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取消訂閱頻道，仍在頻道

2014-11-08 90 views
2

我使用PubNub作爲IOS應用程序（IOS SDK 8.0）。當我試圖從「applicationDidEnterBackground」事件中取消訂閱頻道時，我得到以下控制檯輸出。它表示該頻道沒有訂閱，但是當我從管理控制檯查看時，我仍在頻道中。你能提供一些建議嗎？取消訂閱頻道，仍在頻道

這裏是我使用 「applicationDidEnterBackground」 行：

PubNub.unsubscribeFromChannel(channelToReceive,{(list, err:PNError!)-> Void in 
     if(err != nil){ 
      println(err.localizedFailureReason) 
     } else { 
      println("Unsubscribed...") 
     } 
    })

這裏是 「applicationDidEnterBackground」 事件後PubNub控制檯輸出：

2014-11-08 14:47:16.585 Chat[263:60b] PubNub (0x14d7a2b0) TRYING TO UNSUBSCRIBE FROM CHANNELS: (
    "PNChannel(0x14d28150) b905359780766" 
) (STATE: 'connected') 
2014-11-08 14:47:16.587 Chat[263:60b] PubNub (0x14d7a2b0) UNSUBSCRIBE FROM CHANNELS (STATE: 'connected') 
2014-11-08 14:47:16.590 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] LEAVING SPECIFIC SET OF CHANNELS... (STATE: 10) 
2014-11-08 14:47:16.625 Chat[263:60b] PubNub (0x14d7a2b0) WILL UNSUBSCRIBE FROM CHANNELS: (
    "PNChannel(0x14d28150) b905359780766", 
    "PNChannelPresence(0x14dc64f0) b905359780766-pnpres" 
) (STATE: 'connected') 
2014-11-08 14:47:16.632 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::WRITE] WRITE BUFFER CONTENT (STATE: 33683456) 
2014-11-08 14:47:16.640 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] WILL START REQUEST PROCESSING: <PNLeaveRequest|/v2/presence/sub_key/sub*****7fe/channel/b905359780766/leave?uuid=b905359780766&callback=lv_7cba2&pnsdk=PubNub-ObjC-iOS%2F3.6.7> (STATE: 8) 
2014-11-08 14:47:16.645 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] RECONNECTING BY REQUEST... (STATE: 8) 
2014-11-08 14:47:16.668 Chat[263:60b] PNReachability (0x14d88c00) PUBNUB SERVICES REACHABILITY CHANGED W/O EVENT [CONNECTED? 1 | NETWORK ADDRESS: 192.168.1.6](FLAGS: 65538) 
2014-11-08 14:47:16.673 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] TRYING TO RECONNECT... (STATE: 100792320) 
2014-11-08 14:47:16.677 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] DESTROYING STREAMS... (STATE: 100792328) 
2014-11-08 14:47:16.684 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] UNSCHEDULE REQUEST SENDING (32795e5c-a2cb-475b-993a-61077ea21744) (STATE: 67237896) 
2014-11-08 14:47:16.690 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] DID CANCEL REQUEST: <PNLeaveRequest|/v2/presence/sub_key/sub*****7fe/channel/b905359780766/leave?uuid=b905359780766&callback=lv_7cba2&pnsdk=PubNub-ObjC-iOS%2F3.6.7> (STATE: 0) 
2014-11-08 14:47:16.714 Chat[263:60b] PNReachability (0x14d88c00) PUBNUB SERVICES REACHABILITY CHANGED W/O EVENT [CONNECTED? 1 | NETWORK ADDRESS: 192.168.1.6](FLAGS: 65538) 
2014-11-08 14:47:16.720 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::READ] DESTROYING... (STATE: 129032) 
2014-11-08 14:47:16.726 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::READ] DESTROYED. (STATE: 126984) 
2014-11-08 14:47:16.731 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::WRITE] DESTROYING... (STATE: 126984) 
2014-11-08 14:47:16.742 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::WRITE] DESTROYED. (STATE: 122888) 
2014-11-08 14:47:16.748 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] READ AND WRITE STREAMS DESTROYED (STATE: 12582920) 
2014-11-08 14:47:16.757 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::WRITE] WRITE CANCELED (STATE: 12582920) 
2014-11-08 14:47:29.679 Chat[263:60b] PubNub (0x14d7a2b0) HANDLE APPLICATION ENTERED BACKGROUND (STATE: 'connected') 
2014-11-08 14:47:36.587 Chat[263:60b] PubNub (0x14d7a2b0) APPLICATION CAN'T RUN IN BACKGROUND (STATE: 'connected') 
2014-11-08 14:47:36.591 Chat[263:60b] PNReachability (0x14d88c00) REACHABILITY OBSEVATION SUSPENDED 
2014-11-08 14:47:36.594 Chat[263:60b] PubNub (0x14d7a2b0) SUSPENDING... (STATE: 'connected') 
2014-11-08 14:47:36.597 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] TRYING TO SUSPEND (STATE: 10) 
2014-11-08 14:47:36.600 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] SUSPENDING... (STATE: 10) 
2014-11-08 14:47:36.602 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] TRYING TO DISCONNECT... (BY USER REQUEST? 0) (STATE: 12582912) 
2014-11-08 14:47:36.604 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::READ] DISCONNECTING... (STATE: 12582912) 
2014-11-08 14:47:36.606 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] HANDLE STREAM CONNECTION CLOSED (STATE: 8912896) 
2014-11-08 14:47:36.611 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier::WRITE] DISCONNECTING... (STATE: 8912896) 
2014-11-08 14:47:36.613 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] HANDLE STREAM CONNECTION CLOSED (STATE: 1572864) 
2014-11-08 14:47:36.615 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] DISCONNECTED (STATE: 12582912) 
2014-11-08 14:47:36.617 Chat[263:60b] PNConnection (0x14d5cd40) [CONNECTION::PNMessagingConnectionIdentifier] NOTIFY DELEGATE ABOUT DISCONNECTION (STATE: 12582912) 
2014-11-08 14:47:36.619 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] HANDLE DISCONNECTION EVENT (STATE: 24) 
2014-11-08 14:47:36.634 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] LEAVE REQUEST COMPLETED (STATE: 0) 
2014-11-08 14:47:36.637 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] PRESENCE 'LEAVE' REQUEST ERROR: Domain=com.pubnub.pubnub; Code=107; Description="PubNub client can't perform request"; Reason="Looks like the client lost it's net connection"; Fix suggestion="Ensure that all network configuration (including any proxy) is correct, and try again."; Associated object=(null)\nCHANNELS: (
    "PNChannel(0x14d28150) b905359780766", 
    "PNChannelPresence(0x14dc64f0) b905359780766-pnpres" 
)\n(STATE: 0) 
2014-11-08 14:47:36.641 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] UNSUBSCRIBED FROM CHANNELS: (
    "PNChannel(0x14d28150) b905359780766", 
    "PNChannelPresence(0x14dc64f0) b905359780766-pnpres" 
)\n(STATE: 0) 
2014-11-08 14:47:36.648 Chat[263:60b] PubNub (0x14d7a2b0) SHOULD CHANNEL PNMessagingConnectionIdentifier (0x14d69800) NOTIFY DELEGATE? 0 (STATE: 'suspended') 
2014-11-08 14:47:36.651 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] HANDLE SUSPENSION EVENT (STATE: 24) 
2014-11-08 14:47:36.653 Chat[263:60b] PNMessagingChannel (0x14d69800) [CHANNEL::PNMessagingConnectionIdentifier] SUSPENDED (STATE: 160) 
2014-11-08 14:47:36.655 Chat[263:60b] PNServiceChannel (0x14d90d00) [CHANNEL::PNServiceConnectionIdentifier] TRYING TO SUSPEND (STATE: 8) 
2014-11-08 14:47:36.665 Chat[263:60b] PNServiceChannel (0x14d90d00) [CHANNEL::PNServiceConnectionIdentifier] SUSPENDING... (STATE: 8) 
2014-11-08 14:47:36.671 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier] TRYING TO DISCONNECT... (BY USER REQUEST? 0) (STATE: 2226176) 
2014-11-08 14:47:36.675 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier::READ] DISCONNECTING... (STATE: 2201600) 
2014-11-08 14:47:36.679 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier::READ] DESTROYING... (STATE: 2725888) 
2014-11-08 14:47:36.699 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier::READ] DESTROYED. (STATE: 2723840) 
2014-11-08 14:47:36.703 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier] HANDLE STREAM CONNECTION CLOSED (STATE: 2723840) 
2014-11-08 14:47:36.706 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier::WRITE] DISCONNECTING... (STATE: 2723840) 
2014-11-08 14:47:36.710 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier::WRITE] DESTROYING... (STATE: 3772416) 
2014-11-08 14:47:36.718 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier::WRITE] DESTROYED. (STATE: 3768320) 
2014-11-08 14:47:36.721 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier] HANDLE STREAM CONNECTION CLOSED (STATE: 3768320) 
2014-11-08 14:47:36.724 Chat[263:60b] PNConnection (0x14d959d0) [CONNECTION::PNServiceConnectionIdentifier] SUSPENDED (STATE: 12582912) 
2014-11-08 14:47:36.727 Chat[263:60b] PNServiceChannel (0x14d90d00) [CHANNEL::PNServiceConnectionIdentifier] HANDLE SUSPENSION EVENT (STATE: 24) 
2014-11-08 14:47:36.739 Chat[263:60b] PNServiceChannel (0x14d90d00) [CHANNEL::PNServiceConnectionIdentifier] SUSPENDED (STATE: 160)

在此先感謝。

來源

2014-11-08 uahakan

回答

1

那麼，如果你的應用程序不能永久地在後臺運行，當應用程序轉移到後臺執行狀態時，你不能調用這樣的命令。 您可以嘗試使用此回調來執行一些請求之前PubNub客戶端將與您的應用程序被暫停沿着：

- (void)pubnubClient:(PubNub *)client willSuspendWithBlock:(void(^)(void(^)(void(^)(void))))preSuspensionBlock { 

    if ([client isConnected]) { 

     preSuspensionBlock(^(void(^completionBlock)(void)){ 

      // Do last calls here 
      // Always call this block as soon as required amount of tasks completed. 
      completionBlock(); 
     }]; 
    }); 
    } 
}

來源

2014-11-11 23:47:09

+0

我有完全相同的問題。我試了你的代碼@moonlight，但isConnected是FALSE，所以沒有真正發生。 – GrandSteph 2014-12-03 21:36:11

+0

你能否詳細說明你的答案？我發現在進入後臺之前，willSuspendWithBlock並沒有被調用，但是在回到前臺時。這真是令人沮喪。這樣一個簡單的需要在去背景之前發送一個通知給一個頻道，我無法弄清楚。對自我estime不太好:( – GrandSteph 2015-01-20 21:47:04

1

您仍然連接，因爲pubnub而在後臺也沒有發出任何通知。更棘手的是，它會在返回前景時發送排隊的notif。

爲了讓Pubnub在後臺運行，您必須啓用適當的背景模式。一個需要websockets（pubnub也使用它們）在左邊選擇你的項目並轉到Capabilities選項卡。在那裏你會找到你可以啓用的所有背景模式。對於Pubnub，我聽到VOIP和位置更新將起作用。

我個人選擇位置更新。請記住，如果您不使用實際位置服務的位置服務，Apple會拒絕您的應用。正在對Pubnub進行一些研究，但對我來說很好，但是當我部署時，我可能會切換到HTTP請求，因爲它們被允許在後臺運行。

來源

2014-12-14 15:30:31 GrandSteph

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