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在Xcode上使用iOS的多点连接技术

iosiphoneswiftxcodemultipeer-connectivity
5

同时进行设备广播和浏览。 问题出现在尝试建立连接时。

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

当尝试连接时，工作一会儿后几秒钟又再次呼叫，MCSessionState == .notConnected。

已经尝试使用WiFi、蓝牙和它们之间的每种组合...

刚刚添加：

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

并没有帮助太多... 仍然在控制台中出现（只是在iOS 10.2设备上...）：

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)

(广告主是这个应用程序的名称) 使用10.2版本的iPhone 6S和9.2版本的iPhone 6。 在macOS Sierra v10.12.2上从Xcode 8.2.1（Swift3）运行代码。

3个回答
4

我有同样的问题，但是我找到了解决方法。它仍然会显示一些错误，但对我有效。

尝试按照以下方式初始化MCSession：

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

然后按照以下方式实现MCSession的证书处理委托方法：
func session(_ session: MCSession, didReceiveCertificate certificate: [Any]?, fromPeer peerID: MCPeerID, certificateHandler: @escaping (Bool) -> Void) {
    certificateHandler(true)
}
是的，这对我也起作用了。谢谢你。 - yuchen
3

您是否在广告商和浏览器两端都保留了 MCSession 对象的引用？如果正在使用的 MCSession 对象被释放，就会出现这些“BINDING_REQUEST”失败的消息。

1

如果两个设备在建立连接后继续广告和浏览，它们可能会在重新发现彼此时断开连接。在建立连接后立即通过调用以下方法关闭浏览：

MCNearbyServiceBrowser.stopBrowsingForPeers()

如果设备继续广告，其他设备仍然可以连接到它们。
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