IOS7 Multipeer Connectivity 创建带有发现信息的自定义邀请

Question

我如何创建自定义邀请以显示来自广告商的发现信息？

这是来 self 的广告客户的代码:

// create Discovery Info
NSArray *objects=[[NSArray alloc] initWithObjects:@"datguy",@"28", nil];
NSArray *keys = [[NSArray alloc] initWithObjects:@"Name",@"Age", nil];
self.dictionaryInfo = [[NSDictionary alloc] initWithObjects:objects forKeys:keys];

//  Setup Advertiser
self.advertiser = [[MCAdvertiserAssistant alloc] initWithServiceType:@"txt_msg_service" discoveryInfo:self.dictionaryInfo session:self.advertiseSession];
[self.advertiser start];

Answer 1

我想你搞反了。 IFAIK，MCAdvertiserAssistant 的 discoveryInfo 是广告商为浏览器传递的信息。此信息传递给:

- (void)browser:(MCNearbyServiceBrowser *)browser foundPeer:(MCPeerID *)peerID withDiscoveryInfo:(NSDictionary *)info

这是 MCNearbyServiceBrowser 类的委托(delegate)方法。对此:

– browserViewController:shouldPresentNearbyPeer:withDiscoveryInfo:
Which is the delegate for the MCBrowserViewController class.

此信息应用于检查是否应为您的用户显示此广告商。

如果您有兴趣拦截邀请尝试，您应该考虑使用 MCNearbyServiceAdvertiser 类而不是助手。通过这种方式，您可以委托(delegate) didReceiveInvitationFromPeer 方法并向其添加一些自定义逻辑:

// pedido para entrar na sala.
- (void)advertiser:(MCNearbyServiceAdvertiser *)advertiser didReceiveInvitationFromPeer:(MCPeerID *)peerID
       withContext:(NSData *)context
 invitationHandler:(void (^)(BOOL accept, MCSession *session))invitationHandler {
    // get the browser's info
    NSDictionary *peerInfo = (NSDictionary *) [NSKeyedUnarchiver unarchiveObjectWithData:context];

    //check if peer is valid for this room (add your custom logic in this method)
    if ([self isValidForThisRoom:peerInfo]) {
        //create an alert
        NSObject *clientName = [peerInfo valueForKey:@"playerName"];
        NSString *clientMessage = [[NSString alloc] initWithFormat:@"%@ wants to connect. Accept?", clientName];
        UIAlertView *alertView = [[UIAlertView alloc]
                initWithTitle:@"Accept Connection?"
                      message:clientMessage
                     delegate:self
            cancelButtonTitle:@"No"
            otherButtonTitles:@"Yes", nil];
        [alertView show];

        // copy the invitationHandler block to an array to use it later
        ArrayInvitationHandler = [NSArray arrayWithObject:[invitationHandler copy]];
    } else {
        // if the peer is not valid, decline the invitation
        invitationHandler(NO, _session);
    }
}

在 alertview 的 clickedButtonAtIndex 委托(delegate)上，您可以执行如下操作:

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    //obtem a decisao do usuario
    BOOL accept = (buttonIndex != alertView.cancelButtonIndex) ? YES : NO;

    // obtem o invitationHandler que foi guardado do didReceiveInvitationFromPeer
    void (^invitationHandler)(BOOL, MCSession *) = [ArrayInvitationHandler objectAtIndex:0];

    // chama o invitationHandler passando a nossa session
    invitationHandler(accept, _session);
}

需要注意的两件重要事情是:

1. 您的 session 对象应该是一个实例变量，而不是我在某些代码示例中看到的本地变量。根据我的经验，我只是创建了一个静态共享实例来存储 session 对象。如果您想将 session 从一个屏幕传递到另一个屏幕，这也是一个不错的计划。

2. 请注意，您应该创建一个 NSArray *ArrayInvitationHandler；存储 block 代码的变量。我尝试执行 Block_copy，但出现了一些转换错误，所以 someone在 stackoverflow 中，这里决定存储在一个数组中，我认为这已经足够优雅了。

无论如何，我使用这个设置让它工作。希望对你有帮助:D