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I am trying to find a working example of a Socket.io implementation on iOS with Swift, but have been unlucky so far. I did get a few examples from Github, but each have some issues and I cannot tell why they don’t work.
Does anyone know where I can get an out of the box working example, so that I can go through the code and understand the implementation?
436
Based on socket.io's examples:
Server (index.js, see socket.io website for setup):
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(8080, function(){
console.log('listening on *:8080');
});
Client (ViewController.swift):
import UIKit
import Socket_IO_Client_Swift
class ViewController: UIViewController {
@IBOutlet weak var chatView:UITextView!
@IBOutlet weak var sendButton:UIButton!
@IBOutlet weak var sendField:UITextField!
let socket = SocketIOClient(socketURL: "10.0.0.1:8080", opts: ["log": true])
override func viewDidLoad() {
super.viewDidLoad()
addHandlers()
self.socket.connect()
}
@IBAction func send() {
self.socket.emit("chat message", withItems: [self.sendField.text!])
self.sendField.text = ""
}
func addHandlers() {
self.socket.on("connect") {data, ack in
print("socket connected")
}
self.socket.on("chat message") {[weak self] data, ack in
if let value = data.first as? String {
self?.chatView.text?.appendContentsOf(value + "\n")
}
}
}
}
Web client (index.html, useful for testing):
<!doctype html>
<html>
<head>
<title>Socket.IO chat</title>
<style>
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font: 13px Helvetica, Arial; }
form { background: #000; padding: 3px; position: fixed; bottom: 0; width: 100%; }
form input { border: 0; padding: 10px; width: 90%; margin-right: .5%; }
form button { width: 9%; background: rgb(130, 224, 255); border: none; padding: 10px; }
#messages { list-style-type: none; margin: 0; padding: 0; }
#messages li { padding: 5px 10px; }
#messages li:nth-child(odd) { background: #eee; }
</style>
</head>
<body>
<ul id="messages"></ul>
<form action="">
<input id="m" autocomplete="off" /><button>Send</button>
</form>
<script src="https://cdn.socket.io/socket.io-1.2.0.js"></script>
<script src="http://code.jquery.com/jquery-1.11.1.js"></script>
<script>
var socket = io();
$('form').submit(function(){
socket.emit('chat message', $('#m').val());
$('#m').val('');
return false;
});
socket.on('chat message', function(msg){
$('#messages').append($('<li>').text(msg));
});
</script>
</body>
</html>
Since I asked the question there have been changes and we now have socket.io for iOS. Here's the original blog post on it: http://socket.io/blog/socket-io-on-ios/
26
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