ios7中的多人连接中的消息发送失败

Question

我想使用多人连接框架制作一个GroupChat应用程序。Al首先，我用这个代码初始化会话

self.peerID =[[MCPeerID alloc] initWithDisplayName:[UIDevice currentDevice].name];
self.session = [[MCSession alloc] initWithPeer:self.peerID];
self.session.delegate  =self;

然后，我尝试通过以下代码向所有连接的对等设备发送消息。

NSData *data = [message dataUsingEncoding:NSUTF8StringEncoding];
if (![self.session sendData:data
                    toPeers:@[self.remotePeers]
                   withMode:MCSessionSendDataReliable
                      error:&error]) {
    NSLog(@"[Error] %@", error);
}

但这会产生以下错误

 Error Domain=MCSession Code=1 "Peers (
        (
        "iPhone Simulator"
    )
) not connected" UserInfo=0x155e0cc0 {NSLocalizedDescription=Peers (
        (
        "iPhone Simulator"
    )
) not connected}

这里的"iPhone模拟器"是附近的peerDevice。请帮帮我。谢谢。

Answer 1

您应该为MCSession 实现委托方法

#pragma mark - MCSessionDelegate
- (void)session:(MCSession *)session peer:(MCPeerID *)peerID didChangeState:(MCSessionState)state {
NSLog(@"client: status changed to %d for server: %@", state, peerID.displayName);
switch (state) {
    case MCSessionStateNotConnected: {
        [self.servers removeServerItemByPeedID:peerID];
        [self notifyDidChangeServers];
    }
        break;
    case MCSessionStateConnected: {
        if ([self checkPeerIsServer:peerID]) {
            ServerItem *item = [[ServerItem alloc] initWithPeerID:peerID];
            [self.servers singleAddServerItem:item];
            [self notifyDidChangeServers];
        } else {
            NSLog(@" Connected  Client");
        }
    }
        break;
    default:
        break;
}
 NSLog(@"connectedPeers %@", self.session.connectedPeers);
}
- (void)session:(MCSession *)session didReceiveData:(NSData *)data fromPeer:(MCPeerID *)peerID {
NSLog(@"client: received data (len = %lu) from server %@",(unsigned long)[data length], peerID.displayName);
//handle receive data
}
 - (void) session:(MCSession*)session didReceiveCertificate:(NSArray*)certificate fromPeer:(MCPeerID*)peerID certificateHandler:(void (^)(BOOL accept))certificateHandler {
    certificateHandler(YES); 
}

请给我写一下结果，