MCSessionDelegate要求類符合NSObjectProtocol

Question

我試圖使用Apple的MultipeerConnectivity庫，但我的班級不會停止拋出錯誤“ Type LocalClient不符合NSObjectProtocol”。 我是否遺漏了會導致此錯誤的任何內容？

import Foundation
import MultipeerConnectivity

class LocalClient : MCSessionDelegate {
    var availableServers : [Int]
    var session : MCSession
    var peerID : MCPeerID
    var browser : MCBrowserViewController

    init(name : String) {
        peerID = MCPeerID(displayName: name)

        session = MCSession(peer: peerID)
        session.delegate = self

        browser = MCBrowserViewController(serviceType: "JoinGame", session: session)
    }

    func session(session: MCSession!, peer peerID: MCPeerID!, didChangeState state: MCSessionState) {

    }

    func session(session: MCSession!, didReceiveData data: NSData!, fromPeer peerID: MCPeerID!) {

    }

    func session(session: MCSession!, didStartReceivingResourceWithName resourceName: String!, fromPeer peerID: MCPeerID!, withProgress progress: NSProgress!) {

    }

    func session(session: MCSession!, didFinishReceivingResourceWithName resourceName: String!, fromPeer peerID: MCPeerID!, atURL localURL: NSURL!, withError error: NSError!) {

    }

    func session(session: MCSession!, didReceiveStream stream: NSInputStream!, withName streamName: String!, fromPeer peerID: MCPeerID!) {

    }

}

編輯：格式化。

Answer 1

MCSessionDelegate協議是從NSObjectProtocol派生的。 因此，您的類應該是NSObject的子類，以便它繼承所有NSObjectProtocol方法：

class LocalClient : NSObject, MCSessionDelegate {  }

這還要求您調用super.init() （在將值分配給所有屬性之后）：

init(name : String) {
    peerID = MCPeerID(displayName: name)
    session = MCSession(peer: peerID)
    availableServers = []
    browser = MCBrowserViewController(serviceType: "JoinGame", session: session)

    super.init()

    session.delegate = self
}