didDisconnectPeripheral 未调用 iOS Swift 3

Question

我正在尝试断开与 BLE 设备的连接。我在做 cancelPeripheralConnection()，它从不调用 didDisconnectPeripheral()。我将通知值设置为一个特征，因此在断开连接时我将其设置为 false。

{

BLEOperations.sharedInstance.connectedDevice?.setNotifyValue(false, for: BLEOperations.sharedInstance.peripheralCharacteristics[0])

BLEOperations.sharedInstance.manager.cancelPeripheralConnection(BLEOperations.sharedInstance.connectedDevice!)

}

当用户尝试连接到新设备时，我正在尝试断开 connectedPeripheral。当前设备未断开连接，但新设备与旧设备一起连接。

{

BLEOperations.sharedInstance.manager.connect(self.peripheralArray[indexPath.row] as! CBPeripheral , options: nil)

}

我在这里做错了什么？当设备连接丢失时，正在调用该方法。

Answer 1

好吧，我们可能需要有关您的代码的更多信息。但是你要找的方法就是这个

func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {
    disconnected(central: central)
}

您应该将 centralManager 的委托设置为自己，并且每次外围设备断开连接时它都应该调用委托。做了一些测试，断开连接的过程并不像看起来那么好，你可以看到你的外围设备仍然断开连接但是委托已经被调用（这可以通过硬件本身或你的外围设备上的固件来调整）。

顺便说一句，您可以同时连接多个设备。

Answer 2

取消与外围设备的活动或挂起连接

class ViewController: UIViewController, CBCentralManagerDelegate {

  var manager: CBCentralManager!
  var peripherals: [CBPeripheral]?

  @IBAction func actionScanBLEDevice(_ sender: AnyObject) {
     manager = CBCentralManager (delegate: self, queue: nil)
  }

  @IBAction func actionDisconnectBLE(_ sender: AnyObject) {
     //Use As per need where you want to disconnect perticular  peripheral
     manager.cancelPeripheralConnection(peripheral[0]) // Disconnent numbers of BLE Devices
  }

  func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) {
     //Manage Some Condition then disconnect
     print("Disconnected from peripheral")  
     peripherals?.append(peripheral)
  }  

  func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {

    print("Discovered peripheral \(peripheral.name,peripheral.identifier.uuidString)")
    print("advertisementData\(advertisementData)")
    // Use discovered peripheral here 
  }

  func centralManagerDidUpdateState(_ central: CBCentralManager) {
    print("Checking")
    switch(central.state)
    {
    case.unsupported:
        print("BLE is not supported")
    case.unauthorized:
        print("BLE is unauthorized")
    case.unknown:
        print("BLE is Unknown")
    case.resetting:
        print("BLE is Resetting")
    case.poweredOff:
        print("BLE service is powered off")
    case.poweredOn:
        print("BLE service is powered on")
        print("Start Scanning")
        manager.scanForPeripherals(withServices: nil, options: nil)
    }
  }

}

Answer 3

当CentralManager在整个流程中只有一个实例时，它会正常工作。

您可以创建 CentralManager 操作 class（这是一个单例）并执行操作，而不是在 viewcontroller 中使用 centralmanagerdelegates。

我做到了，效果很好。

didDisconnectPeripheral 未调用 iOS Swift 3

didDisconnectPeripheral not called iOS Swift 3

xcode

disconnect

ios

cbperipheral

swift3

取消与外围设备的活动或挂起连接