CAsysncSocket 之--tcp工具--AsyncSocket 用法

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博文原创，转载请声明出处

电子咖啡(原id蓝岩)

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详解iPhone 下AsyncSocket网络库编程是本文要介绍的内容，iphone的标准推荐CFNetwork C库编程.但是编程比较烦躁。在其它OS往往用类来封装的对Socket函数的处理。比如MFC的CAsysncSocket.在iphone也有类似于开源项目.cocoa AsyncSocket库

官方网站:http://code.google.com/p/cocoaasyncsocket/

这里只上例子，自己在项目中使用的，绝对能使用，如果有疑问，欢迎留言讨论。

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注意，CAsysncSocket已经将tcp、udp的连接异步化处理，所以你只管在主线程调用即可

将AsyncSocket.h AsyncSocket.m 导入到你的工程中，

在自己建立的util中，加入一下代码

#pragma mark tcp
- (void) connectToHost:(NSString*)host port:(int)port {
    socket = [[AsyncSocket alloc] initWithDelegate:self]; //设置回调的delegate
    //TODO 这里需要在退出局域网模式下断开
    [socket disconnect];    //断开tcp连接
//    socket
    NSLog(@"tcp connecting to host:%@,port:%d",host,port);
    @try {
        [socket connectToHost:host onPort:port error:nil];
        [socket readDataWithTimeout:-1 tag:1]; //这只超时，如果timeout为负数，则永远不超时
    }
    @catch (NSException *exception) { //异常处理
        NSLog(@"connect exception %@,%@", [exception name], [exception description]);
    }
}
//相应的回调函数
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{
    NSLog(@"did connect to host %@:%d", host, port);
}
- (void)sendMessage:(NSString*)msg {
    NSLog(@"tcp send msg:%@",  msg);
    [socket readDataWithTimeout:SOCKET_TIMEOUT tag:1];
    [socket writeData:[msg dataUsingEncoding:NSUTF8StringEncoding] withTimeout:SOCKET_TIMEOUT tag:1];
}
- (void)onSocket:(AsyncSocket *)sock didReadData:(NSData *)data withTag:(long)tag{
    NSString* message = [[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]autorelease];
    NSLog(@"%f receive ReadData is: %@",[[NSDate date] timeIntervalSince1970],message);
   
}
-(NSTimeInterval)onSocket:(AsyncSocket *)sock shouldTimeoutReadWithTag:(long)tag elapsed:(NSTimeInterval)elapsed bytesDone:(NSUInteger)length{
    NSLog(@"onSocket:shouldTimeout-ReadWithTag:-----------");
    return 0;
}
-(NSTimeInterval)onSocket:(AsyncSocket *)sock shouldTimeoutWriteWithTag:(long)tag elapsed:(NSTimeInterval)elapsed bytesDone:(NSUInteger)length{
    NSLog(@"onSocket:shouldTimeout-WriteWithTag:-----------");
    return 0;
}

-(void)onSocket:(AsyncSocket *)sock didWriteDataWithTag:(long)tag{
    NSLog(@"didWriteDataWithTag tag:%ld",tag);
}
-(void)onSocketDidDisconnect:(AsyncSocket *)sock{
    NSLog(@"onSocketDidDisconnect sock:%@",sock);
    [viewController onLocalDisconnect:0];
    
}

ok，试试吧