iphone - 为什么我的特性没有出现在 BLE 广告 Swift 中

Question

我想宣传 iPhone 作为外围设备的一些特征，但是尽管该服务似乎包含使用 BLE 扫描仪查看时不会显示的特征，但该服务工作正常并显示 localNameKey .

谢谢

import UIKit
import CoreBluetooth

class ViewController: UIViewController, CBPeripheralManagerDelegate{

var peripheralManager: CBPeripheralManager!
let myCustomServiceUUID: CBUUID = CBUUID(string: "B5893BC9-63AB-42A5-BB33-EEAE686BED1D")
let myCustomCharacteristic: CBUUID = CBUUID(string: "9BA41369-C5B7-456B-B4E3-BB0A8DFF3A95")
let myCustomCharacteristic2: CBUUID = CBUUID(string: "9BA41369-C5B7-456B-B4E3-BB0A8DFF3A85")
var myService: CBMutableService!
var myCharacteristics: CBMutableCharacteristic!
var myCharacteristics2: CBMutableCharacteristic!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    peripheralManager = CBPeripheralManager(delegate: self, queue: nil)
    myService = CBMutableService(type: myCustomServiceUUID, primary: true)

    myCharacteristics = CBMutableCharacteristic(type: myCustomCharacteristic, properties: CBCharacteristicProperties.Broadcast, value: nil, permissions: CBAttributePermissions.Readable)
    myCharacteristics2 = CBMutableCharacteristic(type: myCustomCharacteristic2, properties: CBCharacteristicProperties.Broadcast, value: nil, permissions: CBAttributePermissions.Readable)

    myService.characteristics = [myCharacteristics, myCharacteristics2]
    peripheralManager.addService(myService)



}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

func peripheralManagerDidUpdateState(peripheral: CBPeripheralManager) {
    if peripheral.state == CBPeripheralManagerState.PoweredOn {
        let dataTobeAdvetised :[String: AnyObject!] = [CBAdvertisementDataServiceUUIDsKey: [myService.UUID], CBAdvertisementDataLocalNameKey: "MY Device"]
        self.peripheralManager.startAdvertising(dataTobeAdvetised)
        print(myService)
        print("It should be working!........")


    } else if peripheral.state == CBPeripheralManagerState.PoweredOff {
        self.peripheralManager.stopAdvertising()
    }
}



}

Answer 1

您无权使用 CBCharacteristic.broadcast 属性值。

来自documentation -

• CBCharacteristicPropertyBroadcast

The characteristic’s value can be broadcast using a characteristic configuration descriptor.

This property is not allowed for local characteristics published via the addService: method of the CBPeripheralManager class. This means that you cannot use this property when you initialize a new CBMutableCharacteristic object via the initWithType:properties:value:permissions: method of the CBMutableCharacteristic class.

您应该根据您的要求使用 CBCharacteristicPropertyRead、CBCharacteristicPropertyWriteWithoutResponse 和 CBCharacteristicPropertyWrite 的某种组合。