispatch_get_main_queue(), ^{
            [connectedSockets addObject:newSocket];
        });
    }


    // Read Data from Socket
    [newSocket readDataToLength:sizeof(uint64_t) withTimeout:-1.0 tag:0];
}

- JasonH