swift - 带有进度条的点对点多点连接。

Question

我已经为此工作了一段时间了! (周)有人可以告诉我在哪里以及如何添加带有标签的进度或事件指示器，该标签显示发送端和接收端对等连接的完成百分比。

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 1

您应该使用已实现的 MCSessionDelegate 函数。

func session(MCSession, didStartReceivingResourceWithName: String, fromPeer: MCPeerID, with: Progress)

您可以使用 Progress 对象来取消传输或了解已取得的进度。

发送数据时，您可以使用用于发送数据的函数的完成处理程序。

func sendResource(at resourceURL: URL, 
     withName resourceName: String, 
       toPeer peerID: MCPeerID, withCompletionHandler completionHandler: ((Error?) -> Void)? = nil) -> Progress?

同样，Progress 对象可用于跟踪进度。

另外，请告诉我您是否尝试过在 iOS 10 上使用 MultipeerConnectivity 以及它是否适合您。上周我一直在尝试，但它没有与同行连接。 (谢谢)

希望这有帮助。

干杯