MultipeerConnectivity会话管理

Question

我真的被困在现在试图在MultipeerConnectivityFramework中掌握邀请。

现在我有一个ipad应用充当广告客户和一个iphone应用充当浏览器。 我已经实现了MultipeerFramework一个sharedService，也做了以下内容：

广告

@implementation MultipeerConnectivityService { 
    MCNearbyServiceAdvertiser *_advertiser; 
    MCSession *_session; 
    MCNearbyServiceBrowser *_browser;   
} 

- (void)automaticAdvertiseWithName:(NSString *)name { 
    MCPeerID *peerID = [[MCPeerID alloc] initWithDisplayName:name]; 
    _session = [[MCSession alloc] initWithPeer:peerID]; 
    _session.delegate = self; 

    _advertiser = [[MCNearbyServiceAdvertiser alloc] initWithPeer:peerID discoveryInfo:nil serviceType:kServiceType]; 
    _advertiser.delegate = self; 
    [_advertiser startAdvertisingPeer]; 
} 

- (void)advertiser:(MCNearbyServiceAdvertiser *)advertiser didReceiveInvitationFromPeer:(MCPeerID *)peerID withContext:(NSData *)context invitationHandler:(void (^)(BOOL, MCSession *))invitationHandler { 
    invitationHandler([@YES boolValue], _session); 
    NSLog(@"Invitation accepted"); 
} 

浏览器

- (void)automaticBrowsingWithName:(NSString *)name { 
    MCPeerID *peerID = [[MCPeerID alloc] initWithDisplayName:name]; 
    _browser = [[MCNearbyServiceBrowser alloc] initWithPeer:peerID serviceType:kServiceType]; 
    _browser.delegate = self; 
    [_browser startBrowsingForPeers]; 
} 

- (void)browser:(MCNearbyServiceBrowser *)browser didNotStartBrowsingForPeers:(NSError *)error { 
    if ([_delegate respondsToSelector:@selector(browser:didNotStartBrowsingForPeers:)]) { 
     [_delegate browserDidNotStartBrowsingForPeers]; 
    } 
} 
- (void)browser:(MCNearbyServiceBrowser *)browser foundPeer:(MCPeerID *)peerID withDiscoveryInfo:(NSDictionary *)info { 
    [browser invitePeer:peerID toSession:[self getMCSession] withContext:nil timeout:10]; 
    if ([_delegate respondsToSelector:@selector(browser:foundPeer:)]) { 
     [_delegate browser:browser foundPeer:peerID]; 
    } 
} 
- (void)browser:(MCNearbyServiceBrowser *)browser lostPeer:(MCPeerID *)peerID { 
    if ([_delegate respondsToSelector:@selector(browserLostPeer:)]) { 
     [_delegate browserLostPeer:peerID]; 
    } 
} 

- (MCSession *) getMCSession { 
    return _session; 
} 

但后来我越来越为控制台反馈：

-[MCNearbyServiceBrowser invitePeer:toSession:withContext:timeout:] Bad argument session=nil 

当我查找找到的广告客户时，一切正常。我的广告客户iPad正在被找到。但我如何管理邀请？

所以我现在不明白...当我通过浏览器发送邀请时，我必须使用什么会话？在iPad上，我可以像在“automaticAdvertiseWithName”方法中看到的那样设置会话。但在iPhone上，我不这样做时，调用“automaticBrowsingWithName”...是这样的问题？他们不一定要成为同一个会话才能成功连接它们吗？我怎样才能成功邀请我的广告客户iPad到浏览器？

当广告客户已经创建新会话时，我感到困惑。

我实际上并不确定，如果代理didReceiveInvitation将对等体添加到connectedPeers中。

- (void)automaticAdvertiseWithName:(NSString *)name { 
    MCPeerID *peerID = [[MCPeerID alloc] initWithDisplayName:name]; 
    self.session = [[MCSession alloc] initWithPeer:peerID]; 
    self.session.delegate = self; 
    _advertiser = [[MCNearbyServiceAdvertiser alloc] initWithPeer:peerID discoveryInfo:nil serviceType:kServiceType]; 
    _advertiser.delegate = self; 
    [_advertiser startAdvertisingPeer]; 
} 
- (void)advertiser:(MCNearbyServiceAdvertiser *)advertiser didReceiveInvitationFromPeer:(MCPeerID *)peerID withContext:(NSData *)context invitationHandler:(void (^)(BOOL, MCSession *))invitationHandler { 
    BOOL accept = YES; 
    invitationHandler(accept, self.session); 
    NSLog(@"Invitation accepted: %@", self.session); 
} 

当我在会话中调用属性“connectedPeers”时，即使委托人找到一个属性，根本没有连接的对等体。我在那里犯错了吗？

Answer 1

你的问题是你的session在你调用invitePeer时是空的：toSession：withContext：timeout ...无论如何，你有两个选择来解决这个问题。

你有两个选择：
选项1 - 移动的peerID创建，会话创建和会议委托指派在其在所有时间执行的地方。例如，在MultiPerConnectivityService类的init代码中，如果它的viewDidLoad中有一个UIViewController。

选项2 - 添加下面的代码片段打电话之前 “invitePeer：toSession：withContext：超时：”

if (!_session) { 
     MCPeerID *peerID = [[MCPeerID alloc] initWithDisplayName:@"Browser"]; // you can customize the name here 
    _session = [[MCSession alloc] initWithPeer:peerID]; 
    _session.delegate = self; 
} 

希望这有助于...祝你好运！