demo-xmpp-ios

Overview

XMPPFramework Basic client relying using Cocoapods package.

I. Project setup

1. Open Xcode and select Create a new project
   

2. Select Single View Application in the project editor
   

3. Fill all the required fields and then project location
   

4. Now quit Xcode, and open the terminal app
   

5. Navigate to your project directory and type pod init like so:
   

6. Edit the newly created Podfile by taping emacs Podfile (Feel free to use vim :)). It should look like this:
   
   Press ctrl+x, ctrl+s to save, then ctrl+x, ctrl+c to end editing

7. Now Type pod install and wait for cocoapod to finish
   
   From now on you will have to open the xcworkspace file

8. Open your AppDelegate.h and add the XMPP import:

   	import XMPPFramework

Finito ! Build & run to confirm everyting is setup properly before going further

II.XMPP Demo

1. Add the chat protocol at the top of your AppDelegate:

   	protocol ChatDelegate {
   		func buddyWentOnline(name: String)
   		func buddyWentOffline(name: String)
   		func didDisconnect()
   	}

2. Add the following degegates:

   	XMPPRosterDelegate, XMPPStreamDelegate

3. Add XMPP properties:

   	var delegate:ChatDelegate! = nil
   	let xmppStream = XMPPStream()
   	let xmppRosterStorage = XMPPRosterCoreDataStorage()
   	var xmppRoster: XMPPRoster
   
   	override init() {
   		xmppRoster = XMPPRoster(rosterStorage: xmppRosterStorage)
   	}

4. Still in AppDelegate, add a new method called setupStream, witch will be in charge of configuring the stream, roster and its storage:

   	private func setupStream() {
   		xmppRoster.activate(xmppStream)
   		xmppStream.addDelegate(self, delegateQueue: dispatch_get_main_queue())
   		xmppRoster.addDelegate(self, delegateQueue: dispatch_get_main_queue())
   	}

   And call it in

   	func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool

5. Implement the following methods:

   	private func goOnline() {
   		let presence = XMPPPresence()
   		let domain = xmppStream.myJID.domain
   
   		if domain == "gmail.com" || domain == "gtalk.com" || domain == "talk.google.com" {
   			let priority = DDXMLElement.elementWithName("priority", stringValue: "24") as! DDXMLElement
   			presence.addChild(priority)
   		}
   		xmppStream.sendElement(presence)
   	}
   
   	private func goOffline() {
   		let presence = XMPPPresence(type: "unavailable")
   		xmppStream.sendElement(presence)
   	}
   
   	func connect() -> Bool {
   		if !xmppStream.isConnected() {
   			let jabberID = NSUserDefaults.standardUserDefaults().stringForKey("userID")
   			let myPassword = NSUserDefaults.standardUserDefaults().stringForKey("userPassword")
   
   			if !xmppStream.isDisconnected() {
   				return true
   			}
   			if jabberID == nil && myPassword == nil {
   				return false
   			}
   
   			xmppStream.myJID = XMPPJID.jidWithString(jabberID)
   
   			do {
   				try xmppStream.connectWithTimeout(XMPPStreamTimeoutNone)
   					print("Connection success")
   					return true
   				} catch {
   					print("Something went wrong!")
   					return false
   				}
   			} else {
   				return true
   			}
   	}
   
   	func disconnect() {
   		goOffline()
   		xmppStream.disconnect()
   	}

6. Call connect() in func applicationDidBecomeActive(application: UIApplication) and disconnect() in func applicationWillResignActive(application: UIApplication)

7. Now the last but not the least, implement the xmpp delegates:

   	func xmppStreamDidConnect(sender: XMPPStream!) {
   		do {
   			try	xmppStream.authenticateWithPassword(NSUserDefaults.standardUserDefaults().stringForKey("userPassword"))
   		} catch {
   			print("Could not authenticate")
   		}
   	}
   
   	func xmppStreamDidAuthenticate(sender: XMPPStream!) {
   		goOnline()
   	}
   
   	func xmppStream(sender: XMPPStream!, didReceiveIQ iq: XMPPIQ!) -> Bool {
   		print("Did receive IQ")
   		return false
   	}
   
   	func xmppStream(sender: XMPPStream!, didReceiveMessage message: XMPPMessage!) {
   		print("Did receive message \(message)")
   	}
   
   	func xmppStream(sender: XMPPStream!, didSendMessage message: XMPPMessage!) {
   		print("Did send message \(message)")
   	}
   
   	func xmppStream(sender: XMPPStream!, didReceivePresence presence: XMPPPresence!) {
   		let presenceType = presence.type()
   		let myUsername = sender.myJID.user
   		let presenceFromUser = presence.from().user
   
   		if presenceFromUser != myUsername {
   			print("Did receive presence from \(presenceFromUser)")
   			if presenceType == "available" {
   				delegate.buddyWentOnline("\(presenceFromUser)@gmail.com")
   			} else if presenceType == "unavailable" {
   				delegate.buddyWentOffline("\(presenceFromUser)@gmail.com")
   			}
   		}
   	}
   
   	func xmppRoster(sender: XMPPRoster!, didReceiveRosterItem item: DDXMLElement!) {
   		print("Did receive Roster item")
   	}

8. Let's add a LoginViewController, you are free to add whatever you want in this ViewController, but your login method should look like this:

   	@IBAction func login(sender: AnyObject) {
   		NSUserDefaults.standardUserDefaults().setObject(loginTextField.text!, forKey: "userID")
   		NSUserDefaults.standardUserDefaults().setObject(passwordTextField.text!, forKey: "userPassword")
   
   		let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
   
   		if appDelegate.connect() {
   			dismissViewControllerAnimated(true, completion: nil)
   		}
   	}

9. It's nice to be connected, but it'll be even better if we could get our buddies list. Create a UITableViewController subclass and add Chatdelegate and an ivar var onlineBuddies = NSMutableArray() to store the buddy list

10. Now set yourself as delegate for chat, then init your array in viewDidLoad:

    	let appDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
    
    	override func viewDidLoad() {
    		super.viewDidLoad()
    		// Do any additional setup after loading the view, typically from a nib.
    		appDelegate.delegate = self
    	}

11. Then in your viewwillappear, check if you are connected like so:

    	override func viewDidAppear(animated: Bool) {
    		if (NSUserDefaults.standardUserDefaults().objectForKey("userID") != nil) {
    			if appDelegate.connect() {
    				self.title = appDelegate.xmppStream.myJID.bare()
    				appDelegate.xmppRoster.fetchRoster()
    			}
    		} else {
    			performSegueWithIdentifier("Home.To.Login", sender: self)
    		}
    	}

12. After that implement the chat delegates methods:

    	func buddyWentOnline(name: String) {
    		if !onlineBuddies.containsObject(name) {
    			onlineBuddies.addObject(name)
    			tableView.reloadData()
    		}
    	}
    
    	func buddyWentOffline(name: String) {
    		onlineBuddies.removeObject(name)
    		tableView.reloadData()
    	}
    
    	func didDisconnect() {
    		onlineBuddies.removeAllObjects()
    		tableView.reloadData()
    	}

13. The rest is pretty straightforward, you need to implement the UITableView’s Delegates:

    	override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    		let cell = tableView.dequeueReusableCellWithIdentifier("CellIdentifier", forIndexPath: indexPath)
    
    		cell.textLabel?.text = onlineBuddies[indexPath.row] as? String
    
    		return cell
    	}
    
    	override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    		return onlineBuddies.count
    	}
    
    	override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    		return 1
    	}

14. Now if you want to send a message when the user tap on a row, implement this method:

    	override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
    
    		let alertController = UIAlertController(title: "Warning!", message: "It will send Yo! to the recipient, continue ?", preferredStyle: UIAlertControllerStyle.Alert)
    			alertController.addAction(UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: { (action) -> Void in
    			alertController.dismissViewControllerAnimated(true, completion: nil)
    		}))
    
    		alertController.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: { (action) -> Void in
    			let message = "Yo!"
    			let senderJID = XMPPJID.jidWithString(self.onlineBuddies[indexPath.row] as? String)
    			let msg = XMPPMessage(type: "chat", to: senderJID)
    
    			msg.addBody(message)
    			self.appDelegate.xmppStream.sendElement(msg)
    		}))
    		presentViewController(alertController, animated: true, completion: nil)
    	}

15. Build, run and start chatting with your friends !

You can also download the sample project here