Multipeer Connectivity foundDevice兩次

我有下面的代碼，我的目標是讓Mac識別具有Multipeer Connectivity的iOS設備。這大部分工作，除了當我運行這兩個我得到兩個「發現!!!」在控制檯。我怎樣才能解決這個問題？Multipeer Connectivity foundDevice兩次

這裏是我的iOS設備代碼：

import UIKit 
import MultipeerConnectivity 

class ViewController: UIViewController, MCNearbyServiceBrowserDelegate,  MCNearbyServiceAdvertiserDelegate { 


let browser = MCNearbyServiceBrowser(peer: MCPeerID(displayName: "iOS Device"), serviceType: "example-test") 
let peerID = MCPeerID(displayName: "iOS Device") 
let advertiser = MCNearbyServiceAdvertiser(peer: MCPeerID(displayName: "iOS Device"), discoveryInfo: nil, serviceType: "example-test") 



override func viewDidLoad() { 
    super.viewDidLoad() 
    advertiser.delegate = self 
    advertiser.startAdvertisingPeer() 
    browser.delegate = self 
    browser.startBrowsingForPeers() 
} 

func browser(_ browser: MCNearbyServiceBrowser, lostPeer peerID: MCPeerID) { 

} 

func browser(_ browser: MCNearbyServiceBrowser, didNotStartBrowsingForPeers error: Error) { 

} 

func browser(_ browser: MCNearbyServiceBrowser, foundPeer peerID: MCPeerID, withDiscoveryInfo info: [String : String]?) { 
    print("FOUND!!!") 
} 

func advertiser(_ advertiser: MCNearbyServiceAdvertiser, didNotStartAdvertisingPeer error: Error) { 

} 

func advertiser(_ advertiser: MCNearbyServiceAdvertiser, didReceiveInvitationFromPeer peerID: MCPeerID, withContext context: Data?, invitationHandler: @escaping (Bool, MCSession?) -> Void) { 

} 


}

，以及在Mac：

import MultipeerConnectivity 

class ConnectionsManager: NSObject, MCNearbyServiceBrowserDelegate,  MCNearbyServiceAdvertiserDelegate { 


let browser : MCNearbyServiceBrowser 
let advertiser: MCNearbyServiceAdvertiser 
let peerID = MCPeerID(displayName: "macDevice") 



override init() { 
    advertiser = MCNearbyServiceAdvertiser(peer: MCPeerID(displayName: "mac Device"), discoveryInfo: nil, serviceType: "example-test") 
    browser = MCNearbyServiceBrowser(peer: MCPeerID(displayName: "mac Device"), serviceType: "example-test") 
    super.init() 
    advertiser.delegate = self 
    advertiser.startAdvertisingPeer() 
    browser.delegate = self 
    browser.startBrowsingForPeers() 
} 
deinit { 
    browser.stopBrowsingForPeers() 
    advertiser.stopAdvertisingPeer() 
} 

    func browser(_ browser: MCNearbyServiceBrowser, lostPeer peerID: MCPeerID) { 

    } 

    func browser(_ browser: MCNearbyServiceBrowser, didNotStartBrowsingForPeers error: Error) { 

    } 

    func browser(_ browser: MCNearbyServiceBrowser, foundPeer peerID: MCPeerID, withDiscoveryInfo info: [String : String]?) { 
     print("FOUND!!!") 
    } 

    func advertiser(_ advertiser: MCNearbyServiceAdvertiser, didNotStartAdvertisingPeer error: Error) { 

    } 

    func advertiser(_ advertiser: MCNearbyServiceAdvertiser, didReceiveInvitationFromPeer peerID: MCPeerID, withContext context: Data?, invitationHandler: @escaping (Bool, MCSession?) -> Void) { 

    } 



    }

感謝，

來源

2016-11-20 Zander

有在開發過程中改變任一設備的節點ID顯示名稱？當我使用類似的Apple感應技術iBeacon時，如果更改了名稱/對等ID，則會導致內核中的映射重複到單個設備，從而導致對一個設備進行兩次檢測。嘗試從每臺設備中刪除應用，然後查看問題是否仍然存在。 – Midas

這是因爲該方式圖謀的發生宣傳他們的可用性其他設計。

每當外設準備好溝通，他們發送的數據包的信息，這就是所謂的廣告。根據廣告數據，發現時可能會返回額外的數據。

如果外圍支持主動掃描和應用程序是在前臺，你會得到兩個調用到didDiscoverPeripheral。第一個呼叫包含來自外設的廣告數據包中的數據。第二個調用包含來自外設掃描響應數據包的附加數據。

欲瞭解更多信息結賬this thread。

如何解決這個問題？您可以保留您收到的ID列表，並放棄您爲該特定對等ID獲得的任何額外發現呼叫。

（檢查出的bluetooth advertising更多信息藍牙文檔）

來源

2016-11-28 09:05:32

Multipeer Connectivity foundDevice兩次

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