如何在ios swift中连接低功耗蓝牙？

我想连接 ble 外设。 但我的代码没有调用 didConect 函数

这是我的代码：

func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
 let device = (advertisementData as NSDictionary)
            .object(forKey: CBAdvertisementDataLocalNameKey)
            as? NSString

        if device?.contains(BEAN_NAME) == true {

            print("Did discover peripheral", peripheral)

            self.bluetoothManager.stopScan()
            self._peripheral = peripheral
            self._peripheral.delegate = self
            central.connect(peripheral, options: nil)
        }
}


func centralManager( central: CBCentralManager, didConnect peripheral: CBPeripheral) { //cant call this
        print("connected to \(BEAN_NAME)")
        peripheral.discoverServices(nil)
    }

Logs :

BLE service is powered on
Did discover peripheral <CBPeripheral: 0x1740eef00, identifier = 4872623B-F872-443A-8A96-F4E1F84D6841, name = GoDoor in  :), state = disconnected>

我创建了一个演示项目，它扫描蓝牙 LE 设备并将它们显示在列表中：

在github上查看一下：快速/蓝牙扫描仪.ios

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