Swift2.0 Multipeer Connectivity 无法连接

Posted 2023-03-11

【中文标题】Swift2.0 Multipeer Connectivity 无法连接

【英文标题】：Swift2.0 Multipeer Connectivity Cannot Connect

【发布时间】：2016-03-27 10:30:16

【问题描述】：

我有一个问题，我制作了一个小型 Multipeer Connectivity 应用 a tutorial 我稍微重写了代码，以便它可以与 swift 2.0 一起使用。 一切正常，但如果我从 iPhone 6s 向我的模拟发送邀请，它不会连接，为什么？

代码：

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) 

【问题讨论】：

multipeer connectivity test on iphone and a simulator simultaneously的可能重复

【参考方案1】：

multiplier 可以通过 蓝牙/wifi 连接。如果您有相同的 wifi 网络两个设备（iPhone 和模拟器）。它可以连接。

但如果您在两个设备中都没有 wifi。 multiplier 将尝试通过蓝牙建立连接。由于模拟器不不支持蓝牙，所以这种情况下 multiplier 连接可能失败

【参考方案2】：

让我稍微改一下 Jamil 的回应……如果 iPhone 开启了蓝牙，它将使用蓝牙而不是 WiFi。由于模拟器不支持蓝牙，所以无法连接。尝试在关闭蓝牙的情况下连接。