文档介绍：--------------------------校验:_____________-----------------------日期:(CFAllocatorRefallocator,SInt32protocolFamily,SInt32socketType,SInt32protocol,CFOptionFlagscallBackTypes,CFSocketCallBackcallout,constCFSocketContext*context);-(void)setTextInMainThread:(NSString*)text{NSRangeendRange;length];length];stringByAppendingString:[@"server:"stringByAppendingString:text]];;scrollRangeToVisible:endRange];}-(void)readStream{charbuffer[255];NSAutoreleasePool*pool=[[NSAutoreleasePoolalloc]init];while(recv(CFSocketGetNative(_socket),buffer,sizeof(buffer),0)){NSString*s=[NSStringstringWithUTF8String:buffer];[selfperformSelectorOnMainThread:***@selector(setTextInMainThread:)withObject:swaitUntilDone:YES];}[poolrelease];}staticvoidTCPServerConnectCallBack(CFSocketRefsocket,CFSocketCallBackTypetype,CFDataRefaddress,constvoid*data,void*info){if(data!=NULL){UIAlertView*alert=[[UIAlertViewalloc]initWithTitle:@""message:@"连接失败"delegate:nilcancelButtonTitle:@"关闭"otherButtonTitles:nil];[alertshow];[alertrelease];return;}TCPClientDemoAppDelegate*delegate=(TCPClientDemoAppDelegate*)info;[delegateperformSelectorInBackground:***@selector(readStream)withObject:nil];dismissModalViewControllerAnimated:YES];[[NSNotificationCenterdefaultCenter]selector:***@selector(keyboardWillShown:)name:UIKeyboardWillShowNotificationobject:nil];[[NSNotificationCenterdefaultCenter]selector:***@selector(keyboardWillHidden:)name:UIKeyboardWillHideNotificationobject:nil];}-(void)doConnect{//CFSocketContext存放一些CFSocketRef的相关信息CFSocketContextCTX={0,self,NULL,NULL,NULL};//CFSocketCreate函数是用来创建一个CFSocketRef,第一个参数是表示由系统默认的allocator来为CFSocketRef分配一个内存空间。//第二个参数表示profocolFamily(协议簇)//第五个参数表示当socket的某个类型activity时,调用第六个参数的函数//第六个参数表示当socket发生第五个参数的类型的动作时,调用的函数//第七个参数表示一个保存CFSocketobject对象的一些相关信息_socket=CFSocketCreate(kCFAllocatorDefault,,SOCK_STREAM,IPPROTO_TCP,kCFSocketConnectCallBack,TCPServerConnectCall