CoreBluetooth [警告]未知錯誤：311使用iOS中的CoreBluetooth Framework反覆連接和斷開連接時發生

Question

當我嘗試連接藍牙設備時，它反覆無法連接並顯示錯誤CoreBluetooth[WARNING] Unknown error: 311。我正在使用2個iPod 5 Touch設備。

Answer 1

我已經運行到這個也是一樣，它似乎是在藍牙核心的XPC通信的錯誤：

2013-03-22 14:49:24.652 Buggy[985:907] Connecting to peripheral <CBConcretePeripheral: 0x1dd4e150 UUID = (null), Name = "iPhone 5 #003014", IsConnected = NO> 
2013-03-22 14:49:24.659 Buggy[985:907] CoreBluetooth[WARNING] Unknown error: 311 
2013-03-22 14:49:24.661 Buggy[985:907] Failed to connect to peripheral <CBConcretePeripheral: 0x1dd4e150 UUID = (null), Name = "iPhone 5 #003014", IsConnected = NO> 
2013-03-22 14:49:24.689 Buggy[985:907] Discovered peripheral <CBConcretePeripheral: 0x1dd644d0 UUID = (null), Name = "iPhone 5 #003014", IsConnected = NO> with advertisement data { 
    kCBAdvDataLocalName = "iPhone 5 #003014"; 
    kCBAdvDataServiceUUIDs =  (
     "Unknown (<b2e74c08 96094371 a8f0978c 655700ea>)" 
    ); 
}, RSSI: -50 
2013-03-22 14:49:24.692 Buggy[985:907] Connecting to peripheral <CBConcretePeripheral: 0x1dd644d0 UUID = (null), Name = "iPhone 5 #003014", IsConnected = NO> 
2013-03-22 14:49:45.035 Buggy[985:110b] CoreBluetooth[ERROR] XPC connection interrupted, resetting 
2013-03-22 14:49:45.050 Buggy[985:907] Central manager updated state to: 1 
2013-03-22 14:49:45.116 Buggy[985:907] Central manager updated state to: 4 
2013-03-22 14:49:47.271 Buggy[985:907] Central manager updated state to: 5 

後這點事情又開始工作，至少要等到錯誤311環再次來襲幾分鐘後。

下面是這一直是可靠的，我一個解決辦法：

// In centralManager:didFailToConnectPeripheral:error:, ARC enabled 
if (error.code == 0) { 
    self.centralManager.delegate = nil; 
    self.centralManager = nil; 
    // Remove all references to any peripherals you've been interacting with 
    [self.peripherals removeAllObjects]; 

    /* Some delay (more than the next iteration of the runloop, less than 2 seconds) is required in order to: 
    * • Allow ARC to drain the autorelease pool, ensuring destruction of the centralManager 
    * • Allow Core Bluetooth to turn off the radio. 
    * 
    * This means that this workaround might not work if: 
    * • Your code has another active central manager somewhere 
    * • Another app is using BLE (in theory; I haven't tested this) 
    */ 
    double delayInSeconds = 2.0; 
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC)); 
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){ 
     self.centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:dispatch_get_main_queue()]; 
     [self startScanning]; 
    }); 
} 

Answer 2

如果連接了一段時間後得到的錯誤似乎很有可能在分析和解決方案將幫助：

http://lists.apple.com/archives/bluetooth-dev/2013/Jan/msg00069.html