GCDAsyncSocket 地址: https://github.com/robbiehanson/CocoaAsyncSocket/
使用方法:
创建:
asyncsocket
= [[GCDAsyncSocket alloc] initWithDelegate: self delegateQueue:dispatch_get_main_queue()]; |
这里我们让所有的回调执行都发生在主线程的queue里,当然我们可以传一个专用的queue.
连接 :
NSError *err
= nil ; if (![asyncsocket
connectToHost:@ "deusty.com" onPort:80
error:&err]) //
Asynchronous! { //该方法异步,返回错误是因为
delegate没设置等 NSLog (@ "I
goofed: %@" ,
err); } |
该方法会立刻返回,当成功连接上,delegate 的 socket:didConnectToHost:port: 方法会被调用.
-
( void )socket:(GCDAsyncSocket
*)sender didConnectToHost:( NSString *)host
port:(UInt16)port { NSLog (@ "Cool,
I'm connected! That was easy." ); } |
有几种不同的连接方法,比如带超时的.。。。
虽然这个时候可能 socket 还没连接上,但是我们依然可以投递 读/写 请求:
[asyncSocket
readDataToLength:LENGTH_HEADER withTimeout:-1 tag:TAG_HEADER]; |
这样读请求会自动进入了队列,当socket 连接上后,请求会自动出队被执行。(这里假设先读一个包头,再根据长度接收包体,这个读操作完成后 socket:didReadData:withTag: 会被调用)
当然我们可以投递多个读写操作而不必等待上一个完成.
[asyncSocket
writeData:msgHeader withTimeout:-1 tag:TAG_HEADER]; [asyncSocket
writeData:msgBody withTimeout:-1 tag:TAG_BODY]; |
上面的操作均为异步。下面为操作完成的委托方法:
read:
- (void)socket:(GCDAsyncSocket *)sender didReadData:(NSData *)data withTag:(long)tag { if (tag == TAG_HEADER) { int bodyLength = [self parseHeader:data]; [socket readDataToLength:bodyLength withTimeout:-1 tag:TAG_RESPONSE_BODY]; } else if (tag == TAG_RESPONSE_BODY) { // Process the response [self handleResponseBody:data]; // Start reading the next response [socket readDataToLength:headerLength withTimeout:-1 tag:TAG_FIXED_LENGTH_HEADER]; } } //还有另一个读方法, // [asyncSocket readDataToData:msgSeparator withTimeout:TIMEOUT_NONE tag:TAG_CAPABILITIES]; // 读当遇到一个指定的分隔符后操作返回。比如用作 http, 因为http 每个消息都会有一个@"\r\n\r\n" 结尾标志.
//如果想跟踪进度 socket: didReadPartialDataOfLength: tag: 用这个
write:
-
( void )socket:(GCDAsyncSocket
*)sock didWriteDataWithTag:( long )tag { if (tag
==TAG_HEADER) <br> NSLog (@ "TAG_HEADER
request sent" ); |
else if (tag
==TAG_BODY) <br> NSLog (@ "TAG_BODY
request sent" ); |
} |
断开释放一个连接实例
[asyncSocket
setDelegate: nil delegateQueue: NULL ]; [asyncSocket
disconnect]; [asyncSocket
release]; |
相关的delegate 方法(回调)
socket:
didConnectToHost: port:<br> socket:
didReadData: withTag: socket:
didReadPartialDataOfLength: tag: socket:
shouldTimeoutReadWithTag: elapsed: bytesDone:<br> socket:
didWriteDataWithTag: socket:
didWritePartialDataOfLength: tag: socket:
shouldTimeoutWriteWithTag: elapsed: bytesDone:<br> socketDidSecure:<br> socket:
didAcceptNewSocket:<br> newSocketQueueForConnectionFromAddress:
onSocket:<br> socketDidCloseReadStream:<br> socketDidDisconnect:
withError:
|