我有一个问题，我用a tutorial做了一个小的多点连接应用程序，我重写了一点代码，所以它可以与swift 2.0一起工作。一切都很好，但是如果我从我的iPhone 6s发送一个邀请，它为什么不连接？
编码：

import MultipeerConnectivity
import UIKit

class ViewController: UIViewController, MCSessionDelegate, MCBrowserViewControllerDelegate {

var browser : MCBrowserViewController!
var assistant : MCAdvertiserAssistant!
var session : MCSession!
var peerID: MCPeerID!

@IBOutlet var chatView: UITextView!
@IBOutlet var messageField: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()
    self.peerID = MCPeerID(displayName: UIDevice.currentDevice().name)
    print( UIDevice.currentDevice().name )
    //self.session = MCSession(peer: peerID, securityIdentity: nil, encryptionPreference: .Required)
    self.session = MCSession(peer: self.peerID)
    self.session.delegate = self

    // create the browser viewcontroller with a unique service name
    self.browser = MCBrowserViewController(serviceType: "LCOC-Chat", session: self.session)
    self.browser.delegate = self

    // tell the assistant to start advertising our fabulous chat
    self.assistant = MCAdvertiserAssistant(serviceType:"LCOC-Chat", discoveryInfo:nil, session:self.session)
    self.assistant.start()

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func showBrowser(sender: UIButton) {
    self.presentViewController(self.browser, animated: true, completion: nil)
}

@IBAction func sendChat(sender: UIButton) {
    if self.session.connectedPeers.count > 0 {
        if let msg = self.messageField.text!.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false) {
            // 3
            do {
                try self.session.sendData(msg, toPeers: self.session.connectedPeers, withMode: 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))
                presentViewController(ac, animated: true, completion: nil)
            }
        }
    }
    //-----------------this might ne3ed to be UNCOMMENTED!!!
    //self.updateChat(self.messageField.text!, fromPeer: self.peerID)
    self.messageField.text = ""
}

func updateChat(text : String, fromPeer peerID: MCPeerID) {
    // Appends some text to the chat view
    print("Incoming msg: \(text)")
    // If this peer ID is the local device's peer ID, then show the name
    // as "Me"
    var name : String
    switch peerID {
    case self.peerID:
        name = "Me"
    default:
        name = peerID.displayName
    }
    // Add the name to the message and display it
    let message = "\(name): \(text)\n"
    self.chatView.text = self.chatView.text + message
}

func browserViewControllerDidFinish(browserViewController: MCBrowserViewController) {
    dismissViewControllerAnimated(true, completion: nil)
}
func browserViewControllerWasCancelled(browserViewController: MCBrowserViewController) {
    dismissViewControllerAnimated(true, completion: nil)
}
func browserViewController(browserViewController: MCBrowserViewController, shouldPresentNearbyPeer peerID: MCPeerID, withDiscoveryInfo info: [String : String]?) -> Bool {
    return true
}
//---------------------------------------Session
func session(session: MCSession, didReceiveData data: NSData, fromPeer peerID: MCPeerID) {
    // Called when a peer sends an NSData to us

    // This needs to run on the main queue
    dispatch_async(dispatch_get_main_queue()) {
        print("Incoming data:::")
        //let msg = NSString(data: data, encoding: NSUTF8StringEncoding)
        let msg = String(data: data, encoding: NSUTF8StringEncoding)!

        self.updateChat(msg, fromPeer: peerID)
    }
}
func session(session: MCSession, peer peerID: MCPeerID, didChangeState 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)")
    }
}
// The following methods do nothing, but the MCSessionDelegate protocol
// requires that we implement them.
func session(session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, withProgress progress: NSProgress) {
}
func session(session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, atURL localURL: NSURL, withError error: NSError?) {

}
func session(session: MCSession, didReceiveStream stream: NSInputStream, withName streamName: String, fromPeer peerID: MCPeerID) {

}

}