Fired when a connection is closed.
- (void)onDisconnected:(int)statusCode :(NSString*)description;
func onDisconnected(_ statusCode: Int32, _ description: String)
If the connection is broken normally, StatusCode is 0 and Description is "OK".
If the connection is broken for any other reason, StatusCode has the error code returned by the TCP/IP subsystem. Description contains a description of this code. The value of StatusCode is equal to the value of the TCP/IP error.
Please refer to the Error Codes section for more information.