Using self in a Swift closure with SIOSocket - objective-c

Question

I am hoping someone can help me. I trying to use SIOSocket with a Swift project.
I am using the example at https://github.com/MegaBits/SIOSocket/issues/30 which seems to work, but i want to be able to declare a socket as a var like the Objective-C project example at https://github.com/MegaBits/WorldPin. so i can use it in else where in the code to call emit.
I assume i am not understanding the Obj-C block and Swift closure fundamentals and the use of self or the need to declare the var as block but can’t seem to wrap my head around it. Any help will be much appreciated.
SIOSocket is on Github
Objective-C code:
#property SIOSocket *socket;
[SIOSocket socketWithHost: #"http://localhost:3000" response: ^(SIOSocket *socket)
{
self.socket = socket; //I Want to do this in swift
__weak typeof(self) weakSelf = self;
self.socket.onConnect = ^()
{
weakSelf.socketIsConnected = YES;
[weakSelf mapView: weakSelf.mapView didUpdateUserLocation: weakSelf.mapView.userLocation];
};
[self.socket on: #"join" callback: ^(SIOParameterArray *args)
{
[weakSelf mapView: weakSelf.mapView didUpdateUserLocation: weakSelf.mapView.userLocation];
}];
[self.socket on: #"update" callback: ^(SIOParameterArray *args)
{
NSString *pinData = [args firstObject];
etc etc …
Swift Code:
private func connectToHost() {
SIOSocket.socketWithHost(host, reconnectAutomatically: true, attemptLimit: 0, withDelay: 1, maximumDelay: 5, timeout: 20, response: {
socket in
self.socket = socket // This gives me a use of unresolved identifier self error
socket.onConnect = {
println("Connected to \(host)")
socket.emit("add user", args: [username])
}
socket.on("login", callback: {(AnyObject data) -> Void in
println(["login": data])
socket.emit("new message", args: [message])
})
socket.onDisconnect = {
println("Disconnected from \(host)")
}
})
}

Answer 1

Your code should work, make sure you have all the right types and optional types, make sure socket is a read-write variable by defining it with var and not with let.
Try defining the closure before the method call by using let response: (SIOSocket) -> Void = {...}.

Answer 2

Try changing it to this:
SIOSocket.socketWithHost(host, reconnectAutomatically: true, attemptLimit: 0, withDelay: 1, maximumDelay: 5, timeout: 20, response: {(socket: SIOSocket) in
self.socket = socket // This gives me a use of unresolved identifier self error
//...
})
I changed socket in to (socket: SIOSocket) in