IOS 蓝牙未发现外围服务。 (有时!)

Question

有时，我的应用程序将连接到外围设备(即调用“didConnectPeripheral”)但它不会发现可用服务(不调用“didDiscoverServices”)。此外，当发生这种情况时，外围设备(基于 nRF8001 的 Adafruit Bluefruit)会说它未连接!这种情况只发生在应用程序启动次数的大约 1/5 时。

下面的代码块总是被执行:

func centralManager(central: CBCentralManager!, didDiscoverPeripheral peripheral: CBPeripheral!, advertisementData: [NSObject : AnyObject]!, RSSI: NSNumber!) {
     //Connect to the peripheral if its a UART
    if(peripheral.name == "UART") {
        currentPeripheral = peripheral
        currentPeripheral.delegate = self
        central.connectPeripheral(currentPeripheral, options: nil) 
    }
}


 func centralManager(central: CBCentralManager!, didConnectPeripheral peripheral: CBPeripheral!) {
    println()
    println("Connected to: \(peripheral.name)")
    peripheral.discoverServices(nil)
    connectionStatus = .Connected
    central.stopScan()
    println("***Stopped scanning***")
}

知道为什么不调用“didDiscoverServices”吗？

(我在第 5 代 iPod touch 上运行该应用程序)

Answer 1

根据CoreBluetooth programming guide ，你应该这样做:

Before you begin interacting with the peripheral, you should set the peripheral’s delegate to ensure that it receives the appropriate callbacks, like this:

peripheral.delegate = self;

因此，您的 didConnectPeripheral 函数应该如下所示:

func centralManager(central: CBCentralManager!, didConnectPeripheral peripheral: CBPeripheral!) {
        NSLog("peripheral connected")
        peripheral.delegate = self
        peripheral.discoverServices(nil)

    }