CocoaHeads Taichung2014.06.26

RAKI - 丫狸

iOS藍⽛牙內網技術這是⽩白話⽂文

Multipeer Connectivity Framework 其實就是 iOS7 的

https://dl.dropboxusercontent.com/u/2857188/MCDemo.zip

Multipeer Connectivity Framework

以Blueooth或是Wi-Fi建設起近場網絡 使附近的設備可以彼此聯通 無需通過web server中介處理

相連的節點都能夠安全地傳輸 1 NSData 訊息資料 2 Resources ⽂文件檔案 3 Streaming data 影⾳音串流

在網狀網絡中，所有設備可以彼此直接通信，⽽而無需central hub

App 實例

Firechat

iOS Android

iOS+Android SDK-P2P網

個⼈人區域網路NFC?

iBeacon? BLE?

Multipeer?

CoreBluetooth 低功耗藍⽛牙框架

Multipeer 網狀網絡框架MCPeerID：周邊設備。 MCSession：內網會議室。 MCAdvertiserAssistant：廣播給附近的設備（快速版）。 MCBrowserViewController：搜尋附近的設備（快速版）。 MCNearbyServiceAdvertiser：廣播給附近的設備（實作版）。 MCNearbyServiceBrowser：搜尋附近的設備（實作版）。

CBCentralManager 搜尋/連線/處理資料(中央設備)CBPeripheral 廣播/傳送/接收資料(外部設備)

快速對照

CoreBluetooth 低功耗藍⽛牙框架

Multipeer 網狀網絡框架serviceType(指定連線服務) foundPeer(發現外部設備) didReceiveInvitationFromPeer(連接外部設備) lostPeer(外部設備斷線)

scanForPeripheralsWithServices:nil(指定連線服務) didDiscoverPeripheral(發現外部設備) didConnectPeripheral(連接外部設備) didDisconnectPeripheral(外部設備斷線)

快速對照

要進⼊入程式碼了!新⼿手上場請多多包涵

1/5 Creating a Peer_peerID = [[MCPeerID alloc] initWithDisplayName:displayName];

2/5 Creating a Session_session = [[MCSession alloc] initWithPeer:_peerID]; _session.delegate = self;

3/5 內建廣播_advertiser = [[MCAdvertiserAssistant alloc] initWithServiceType:ServiceType discoveryInfo:nil session:_session]; [_advertiser start];

4/5 內建搜尋 _browser = [[MCBrowserViewController alloc]

initWithServiceType:ServiceType session:_session];

5/5 開啟⾯面板[[[appDelegate mcManager] advertiser] setDelegate:self]; [[[appDelegate mcManager] browser] setDelegate:self]; !

[self presentViewController:[[appDelegate mcManager] browser] animated:YES completion: ^{NSLog(@"打開browser");}];

MCBrowserViewControllerDelegate-(void)browserViewControllerDidFinish:(MCBrowserViewController *)browserViewController { NSLog(@"完成browser"); [appDelegate.mcManager.browser dismissViewControllerAnimated:YES completion:nil]; } !

-(void)browserViewControllerWasCancelled:(MCBrowserViewController *)browserViewController { NSLog(@"取消browser"); [appDelegate.mcManager.browser dismissViewControllerAnimated:YES completion:nil]; }

Demo：跨協定Peer互通

3/5 實作AdvertisingappDelegate.mcManager.NearbyAdvertiser = [[MCNearbyServiceAdvertiser alloc] initWithPeer:appDelegate.mcManager.peerID discoveryInfo:nil serviceType:appDelegate.mcManager.ServiceType]; appDelegate.mcManager.NearbyAdvertiser.delegate = self; [appDelegate.mcManager.NearbyAdvertiser startAdvertisingPeer];

4/5 實作DiscoveringappDelegate.mcManager.NearbyBrowser = [[MCNearbyServiceBrowser alloc] initWithPeer:appDelegate.mcManager.peerID serviceType:appDelegate.mcManager.ServiceType]; !

appDelegate.mcManager.NearbyBrowser.delegate = self; [appDelegate.mcManager.NearbyBrowser startBrowsingForPeers];

5/5 實作⾃自訂介⾯面

剩下的交給MCSessionDelegate

foundPeer 函式可收集找到的設備 _session.connectedPeers 可列出已連線設備

-(void)session:(MCSession *)session peer:(MCPeerID *)peerID didChangeState:(MCSessionState)state { NSLog(@"Session for peer: %@, changed state to: %i", peerID, (int)state); //MCSessionStateNotConnected, // not in the session //MCSessionStateConnecting, // connecting to this peer //MCSessionStateConnected // connected to the session} }

MCNearbyServiceBrowserDelegate-(void)browser:(MCNearbyServiceBrowser *)browser foundPeer:(MCPeerID *)peerID withDiscoveryInfo:(NSDictionary *)info { if (![appDelegate.mcManager.session.connectedPeers containsObject:peerID]{ //TODO:直接邀請 [appDelegate.mcManager.NearbyBrowser invitePeer:peerID toSession:appDelegate.mcManager.session withContext:nil timeout:0.0]; }

MCNearbyServiceAdvertiserDelegate- (void)advertiser:(MCNearbyServiceAdvertiser *)advertiser didReceiveInvitationFromPeer:(MCPeerID *)peerID withContext:(NSData *)context invitationHandler:(void(^)(BOOL accept, MCSession *session))invitationHandler { //TODO:直接同意 !

或是 !

//TODO:⾃自訂詢問 }

MCNearbyServiceAdvertiserDelegate

//TODO:⾃自訂詢問 arrayInvitationHandler = [NSArray arrayWithObject:[invitationHandler copy]]; UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:peerID.displayName message:@"Would like to create a session with you" delegate:self cancelButtonTitle:@"Decline" otherButtonTitles:@"Accept", nil]; [alertView show];

//TODO:直接同意 invitationHandler(YES,appDelegate.mcManager.session);

UIAlertViewDelegate- (void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { BOOL accept = (buttonIndex != alertView.cancelButtonIndex) ? YES : NO; //TODO:回答詢問 if(accept) { NSLog(@"Session accept"); void (^invitationHandler)(BOOL, MCSession *) = [arrayInvitationHandler objectAtIndex:0]; invitationHandler(accept, appDelegate.mcManager.session); } else { NSLog(@"Session disallowed"); } }

發送訊息MCSessionDelegate

MCSessionDelegate// Received data from remote peer -(void)session:(MCSession *)session didReceiveData:(NSData *)data fromPeer:(MCPeerID *)peerID { NSString *message = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; !

NSDictionary *dict = @{@"data": data,@"peerID": peerID }; [[NSNotificationCenter defaultCenter] postNotificationName:@"MCDidReceiveDataNotification" object:nil userInfo:dict]; }

MCSessionDelegate// Start receiving a resource from remote peer -(void)session:(MCSession *)session didStartReceivingResourceWithName:(NSString *)resourceName fromPeer:(MCPeerID *)peerID withProgress:(NSProgress *)progress

// Finished receiving a resource from remote peer -(void)session:(MCSession *)session didFinishReceivingResourceWithName:(NSString *)resourceName fromPeer:(MCPeerID *)peerID atURL:(NSURL *)localURL withError:(NSError *)error

MCSessionDelegate// Received a byte stream from remote peer -(void)session:(MCSession *)session didReceiveStream:(NSInputStream *)stream withName:(NSString *)streamName fromPeer:(MCPeerID *)peerID { NSLog(@"Session started receiving stream: %@ with name: %@ from peer: %@", stream, streamName, peerID); }

Demo：⽣生活應⽤用⺫⽬目標同步 - 出遊規劃分⼯工同步戰術指導 - 儲存下來還可以有回合制延伸螢幕 - 再⼤大的投影機都還是有搖滾區導覽解說 - 更⽣生動即時的旅遊回憶（個⼈人語⾳音導覽機偏向iBeacon)點餐系統 - 不必架設server很多事都可以在⼩小型區域內快速達成會議記錄 - 開完會⾼高校產出跨部會記錄表互動教材 - 學習模式數位化，資料收集可排除網路環境的限制

感謝聆聽RAKI - 丫狸

raki-fox@msn.com