Question

我在我的应用程序中有这个歌曲的播放列表。我想使用蓝牙在其他设备（iphone）上播放这个播放列表中的歌曲。

这就是我为

所做的

#import "BrowseStationsViewController.h"

@interface BrowseStationsViewController (){
GKSession *gkSession;
}

@end

@implementation BrowseStationsViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
 self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
    // Custom initialization
}
return self;
 }

#pragma mark - 
  - (void)viewDidLoad
{
   [super viewDidLoad];
// Do any additional setup after loading the view

   [self setupSession];

NSNotificationCenter *defaultCenter = [NSNotificationCenter defaultCenter];

// Register for notifications when the application leaves the background state
// on its way to becoming the active application.
[defaultCenter addObserver:self
                  selector:@selector(setupSession)
                      name:UIApplicationWillEnterForegroundNotification
                    object:nil];

// Register for notifications when when the application enters the background.
[defaultCenter addObserver:self
                  selector:@selector(teardownSession)
                      name:UIApplicationDidEnterBackgroundNotification
                    object:nil];


       }

- (void)didReceiveMemoryWarning
 {
 [super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
   }



     #pragma mark - GKSession setup and teardown

  - (void)setupSession
 {
gkSession = [[GKSession alloc] initWithSessionID:nil displayName:nil sessionMode:GKSessionModePeer];
gkSession.delegate = self;
gkSession.disconnectTimeout = kDisconnectTimeout;
gkSession.available = YES;

self.title = [NSString stringWithFormat:@"GKSession: %@", gkSession.displayName];
   }

 - (void)teardownSession
 {
[gkSession disconnectFromAllPeers];
gkSession.available = NO;
gkSession.delegate = nil;
 }


 #pragma mark - GKSessionDelegate protocol conformance

 - (void)session:(GKSession *)session peer:(NSString *)peerID didChangeState:     (GKPeerConnectionState)state
{
switch (state)
{
    case GKPeerStateAvailable:
    {
        NSLog(@"didChangeState: peer %@ available", [session displayNameForPeer:peerID]);

        [NSThread sleepForTimeInterval:kSleepTimeInterval];

        [session connectToPeer:peerID withTimeout:kConnectionTimeout];
        break;
    }

    case GKPeerStateUnavailable:
    {
        NSLog(@"didChangeState: peer %@ unavailable", [session displayNameForPeer:peerID]);
        break;
    }

    case GKPeerStateConnected:
    {
        NSLog(@"didChangeState: peer %@ connected", [session displayNameForPeer:peerID]);
        break;
    }

    case GKPeerStateDisconnected:
    {
        NSLog(@"didChangeState: peer %@ disconnected", [session displayNameForPeer:peerID]);
        break;
    }

    case GKPeerStateConnecting:
    {
        NSLog(@"didChangeState: peer %@ connecting", [session displayNameForPeer:peerID]);
        break;
    }
}

[self.tableView reloadData];
     }


- (void)session:(GKSession *)session didReceiveConnectionRequestFromPeer:(NSString  *)peerID
   {
NSLog(@"didReceiveConnectionRequestFromPeer: %@", [session displayNameForPeer:peerID]);

[session acceptConnectionFromPeer:peerID error:nil];

[self.tableView reloadData];
   }

    - (void)session:(GKSession *)session connectionWithPeerFailed:(NSString *)peerID withError:(NSError *)error
  {
NSLog(@"connectionWithPeerFailed: peer: %@, error: %@", [session displayNameForPeer:peerID], error);

[self.tableView reloadData];
    }

 - (void)session:(GKSession *)session didFailWithError:(NSError *)error
  {
NSLog(@"didFailWithError: error: %@", error);

[session disconnectFromAllPeers];

[self.tableView reloadData];
    }

 #pragma mark - UITableViewDataSource protocol conformance

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
  {
// We have 5 sections in our grouped table view,
// one for each GKPeerConnectionState
return 3;
   }

   - (NSInteger)tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section
  {
NSInteger rows;

NSInteger peerConnectionState = section;

switch (peerConnectionState)
{
    case GKPeerStateAvailable:
    {
        NSArray *availablePeers = [gkSession peersWithConnectionState:GKPeerStateAvailable];
        rows = availablePeers.count;
        break;
    }

    case GKPeerStateConnected:
    {
        NSArray *connectedPeers = [gkSession peersWithConnectionState:GKPeerStateConnected];
        rows = connectedPeers.count;
        break;
    }

    case GKPeerStateUnavailable:
    {
        NSArray *unavailablePeers = [gkSession peersWithConnectionState:GKPeerStateUnavailable];
        rows = unavailablePeers.count;
        break;
    }
}

// Always show at least 1 row for each GKPeerConnectionState.
if (rows < 1)
{
    rows = 1;
}

return rows;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
NSString *headerTitle = nil;

NSInteger peerConnectionState = section;

switch (peerConnectionState)
{
    case GKPeerStateAvailable:
    {
        headerTitle = @"Available Peers";
        break;
    }


    case GKPeerStateConnected:
    {
        headerTitle = @"Connected Peers";
        break;
    }


    case GKPeerStateUnavailable:
    {
        headerTitle = @"Unavailable Peers";
        break;
    }
}

return headerTitle;
 }

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString * cellId = @"Cell";
UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:cellId];
if(!cell){
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellId];
}


NSInteger peerConnectionState = indexPath.section;

NSArray *peers = nil;

switch (peerConnectionState)
{
    case GKPeerStateAvailable:
    {
        peers = [gkSession peersWithConnectionState:GKPeerStateAvailable];
        break;
    }

    case GKPeerStateConnected:
    {
        peers = [gkSession peersWithConnectionState:GKPeerStateConnected];
        break;
    }


    case GKPeerStateUnavailable:
    {
        peers = [gkSession peersWithConnectionState:GKPeerStateUnavailable];
        break;
    }
}

NSInteger peerIndex = indexPath.row;

if ((peers.count > 0) && (peerIndex < peers.count))
{
    NSString *peerID = [peers objectAtIndex:peerIndex];

    if (peerID)
    {
        cell.textLabel.text = [gkSession displayNameForPeer:peerID];
    }
}

return cell;
 }

  @end

please see the screen shot

现在我不知道如何继续。有人可以帮助我吗？通过选择一首歌可以在另一台设备上播放吗？

Answer 1

GameKit适用于设备间游戏。为此，您可能希望查看CBPeripheralManager或CBCentralManager，具体取决于您与之交互的设备。它的级别较低，因此您需要做更多的工作来建立连接，但是有大量的教程和示例代码可以帮助您解决问题。

Answer 2

好吧让我们到达你被卡住的地步..你可以使用与其他一些库相同的逻辑但这应该是这样的。您必须以块的形式发送歌曲数据并同步到另一个设备，而另一端收到上一个块。由于我们很清楚蓝牙没有很好的带宽，因此您必须专门调整传输速率到其他设备。一旦在设备上接收到一个块，发送到你的应用程序实例上运行该设备就应该播放它...并且并行探测来自发送设备的新块。在接收端，你只需使用FIFO方法进行处理你歌曲数据的传入块。

使用蓝牙在另一台设备上播放歌曲

2 个答案: