ios本地域名解析

import Foundation
import MultipeerConnectivity

class DiscoveryManager: NSObject, MCNearbyServiceBrowserDelegate, MCNearbyServiceAdvertiserDelegate {
    var browser: MCNearbyServiceBrowser!
    var advertiser: MCNearbyServiceAdvertiser!

    override init() {
        super.init()
        browser = MCNearbyServiceBrowser(serviceType: "my-service", peer: MCPeerID(displayName: UIDevice.current.name))
        browser.delegate = self
        advertiser = MCNearbyServiceAdvertiser(serviceType: "my-service", discoveryInfo: nil, session: nil)
        advertiser.delegate = self
    }

    func start() {
        browser.startBrowsing(forPeers: nil)
        advertiser.startAdvertisingPeer()
    }

    // MARK: - MCNearbyServiceBrowserDelegate

    func browser(_ browser: MCNearbyServiceBrowser, foundPeer peerID: MCPeerID, withDiscoveryInfo info: [String : String]?) {
        print("Found peer: \(peerID.displayName)")
    }

    func browser(_ browser: MCNearbyServiceBrowser, lostPeer peerID: MCPeerID) {
        print("Lost peer: \(peerID.displayName)")
    }

    // MARK: - MCNearbyServiceAdvertiserDelegate

    func advertiser(_ advertiser: MCNearbyServiceAdvertiser, didReceiveInvitationFromPeer peerID: MCPeerID, withContext context: Data?, invitationHandler: @escaping (Bool, MCSession?) -> Void) {
        print("Received invitation from peer: \(peerID.displayName)")
        invitationHandler(true, nil)
    }
}