iOS 13 - 如何检查用户是否接受了蓝牙权限？

Question

作为 iOS 13 的一部分，应用现在需要请求权限才能访问蓝牙。

如何检查用户是否接受了蓝牙权限？

Answer 1

CBCentralManager extends CBManager. As of iOS 13, CBManager has an authorization 属性.

使用此属性确定权限是未知、允许、拒绝还是受限。

需要说明的是，在iOS下，需要使用实例属性authorization，而不是同名类型属性。确保在 CBCentralManager.

的实例上访问 authorization

Answer 2

Swift 5 IOS 13：基于已接受的答案，但处理外设连接类型:

    enum BluetoothConnectionType {
        case central, peripheral
    }

    func isBluetoothAuthorized(forType type: BluetoothConnectionType) -> Bool {
        switch type {
        case .central:
            if #available(iOS 13.1, *) { return CBCentralManager.authorization == .allowedAlways }
            if #available(iOS 13.0, *) { return CBCentralManager().authorization == .allowedAlways }
            return true
        case .peripheral:
            if #available(iOS 13.1, *) { return CBPeripheralManager.authorization == .allowedAlways }
            if #available(iOS 13.0, *) { return CBPeripheralManager.authorizationStatus() == .authorized }
            return true
        }
    }

Answer 3

有趣的是，启动iOS 13.1可以在不分配CBManager的情况下检查BT权限。这是一个巨大的优势，因为初始化 CBManager 将自动触发系统弹出窗口，以防 BT 权限之前不是 asked/given。

func checkPermission() -> CBManagerAuthorization {
    if #available(iOS 13.1, *) {
        return checkPermissionBeforeCBManagerAllocation()
    } else {
        return checkPermissionLegacy()
    }
}

@available(iOS 13.1, *)
private func checkPermissionBeforeCBManagerAllocation() -> CBManagerAuthorization {
    CBCentralManager.authorization
}

private func checkPermissionLegacy() -> CBManagerAuthorization {
    let manager = CBCentralManager(delegate: self, queue: nil)
    return manager.authorization
}

以上只是 iOS 13.x 版本的示例，不处理低于该版本的任何内容。

Answer 4

试试这个：

var isBluetoothPermissionGranted: Bool {
    if #available(iOS 13.1, *) {
        return CBCentralManager.authorization == .allowedAlways
    } else if #available(iOS 13.0, *) {
        return CBCentralManager().authorization == .allowedAlways
    }
    
    // Before iOS 13, Bluetooth permissions are not required
    return true
}

Answer 5

这是我要使用的（针对所有 iOS 的完整解决方案）：Swift 5

class MainViewController: UIViewController {
    var isiOSBluetoothOn = false
       
    @IBAction func onBluetoothButtonClicked(_ sender: Any){
        if (isiOSBluetoothOn) {
            let newVC = self.storyboard?.instantiateViewController(withIdentifier: "blevc")
            self.navigationController?.pushViewController(newVC!, animated: true)
        } else {
            if #available(iOS 13.0, *) {
                if (CBCentralManager().authorization != .allowedAlways) {   //System will automatically ask user to turn on iOS system Bluetooth if this returns false
                   openAppOrSystemSettingsAlert(title: "Bluetooth permission is currently disabled for the application. Enable Bluetooth from the application settings.", message: "")
                }
            } else {
                let appName = Bundle.main.infoDictionary?["CFBundleName"] as? String
                openAppOrSystemSettingsAlert(title: "\"\(appName ?? "You Application Nam")\" would like to use Bluetooth for new connections", message: "You can allow new connections in Settings")
            }
        }
    }
                
    func openAppOrSystemSettingsAlert(title: String, message: String) {
        let alertController = UIAlertController (title: title, message: message, preferredStyle: .alert)
        let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in
            guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else { return }
            if UIApplication.shared.canOpenURL(settingsUrl) {
                UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                    print("Settings opened: \(success)") // Prints true
                })
            }
        }
        alertController.addAction(settingsAction)
        let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
        alertController.addAction(cancelAction)
        present(alertController, animated: true, completion: nil)
    }
}

extension MainViewController: CBCentralManagerDelegate {
    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        switch central.state {
        case .poweredOn:
           isiOSBluetoothOn = true
            break
        case .poweredOff:
           isiOSBluetoothOn = false
            break
        default:
            break
        }
    }
}

iOS 13 - 如何检查用户是否接受了蓝牙权限？

iOS 13 - How to check if user has accepted Bluetooth permission?

ios

core-bluetooth

这是我要使用的（针对所有 iOS 的完整解决方案）：Swift 5