ios - CBCentralManager iOS10和iOS9

因此，我正在迁移到iOS10，但是我还需要我的代码才能在iOS9上运行。我正在使用CoreBluetooth和CBCentralManagerDelegate。我可以让我的代码在iOS10上运行，但是我也需要后备才能在iOS9上运行。

func centralManagerDidUpdateState(_ central: CBCentralManager) {
    if #available(iOS 10.0, *) {
        switch central.state{
        case CBManagerState.unauthorized:
            print("This app is not authorised to use Bluetooth low energy")
        case CBManagerState.poweredOff:
            print("Bluetooth is currently powered off.")
        case CBManagerState.poweredOn:
            print("Bluetooth is currently powered on and available to use.")
        default:break
        }
    } else {

        // Fallback on earlier versions
        switch central.state{
        case CBCentralManagerState.unauthorized:
            print("This app is not authorised to use Bluetooth low energy")
        case CBCentralManagerState.poweredOff:
            print("Bluetooth is currently powered off.")
        case CBCentralManagerState.poweredOn:
            print("Bluetooth is currently powered on and available to use.")
        default:break
        }
    }
}

我得到了错误:

Enum case 'unauthorized' is not a member of type 'CBManagerState'

在线上:

case CBCentralManagerState.unauthorized:

以及.poweredOff和.poweredOn。

有什么想法可以使它在两种情况下都能正常工作吗？

最佳答案

您可以简单地省略枚举类型名称，而只需使用.value。由于基础原始值兼容，因此可以在没有警告的情况下进行编译，并且可以在iOS 10及更早版本上使用。

func centralManagerDidUpdateState(_ central: CBCentralManager) {
        switch central.state{
        case .unauthorized:
            print("This app is not authorised to use Bluetooth low energy")
        case .poweredOff:
            print("Bluetooth is currently powered off.")
        case .poweredOn:
            print("Bluetooth is currently powered on and available to use.")
        default:break
        }
}