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距离上次写《GCDAynscSocket简单使用-服务端》差不多一个月了，现在把服务端的介绍给补上。
服务端的介绍比较简单，因为服务端和客户端的接收和发送数据的方法是一样的，不同的地方在于服务端是开启一个服务被动的等待客户端的接入。所以只介绍一下如何开启和关闭服务。
1、开启服务
GCDAynscSocket封装的非常好了，大部分情况下我们只要调用它的接口就可以了。
开启服务可调用的方法：
/**
* Tells the socket to begin listening and accepting connections on the given port.
* When a connection is accepted, a new instance of GCDAsyncSocket will be spawned to handle it,
* and the socket:didAcceptNewSocket: delegate method will be invoked.
*
* The socket will listen on all available interfaces (e.g. wifi, ethernet, etc)
**/
- (BOOL)acceptOnPort:(uint16_t)port error:(NSError **)errPtr;
此方法绑定一个端口号port, errPtr是错误变量，可通过该变量判断服务开启是否成功
// 定义一个标志位，用于判断当前服务是否开启
BOOL isRunning;
/**
* @brief 开启服务
*/
- (void)startServer
{
if (!isRunning)
{
[self initServer];
[_serverSocket readDataWithTimeout:-1 tag:0];
isRunning = YES;
}
}
/**
* @brief 服务端初始化
*/
- (void)initServer
{
allClientArray = [NSMutableArray array];
dispatch_queue_t socketQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
_serverSocket = [[GCDAsyncSocket alloc]initWithDelegate:self delegateQueue:socketQueue];
NSError *error = nil;
[_serverSocket acceptOnPort:_socketPort error:&error];
if (error != nil)
{
NSLog(@"error --> %@", error);
}
else
{
NSLog(@"server start...");
}
}
2、关闭服务
停止服务直接调用- (void)disconnect方法即可
/**
* @brief 停止服务
*/
- (void)stopServer
{
if (isRunning)
{
[_serverSocket disconnect];
isRunning = NO;
NSLog(@"server stop...");
}
}
3、委托方法
在有客户端接入的服务器时，会调用下面三个委托方法：
/**
* This method is called immediately prior to socket:didAcceptNewSocket:.
* It optionally allows a listening socket to specify the socketQueue for a new accepted socket.
* If this method is not implemented, or returns NULL, the new accepted socket will create its own default queue.
*
* Since you cannot autorelease a dispatch_queue,
* this method uses the "new" prefix in its name to specify that the returned queue has been retained.
*
* Thus you could do something like this in the implementation:
* return dispatch_queue_create("MyQueue", NULL);
*
* If you are placing multiple sockets on the same queue,
* then care should be taken to increment the retain count each time this method is invoked.
*
* For example, your implementation might look something like this:
* dispatch_retain(myExistingQueue);
* return myExistingQueue;
**/
- (dispatch_queue_t)newSocketQueueForConnectionFromAddress:(NSData *)address onSocket:(GCDAsyncSocket *)sock
/**
* Called when a socket accepts a connection.
* Another socket is automatically spawned to handle it.
*
* You must retain the newSocket if you wish to handle the connection.
* Otherwise the newSocket instance will be released and the spawned connection will be closed.
*
* By default the new socket will have the same delegate and delegateQueue.
* You may, of course, change this at any time.
**/
- (void)socket:(GCDAsyncSocket *)sock didAcceptNewSocket:(GCDAsyncSocket *)newSocket
/**
* Called when a socket connects and is ready for reading and writing.
* The host parameter will be an IP address, not a DNS name.
**/
- (void)socket:(GCDAsyncSocket *)sock didConnectToHost:(NSString *)host port:(uint16_t)port;
客户端和服务端的代码比较简单，demo修改后我会上传，PS:目前还没发现可以上传的地方
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原文地址：http://www.cnblogs.com/songshu-yilia/p/4613819.html
