dscrown dscrown - 1 month ago 17
Swift Question

Multipeer Connectivity peer to peer with Progress bar.

I have worked on this for some time now! (weeks)
Can someone show me where and how to add a Progress or Activity Indicator with a label showing the % complete to a peer to peer connectivity on both the sending and receiving sides.

import UIKit
import MultipeerConnectivity



class ViewController: UIViewController, MCSessionDelegate, MCBrowserViewControllerDelegate, UINavigationControllerDelegate , UIImagePickerControllerDelegate{



//MARK: - Variables
var myDictionary:NSDictionary = [:]

//Variables for Peer to Peer.
var browser : MCBrowserViewController!
var assistant : MCAdvertiserAssistant!
var session : MCSession!
var peerID : MCPeerID!

//Variables for Peer to Peer.
let imagePicker = UIImagePickerController()
var imageDataVar: NSData!



//MARK: - Labels
@IBOutlet weak var firstNameLabel: UILabel!
@IBOutlet weak var lastNameLabel: UILabel!

//MARK: - TextFields
@IBOutlet weak var fistNameTextField: UITextField!
@IBOutlet weak var lastNameTextField: UITextField!

//MARK: - Outlets

@IBOutlet weak var contactImageView: UIImageView!

//MARK: - Buttons
@IBAction func openPortButton(_ sender: AnyObject) {
self.present(self.browser, animated: true, completion: nil)
}

@IBAction func sendButton(_ sender: AnyObject) {
sendInfo()
}

@IBAction func getImage(_ sender: AnyObject) {
chooseImageContact()
}


//MARK: - ViewDidLoad
override func viewDidLoad() {
super.viewDidLoad()
loadPeerToPeer()
}


//MARK: - Functions
func sendInfo() {
if self.session.connectedPeers.count > 0 {
let firstNameVar = fistNameTextField.text!
let lastNameVar = lastNameTextField.text!
myDictionary = ["itemA" : "\(firstNameVar)", "itemB" : "\ (lastNameVar)", "itemC" : imageDataVar]
do {
let data = NSKeyedArchiver.archivedData(withRootObject: myDictionary)
try self.session.send(data, toPeers: self.session.connectedPeers, with: MCSessionSendDataMode.unreliable)
} catch let error as NSError {
let ac = UIAlertController(title: "Send error", message: error.localizedDescription, preferredStyle: .alert)
ac.addAction(UIAlertAction(title: "OK", style: .default, handler: nil))
present(ac, animated: true, completion: nil)
}
}
}


// Called when a peer sends an NSData to us
func session(_ session: MCSession, didReceive data: Data, fromPeer peerID: MCPeerID) {

// This needs to run on the main queue
DispatchQueue.main.async {
self.myDictionary = NSKeyedUnarchiver.unarchiveObject(with: data) as! NSDictionary

self.firstNameLabel.text = self.myDictionary.value(forKey: "itemA") as? String
self.lastNameLabel.text = self.myDictionary.value(forKey: "itemB") as? String
let image = self.myDictionary.value(forKey: "itemC") as? NSData
let newContactImage:UIImage = UIImage(data: image! as Data)!
let smallPicture = self.scaleContactImageWith(newContactImage, newSize: CGSize(width: 100, height: 100))
var sizeOfImage:CGRect = self.contactImageView.frame
sizeOfImage.size = smallPicture.size
self.contactImageView.frame = sizeOfImage
self.contactImageView.image = smallPicture
}
}


func browserViewControllerDidFinish(_ browserViewController: MCBrowserViewController) {
dismiss(animated: true, completion: nil)
}
func browserViewControllerWasCancelled(_ browserViewController: MCBrowserViewController) {
dismiss(animated: true, completion: nil)
}
func browserViewController(_ browserViewController: MCBrowserViewController, shouldPresentNearbyPeer peerID: MCPeerID, withDiscoveryInfo info: [String : String]?) -> Bool {
return true
}

func session(_ session: MCSession, peer peerID: MCPeerID, didChange state: MCSessionState) {
switch state {
case MCSessionState.connected:
print("Connected: \(peerID.displayName)")
case MCSessionState.connecting:
print("Connecting: \(peerID.displayName)")
case MCSessionState.notConnected:
print("Not Connected: \(peerID.displayName)")
}
}

func session(_ session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, with progress: Progress) {
}
func session(_ session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, at localURL: URL, withError error: Error?) {
}
func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID) {
}

func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}



func loadPeerToPeer(){
self.peerID = MCPeerID(displayName: UIDevice.current.name)
self.session = MCSession(peer: peerID, securityIdentity: nil, encryptionPreference: .required)
self.session = MCSession(peer: self.peerID)
self.session.delegate = self
self.assistant = MCAdvertiserAssistant(serviceType:"VBC-ShareCard", discoveryInfo:nil, session:self.session)
self.assistant.start()
self.browser = MCBrowserViewController(serviceType: "VBC- ShareCard", session: self.session)
self.browser.delegate = self
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
}


// Picking the image
func chooseImageContact(){
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary
self.present(imagePicker, animated: true, completion: nil)
}


//Scalling the image
func scaleContactImageWith(_ image:UIImage, newSize:CGSize)->UIImage{
UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
image.draw(in: CGRect(x: 0, y: 0, width: newSize.width, height: newSize.height))
let newContactImage:UIImage = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
return newContactImage
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

//This gets the Contact image inside the imagePickerController
let pickedImage:UIImage = info[UIImagePickerControllerOriginalImage] as! UIImage
let smallPicture = scaleContactImageWith(pickedImage, newSize: CGSize(width: 100, height: 100))
var sizeOfImage:CGRect = contactImageView.frame
sizeOfImage.size = smallPicture.size
contactImageView.frame = sizeOfImage
picker.dismiss(animated: true, completion: nil)
contactImageView.image = smallPicture as UIImage
let test : Data = UIImagePNGRepresentation(smallPicture)!
imageDataVar = test as NSData!
}

}

Answer

My work around.

  //New Variable for spinner.
  var spinnerOnOff = "" 

  //New Function to start, stop, hide and unhide spinner.
  func spin(){
    if spinnerOnOff == "on"{
       activityIndicatorOutlet.isHidden = false
       activityIndicatorOutlet.startAnimating()
    }else{
       activityIndicatorOutlet.isHidden = true
       activityIndicatorOutlet.stopAnimating()
    }
}


//Updated function. (code block will ran "Quickly")
func sendInfo() {
    if self.session.connectedPeers.count > 0 {
        let firstNameVar = fistNameTextField.text!
        let lastNameVar = lastNameTextField.text!
            myDictionary = ["itemA" : "\(firstNameVar)", "itemB" : "\     (lastNameVar)", "itemC" : imageDataVar]
        do {
            let data =  NSKeyedArchiver.archivedData(withRootObject:   myDictionary)
            try self.session.send(data, toPeers:   self.session.connectedPeers, with: MCSessionSendDataMode.unreliable)
        } catch let error as NSError {
            let ac = UIAlertController(title: "Send error", message:        error.localizedDescription, preferredStyle: .alert)
            ac.addAction(UIAlertAction(title: "OK", style: .default,    handler: nil))
            present(ac, animated: true, completion: nil)
        }
    }

    //New. Stop spinner when function Executes.
    spinnerOnOff = "off"  
    spin()

}

//Updated Function.
func session(_ session: MCSession, didReceive data: Data, fromPeer  peerID: MCPeerID)  {

// This needs to run on the main queue
DispatchQueue.main.async {
    self.myDictionary = NSKeyedUnarchiver.unarchiveObject(with: data) as!   NSDictionary

    self.firstNameLabel.text    = self.myDictionary.value(forKey: "itemA") as? String
    self.lastNameLabel.text     = self.myDictionary.value(forKey: "itemB") as? String
    let image                   = self.myDictionary.value(forKey: "itemC") as? NSData
    let newContactImage:UIImage = UIImage(data: image! as Data)!
    let smallPicture            =    self.scaleContactImageWith(newContactImage, newSize: CGSize(width: 100,  height: 100))
    var sizeOfImage:CGRect      = self.contactImageView.frame
        sizeOfImage.size        = smallPicture.size
    self.contactImageView.frame = sizeOfImage
    self.contactImageView.image = smallPicture

    //New. Stop spinner when data is received.
    self.spinnerOnOff = "off"
    self.spin()

}
}
    //Updated Function
    func session(_ session: MCSession, peer peerID: MCPeerID, didChange state: MCSessionState) {

    switch state {
    case MCSessionState.connected:

        //New. Start spinner on connected phone.
        DispatchQueue.main.async {          
        self.spinnerOnOff = "on"
        self.spin()
        }

        print("Connected: \(peerID.displayName)")
    case MCSessionState.connecting:

        //New. Start spinner on sender phone.
        DispatchQueue.main.async {
        self.spinnerOnOff = "on"
        self.spin()
        }

        print("Connecting: \(peerID.displayName)")
    case MCSessionState.notConnected:

        //New. Stop when disconnected.
        DispatchQueue.main.async {
        self.spinnerOnOff = "off"
        self.spin()
        }

        print("Not Connected: \(peerID.displayName)")
    }
}