ios - 在 Swift 中创建 NEVPNManager 对象时出现问题

Question

请参阅下面的代码。每当我在运行 iOS 7 的 iPhone 5c 上运行此代码时，我都会在 let manager: NEVPNManager = NEVPNManager.sharedManager() 行上收到 EXC_BAD_ACCESS 错误。

我该如何解决这个问题，或者有解决办法吗？

提前致谢。

let manager: NEVPNManager = NEVPNManager.sharedManager()
    var p = NEVPNProtocolIPSec()
    manager.`protocol` = p

    let pw = "pw";

    p.username = "un"
    p.passwordReference = pw.dataUsingEncoding(NSUTF8StringEncoding)
    p.serverAddress = "server"
    p.authenticationMethod = NEVPNIKEAuthenticationMethod.SharedSecret
    //p.sharedSecretReference = getPasscodeNSData("vpnSharedSecret")
    p.useExtendedAuthentication = true
    p.disconnectOnSleep = false

Answer 1

这是因为 NEVPNManager 是在 iOS8 中添加的，正如您可以在 Apple 文档 NetworkExtension Changes 中看到的那样

iOS 8.0 API Diffs

NEVPNManager.h (Added)

Added NEVPNManager

Added NEVPNManager.connection

Added NEVPNManager.enabled

Added -[NEVPNManager loadFromPreferencesWithCompletionHandler:]

Added NEVPNManager.localizedDescription

Added NEVPNManager.onDemandEnabled

Added NEVPNManager.onDemandRules

Added NEVPNManager.protocol

Added -[NEVPNManager removeFromPreferencesWithCompletionHandler:]

Added -[NEVPNManager saveToPreferencesWithCompletionHandler:]

Added +[NEVPNManager sharedManager]

Added NEVPNConfigurationChangeNotification

Added NEVPNError

Added NEVPNErrorConfigurationDisabled

Added NEVPNErrorConfigurationInvalid

Added NEVPNErrorConfigurationStale

Added NEVPNErrorConnectionFailed

Added NEVPNErrorDomain

Added #def NEVPN_EXPORT