socket.on method not calling during getting message from server - ios

Question

I am working on socket programming and I am new to socket. I got stuck. I am able to send the message on server easily but not able to get the message from the server. This could mean that my socket.on() method not working.
My socket connection code is
-(void)socketSession
{
NSString *strURl = [NSString stringWithFormat:URl];
NSURL* url = [[NSURL alloc] initWithString:strURl];
socket = [[SocketIOClient alloc] initWithSocketURL:url options:#{#"log": #YES, #"forcePolling": #YES}];
[socket connect];
[self recieveServerMessage];
[socket on:#"connect" callback:^(NSArray* data, SocketAckEmitter* ack) {
NSLog(#"socket connected");
}];
}
I call this method on viewDidLoad in viewController class and recieveServermessage method is
-(void)recieveServerMessage{
NSLog(#"receiving...message...");
[socket on:#"chat" callback:^(NSArray* data, SocketAckEmitter* ack) {
NSLog(#"recieveMessage");
}];
}
My control don't come when message is sent by server.
and below format is given by web server client
socket.on(":chat", function(data) {
// fired when any chat message is raised
// data.to_id = my _id. Please verify this before processing the packet
// data.sender_id = sender's _id. Map against counsellor list API or /api/getUserName?_id=(user's _id)
// data.msg = text message sent by the sender
})
Now please guide me. I have been stuck on this the last two days.
Thanks

Answer 1

Full code of socket io javascript class will be helpful.
You need to write emit function to send message from server to client. Like:
sockets.emit('chat', message);
And from client to server:
[socket emit:#"chat" withItems:#[#"message", #"other data"]];

Answer 2

I found my solution.Main problem was in socket handshake. Now I am using
NSURL* url = [[NSURL alloc] initWithString:#"https://unbottle.me"];
socket = [[SocketIOClient alloc] initWithSocketURL:url
options:#{#"connectParams" : #{#"_id": userID,#"isCounsellor": #NO,#"counsellor_id": counsellorID}}];
Earlier I was not using #"connectParams" key value in dictionary so I was facing this issue.
Thanks