ios - 另一个点接收到的 PeerID 对象与 MultipeerConnectivity Framework 中的原始对象不同

Question

我正在使用 Multipeer Connectivity 框架。我将我的 PeerId 保存在 NSUserDefaults 中以像这样重用它(按照 Apple 的建议)(以下代码是快速的，但 Objective c 也具有相同的行为)。 :

        var peerId: MCPeerID = {
        let defaults = NSUserDefaults.standardUserDefaults();
        let dataToShow = defaults.dataForKey("kPeerID");
        var peer = NSKeyedUnarchiver.unarchiveObjectWithData(dataToShow) as? MCPeerID;
        if peer == nil {
            peer = MCPeerID(displayName: UIDevice.currentDevice().name);
            let data: NSData = NSKeyedArchiver.archivedDataWithRootObject(peer);
            defaults.setObject(data, forKey: "kPeerID");
            defaults.synchronize();
        }
        println("I am peer: \(peer!)");
        return peer!;
    }()

我像这样向发现的对等方发送邀请:

func browser(browser: MCNearbyServiceBrowser!, foundPeer peerID: MCPeerID!, withDiscoveryInfo info: [NSObject : AnyObject]!) {    
    println("\(self.peerId) Found peer \(peerID)");
    if let browserSession = self.session {
        browserSession.delegate = self;
        browser.invitePeer(peerID, toSession: browserSession, withContext: nil, timeout: 30);
    }else {
        println("Browser session is nil");
   }    
}

广告商使用代码找到它:

func advertiser(advertiser: MCNearbyServiceAdvertiser!, didReceiveInvitationFromPeer peerID: MCPeerID!, withContext context: NSData!, invitationHandler: ((Bool, MCSession!) -> Void)!) {
    println("\(self.peerId) Received Invitation from \(peerID)");
    var session = availableSession();
    invitationHandler(true, session);
}

我面临的问题是:当广告商找到 peerId 时，它显示的 peerId 与原始 peerId 不同，但具有正确的显示名称。

浏览器控制台输出为:

  I am peer: <MCPeerID: 0x1663e670 DisplayName = Jon Yang’s iPad>
  <MCPeerID: 0x1663e670 DisplayName = Jon Yang’s iPad> Received Invitation from <MCPeerID: 0x1666daf0 DisplayName = Jon Yang’s iPadMini>
  <MCPeerID: 0x1663e670 DisplayName = Jon Yang’s iPad> Connecting with <MCPeerID: 0x1666daf0 DisplayName = Jon Yang’s iPadMini>
  <MCPeerID: 0x1663e670 DisplayName = Jon Yang’s iPad> Connected with <MCPeerID: 0x1666daf0 DisplayName = Jon Yang’s iPadMini>

广告商控制台输出为:

 I am peer: <MCPeerID: 0x1569d230 DisplayName = Jon Yang’s iPadMini>
 <MCPeerID: 0x1569d230 DisplayName = Jon Yang’s iPadMini> Found peer <MCPeerID: 0x15586600 DisplayName = Jon Yang’s iPad>
 <MCPeerID: 0x1569d230 DisplayName = Jon Yang’s iPadMini> Connecting with <MCPeerID: 0x15586600 DisplayName = Jon Yang’s iPad>
 <MCPeerID: 0x1569d230 DisplayName = Jon Yang’s iPadMini> Connected with <MCPeerID: 0x15586600 DisplayName = Jon Yang’s iPad>

正如你所看到的，即使 Browser 和 Advertiser 有它们的 peerId 信息，当它们被其他 peer 接收时，它们的 peerId 是不同的。谁能解释一下？我做错了什么吗？

Answer 1

 <MCPeerID: 0x1663e670 DisplayName = Jon Yang’s iPad>

0x1663e670表示MCPeerID对象在当前设备上的内存地址。不要将它与框架引用的实际 MCPeerID 对象混淆。只要 displayName 符合预期，那么它就是正确的对等点。