BLE IOS - CBPeripheralManager .updatevalue

时间:2018-03-26 07:35:02

标签: ios swift bluetooth-lowenergy cbperipheralmanager

我正在尝试在两个设备(两个iPhone)之间发送数据(图像)。 此代码用于通告的CBPeripheralManager:

func peripheralManagerDidUpdateState(_ peripheral: CBPeripheralManager) {

    switch peripheral.state {
    case .unknown:
        print("central.state is .unknown")
    case .resetting:
        print("central.state is .resetting")
    case .unsupported:
        print("central.state is .unsupported")
    case .unauthorized:
        print("central.state is .unauthorized")
    case .poweredOff:
        print("central.state is .poweredOff")
    case .poweredOn:
        print("central.state is .poweredOn")
      updateAdvertisingData()
    }
}

func updateAdvertisingData() {

    if (cameraPeripheralManager.isAdvertising) {
        cameraPeripheralManager.stopAdvertising()
    }
    let advertisementData = String(format: "%@", "advertisementData")

            char = CBMutableCharacteristic(type: CHAR_UUID, properties: [.notify], value: nil, permissions: [.readable])
            myRoei = CBMutableService(type: RX_UUID, primary: true)
            myRoei.characteristics = [char]
            cameraPeripheralManager.add(myRoei)
            cameraPeripheralManager.startAdvertising([CBAdvertisementDataServiceUUIDsKey:[RX_UUID], CBAdvertisementDataLocalNameKey: advertisementData])
}
   func peripheralManager(_ peripheral: CBPeripheralManager, central: CBCentral, didSubscribeTo characteristic: CBCharacteristic) {
    print("didSubscribeTo")
            if let img = UIImage(named: "maiden") {
                let data = UIImagePNGRepresentation(img)
            self.sendData(data: data!)
            }
}

func sendData(data: Data){

    data.withUnsafeBytes { (u8Ptr: UnsafePointer<UInt8>) in
        let mutRawPointer = UnsafeMutableRawPointer(mutating: u8Ptr)
        let uploadChunkSize = 20
        let totalSize = data.count
        var offset = 0
        while offset < totalSize {
            let chunkSize = offset + uploadChunkSize > totalSize ? totalSize - offset : uploadChunkSize
            let chunk = Data(bytesNoCopy: mutRawPointer+offset, count: chunkSize, deallocator: Data.Deallocator.none)
            offset += chunkSize
            print("The offset is: + \(offset)")
            print("Total size is: + \(totalSize)")
           cameraPeripheralManager.updateValue(chunk, for: char, onSubscribedCentrals: nil)
        }
    }
}

在CBCentralManager中,我使用的是didUpdateValueFor特征,它始终为零。

func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
    print(characteristic.value as Any)
    switch characteristic.uuid {
    case CHAR_UUID:
        print("Char value: \(String(describing: characteristic.value))")
    case RX_UUID: break
    //
    default:
        print("Unhandled Characteristic UUID: \(characteristic.uuid)")
    }
}

我做错了什么?

0 个答案:

没有答案