ios - Swift 中对成员下标错误的不明确引用

Question

var centralManager: CBCentralManager!

@nonobjc func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
    **if let centralManagerIdentifiers = launchOptions?[UIApplicationLaunchOptionsBluetoothCentralsKey]** {
        NSLog("UIApplicationLaunchOptionsBluetoothCentralsKey = \(centralManagerIdentifiers)")
    }

我在执行 CentralManagerIdentifiers 的可选绑定(bind)时遇到错误， 谁能帮我这个？

Answer 1

swift 3.0

试试这个。

if let centralManagerIdentifiers = launchOptions?[UIApplicationLaunchOptionsKey.bluetoothCentrals] {
            NSLog("UIApplicationLaunchOptionsBluetoothCentralsKey = \(centralManagerIdentifiers)")
        }