ios - 转换为Swift 3.0语法后，如何将类型“CBManagerState”的值转换为预期类型“CBCentralManagerState”？

Question

我正在使用CoreBluetooth Central Manager的iOS应用程序上工作。该应用程序按预期运行，直到我更新到xCode8。此更新以某种方式迫使我使用转换管理器将代码从Swift 2.3转换为Swift 3.0。
此后，我收到错误消息“无法将类型“CBManagerState”的值转换为预期的参数类型“CBCentralManagerState”，并且我正在寻找答案，但是由于更新是新的原因，因此没有任何有用的问题或与Swift 3.0或iOS 10.0一起使用的CB蓝牙的文档。

标有星号的线是产生错误的线。

final class BluetoothSerial: NSObject, CBCentralManagerDelegate, CBPeripheralDelegate {
    ....//some code here from HM10 Bluetooth Serial
    var centralManager: CBCentralManager! 
    var state: CBCentralManagerState { get { return centralManager.state } *

    func centralManagerDidUpdateState(_ central: CBCentralManager) {
      //note that "didDisconnectPeripheral" won't be called if BLE is turned off while connected

       connectedPeripheral = nil
       pendingPeripheral = nil

       //send it to the delegate
       delegate.serialDidChangeState(central.state) *
   }
 }

任何帮助表示赞赏。
提前致谢。

Answer 1

这为我编译:

var state: CBCentralManagerState { get { return CBCentralManagerState(rawValue: centralManager.state.rawValue)! }

根据 dev forums:

枚举是二进制兼容的，因此您的代码可以在任何iOS版本上正常运行

我只是在使用状态 centralManagerDidUpdateState函数-但是这样做如下:

switch central.state{
    case .poweredOn:
        NSLog("CoreBluetooth BLE hardware is powered on");
        break
    case .poweredOff:
        NSLog("CoreBluetooth BLE hardware is powered off");
        break;
    case .unauthorized:
        NSLog("CoreBluetooth BLE state is unauthorized");
        break
    case .unknown:
        NSLog("CoreBluetooth BLE state is unknown");
        break;
    case .unsupported:
        NSLog("CoreBluetooth BLE hardware is unsupported on this platform");
        break;
    default:
        break
    }

编译器似乎对此感到满意的(即，从 CBCentralManager中删除前面的 CBCentralManager.poweredOn