MultipeerConnectivity 拒绝连接答案

【问题标题】：MultipeerConnectivity declining connectionMultipeerConnectivity 拒绝连接
【发布时间】：2020-05-07 23:04:03
【问题描述】：

我正在尝试在两台设备之间建立蓝牙连接，这是我的代码：

var peerID: MCPeerID!
var mcSession: MCSession!
var mcAdvertiserAssistant: MCAdvertiserAssistant!

@IBAction func connectBlueTooth(_ sender: Any) {
    let actionSheet = UIAlertController(title: "משחק רשת", message: "מעוניין ליצור משחק חדש או להצטרף למשחק קיים?", preferredStyle: .actionSheet)

    actionSheet.addAction(UIAlertAction(title: "יצירת משחק חדש", style: .default, handler: {
        (action: UIAlertAction) in
        self.startHosting()
    }))

    actionSheet.addAction(UIAlertAction(title: "חיפוש משחק קיים", style: .default, handler: {
        (action: UIAlertAction) in
        self.joinSession()
    }))

    actionSheet.addAction(UIAlertAction(title: "ביטול", style: .default, handler: nil))

    if let popoverController = actionSheet.popoverPresentationController {
        popoverController.sourceView = self.view
        let constraintValue = AppConfigurator.getConstraintByDevice()

        popoverController.sourceRect = CGRect(x: self.view.bounds.maxX - constraintValue, y: self.view.bounds.maxY - (3.5 * constraintValue), width: 0, height: 0)
        popoverController.permittedArrowDirections = []
    }

    self.present(actionSheet, animated: true, completion: nil)
}

还有扩展：

extension MainMenuVC: MCBrowserViewControllerDelegate {
    func browserViewControllerDidFinish(_ browserViewController: MCBrowserViewController) {
        dismiss(animated: true, completion: nil)
    }

    func browserViewControllerWasCancelled(_ browserViewController: MCBrowserViewController) {
        dismiss(animated: true, completion: nil)
    }
}

extension MainMenuVC: MCSessionDelegate {
        func startHosting() {
            mcAdvertiserAssistant = MCAdvertiserAssistant(serviceType: "CatchTheDragon", discoveryInfo: nil, session: mcSession)
            mcAdvertiserAssistant.start()
        }

        func joinSession() {
            let mcBrowser = MCBrowserViewController(serviceType: "CatchTheDragon", session: mcSession)
            mcBrowser.delegate = self
            present(mcBrowser, animated: true)
        }

        func session(_ session: MCSession, peer peerID: MCPeerID, didChange 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)")
            }
        }

        func session(_ session: MCSession, didReceive data: Data, fromPeer peerID: MCPeerID) {
            let userInfo = ["data" : data, "peerID": peerID] as [String : Any]
            DispatchQueue.main.async {
                NotificationCenter.default.post(name: NSNotification.Name(rawValue: "WPC_DidReceiveDataNotification"), object: nil, userInfo: userInfo)
            }
        }

        func session(_ session: MCSession, didReceive stream: InputStream, withName streamName: String, fromPeer peerID: MCPeerID) {}

        func session(_ session: MCSession, didStartReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, with progress: Progress) {}

        func session(_ session: MCSession, didFinishReceivingResourceWithName resourceName: String, fromPeer peerID: MCPeerID, at localURL: URL?, withError error: Error?) {}   
}

由于某种原因，设备卡在“正在连接”状态，最终解决为“拒绝”状态。我不喜欢使用MCNearbyServiceAdvertiserDelegate 和MCNearbyServiceBrowser。我在这里错过了什么？

【问题讨论】：

标签： ios swift5 multipeer-connectivity ios-bluetooth mcsession

【解决方案1】：

我遇到了同样的问题，但我找到了以下文章并进行了修复："Multipeer Сonnectivity Framework in Swift: tutorial"

无法通过其他设备获得加入会话的提醒？

嗯，这是 XCode 11.2 和 iOS 13 中出现并且仍然存在的常见问题。我们不知道 Apple 是否发现该框架已过时或稍后会修复它。其中一种解决方案可能是 - 从使用 SceneDelegate 和 AppDelegate 降级为仅一个类：AppDelegate 并为未来的应用使用 UIScene ，而不是这一类。

首先，从 Info.plist 中彻底删除“Application Scene Manifest”条目；

移除 SceneDelegate 类，并移除 AppDelegate 中所有与场景相关的方法；

如果缺少，添加属性 var window: UIWindow?到您的 AppDelegate 类。

您的应用现在应该只使用应用委托，并且在 iOS 13 下，它将具有与 iOS 12 相同的生命周期。多点连接应该按照最初的设计工作。

【讨论】：