swift - xcode 8 swift 3 中的多点连接框架中对成员 'session(_:peer:didChange)' 错误的不明确引用

Question

我一直在研究多点连接框架。在初始化 session 对象时，我收到一条错误，指出“对成员'session(_:peer:didChange)'的引用不明确”。在将类创建为同一 session 对象的委托(delegate)。这是代码实现。任何建议都会有帮助，因为我是这个框架的新手。提前致谢:)

#

import UIKit

import MultipeerConnectivity

var session : MCSession!

var peer : MCPeerID!

var browser : MCNearbyServiceBrowser!

var advertiser : MCNearbyServiceAdvertiser!


var foundPeers = [MCPeerID]()

var invitationHandler : ((Bool, MCSession?)->Void)!


class MCPManager: NSObject,MCSessionDelegate
{

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

    public func session(_ session: MCSession, didReceive data: Data, fromPeer peerID: MCPeerID)
    {
        return
    }


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

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

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

    override init()
    {
        super.init()

        peer = MCPeerID(displayName: UIDevice.current.name)

        session = MCSession(peer: peer) // Ambiguous reference to member 'session(_:peer:didChange)' 

        session.delegate = self  //Ambiguous reference to member 'session(_:peer:didChange)' 
    }  
}

Answer 1

当您在 MCPManager 中说 session 时，编译器会尝试解析您正在定义但无法解析的一些 MCSessionDelegate 函数消除歧义，因为调用不完整。然而，您似乎正在尝试分配外部作用域中定义的那些变量之一。我认为您真正想要的是将所有这些变量移至您的 MCPManager 类的定义中，如下所示:

import UIKit
import MultipeerConnectivity

class MCPManager: NSObject, MCSessionDelegate {
    var session : MCSession!
    var peer : MCPeerID!
    var browser : MCNearbyServiceBrowser!
    var advertiser : MCNearbyServiceAdvertiser!
    var foundPeers = [MCPeerID]()
    var invitationHandler : ((Bool, MCSession?)->Void)!

    override init() {
        super.init()
        peer = MCPeerID(displayName: UIDevice.current.name)
        session = MCSession(peer: peer)
        session.delegate = self
    }

    // MCSessionDelegate methods ommited
}

这可以编译，我希望这是你想要的。