Ios 如果外围设备出现问题，则循环

我正在处理外围扫描仪，我有中频环路的问题。 我得到错误：“for语句中的预期条件”和“带括号的语句块是未使用的闭包”。这就是这个循环：

func peripheral(peripheral: CBPeripheral!, didDiscoverServices error: NSError!)
{
    if let servicePeripheral = peripheral.services as? [CBService]
    {
       for peripheral.services in CBService
        {
        println("\(servicePeripheral)")
        }
    }
}

---

您的

for

循环格式不正确。你有：

for <some existing value> in <a data type> {
}

for <new variable> in <some collection> {
}

func peripheral(peripheral: CBPeripheral!, didDiscoverServices error: NSError!)
{
    if let servicePeripherals = peripheral.services as? [CBService]
    {
        for servicePeripheral in servicePeripherals
        {
            println("\(servicePeripheral)")
        }
    }
}