Question

两种设备广告和浏览。尝试建立连接时会出现此问题。

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

尝试连接时是否正常工作，但几秒后，它再次使用MCSessionState == .notConnected进行呼叫。

尝试使用WiFi，BT以及它们之间的所有组合......

刚补充说：

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
    <key>NSTemporaryExceptionRequiresForwardSecrecy</key>
    <false/>
</dict>

没多大帮助......仍然进入控制台（仅在iOS 10.2设备上，但是......）：

2017-02-06 15:17:37.858063 Advertiser[1149:316236] [ViceroyTrace] [ICE][ERROR] ICEStopConnectivityCheck() found no ICE check with call id (1724768204)
2017-02-06 15:17:39.727633 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:39.808822 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:39.948454 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:40.179569 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:40.591829 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:41.297454 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:42.547840 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:44.077537 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:45.601568 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:47.125030 Advertiser[1149:316295] [ViceroyTrace] [ICE][ERROR]  Send BINDING_REQUEST failed(C01A0041).
2017-02-06 15:17:48.110301 Advertiser[1149:316267] [GCKSession] Not in connected state, so giving up for participant [66CDDFCC] on channel [0].
2017-02-06 15:17:48.111331 Advertiser[1149:316267] [GCKSession] Not in connected state, so giving up for participant [66CDDFCC] on channel [1].
2017-02-06 15:17:48.111526 Advertiser[1149:316267] [ViceroyTrace] [ICE][ERROR] ICEStopConnectivityCheck() found no ICE check with call id (1724768204)
2017-02-06 15:17:48.111705 Advertiser[1149:316267] [GCKSession] Not in connected state, so giving up for participant [66CDDFCC] on channel [2].
2017-02-06 15:17:48.111873 Advertiser[1149:316267] [ViceroyTrace] [ICE][ERROR] ICEStopConnectivityCheck() found no ICE check with call id (1724768204)
2017-02-06 15:17:48.112042 Advertiser[1149:316267] [GCKSession] Not in connected state, so giving up for participant [66CDDFCC] on channel [3].
2017-02-06 15:17:48.113031 Advertiser[1149:316267] [ViceroyTrace] [ICE][ERROR] ICEStopConnectivityCheck() found no ICE check with call id (1724768204)
2017-02-06 15:17:48.121016 Advertiser[1149:316267] [GCKSession] Not in connected state, so giving up for participant [66CDDFCC] on channel [4].
2017-02-06 15:17:48.121321 Advertiser[1149:316267] [ViceroyTrace] [ICE][ERROR] ICEStopConnectivityCheck() found no ICE check with call id (1724768204)
2017-02-06 15:17:48.121506 Advertiser[1149:316267] [GCKSession] Not in connected state, so giving up for participant [66CDDFCC] on channel [5].
2017-02-06 15:17:48.121683 Advertiser[1149:316267] [ViceroyTrace] [ICE][ERROR] ICEStopConnectivityCheck() found no ICE check with call id (1724768204)

（广告客户是应用的名称）使用iPhone 6S和10.2＆amp; iPhone 6配9.2。使用来自Xcode 8.2.1（Swift3）的macOS Sierra v10.12.2在Macbook Pro上运行代码。

Answer 1

您是否为广告客户和浏览器保留了对MCSession对象的引用？如果正在使用的MCSession对象被解除分配，则会发生BINDING_REQUEST个失败的消息。

Answer 2

我有同样的问题，我找到了解决方案。它仍然显示一些错误，但它适用于我。

尝试按如下方式初始化MCSession：

let mcSession = MCSession(peer: self.mcPeerId, securityIdentity: nil, encryptionPreference: .none)

然后实现MCSession的证书处理程序委托方法，如下所示：

func session(_ session: MCSession, didReceiveCertificate certificate: [Any]?, fromPeer peerID: MCPeerID, certificateHandler: @escaping (Bool) -> Void) {
    certificateHandler(true)
}

Answer 3

如果两个设备在建立连接后继续进行广告和浏览，则当他们重新发现彼此时可能会断开连接。建立连接后，通过调用以下方式关闭浏览：

MCNearbyServiceBrowser.stopBrowsingForPeers()

如果设备继续做广告，其他设备仍然可以连接到它们。

使用Xcode在iOS上实现多重连接

3 个答案: