objective c - How to make my Thread waiting until GCDAsyncSocket or AsyncSocket response me? -

when finding tcp/ip communication lib objective-c, people suggested me use gcdasyncsocket. have tired it, can use gcdasyncsocket establish tcp connection, , send packets.

but, project has list of process. have wait connection established, send ip packet 1, read response data, send ip packet 2, read response data...... following code:

    [self establishgcdasyncsockettcpconnection];      if ([self handshake1]) {         nslog(@"handshake 1 done! ");     } else {         nslog(@"handshake 1 fail! *");         return no;     }      if ([self handshake2]) {         nslog(@"handshake 2 done! ");     } else {         nslog(@"handshake 2 fail! *");         return no;     } 

i have wait ip delegate function return me something.

- (void)socket:(gcdasyncsocket *)sock didconnecttohost:(nsstring *)host port:(uint16)port    {     nslog(@"socket:didconnecttohost:%@ port:%d", host, port);      tcpconnectionflag = yes; }   - (void)socket:(gcdasyncsocket *)sock didreaddata:(nsdata *)data withtag:(long)tag {     //return me something.  } 

question:

how make thread waiting gcdasyncsocket response? or there other solution? replace gcdasyncsocket or asyncsocket else?

i found solution. know not enough, way found solve problem:

in .h file.

@interface ipengine : nsobject{     nsoperationqueue *operationqueue; } @property (nonatomic, retain) nsoperationqueue *operationqueue; 

in .m file

-(nsdata *) sendippacket:(nsdata *)data {     switch (protocoltype) {         case tcpcommunication:             [gcdasynctcpsocket writedata:data                              withtimeout:-1.0                                      tag:0];             break;         case udpcommunication:{              [gcdasyncudpsocket senddata:data                                  tohost:ipaddressstring                                    port:[ipportstring integervalue]                             withtimeout:3                                     tag:0];             }             break;          default:             break;     }     [self waitforresponse];     return responsedata; }  -(void) waitforresponse {     self.operationqueue = [nsoperationqueue new];     self.operationqueue.suspended=true; //okay make true     [self.operationqueue addoperationwithblock:^{}];     [self.operationqueue waituntilalloperationsarefinished]; } 

for tcp

#pragma mark gcdasyncsocket delegate tcp - (void)socket:(gcdasyncsocket *)sock didconnecttohost:(nsstring *)host port:(uint16)port {     self.operationqueue.suspended = no; }  - (void)socket:(gcdasyncsocket *)sock didwritedatawithtag:(long)tag {     self.operationqueue.suspended = yes; }  - (void)socket:(gcdasyncsocket *)sock didreaddata:(nsdata *)data withtag:(long)tag {     responsedata = data;     self.operationqueue.suspended = no; }  - (void)socketdiddisconnect:(gcdasyncsocket *)sock witherror:(nserror *)err {     self.operationqueue.suspended = no; } 

for udp

#pragma mark gcdasyncudpsocket delegate udp /**  * called when datagram given tag has been sent.  **/ - (void)udpsocket:(gcdasyncudpsocket *)sock didsenddatawithtag:(long)tag{     self.operationqueue.suspended = yes; }  /**  * called if error occurs while trying send datagram.  * due timeout, or more serious such data being large fit in sigle packet.  **/ - (void)udpsocket:(gcdasyncudpsocket *)sock didnotsenddatawithtag:(long)tag duetoerror:(nserror *)error{     self.operationqueue.suspended = no; }  /**  * called when socket has received requested datagram.  **/ - (void)udpsocket:(gcdasyncudpsocket *)sock    didreceivedata:(nsdata *)data       fromaddress:(nsdata *)address withfiltercontext:(id)filtercontext{     responsedata = data;     self.operationqueue.suspended = no; }  /**  * called when socket closed.  **/ - (void)udpsocketdidclose:(gcdasyncudpsocket *)sock witherror:(nserror *)error{     self.operationqueue.suspended = no;  }