ios - 手机处于飞行模式时如何检测 iCloud 用户？

Question

首先我知道这篇文章:How to identify iCloud logged in user in airplane mode?

但似乎没有答案。一个答案涉及检测互联网连接，另一个答案涉及用户是否已更改。

这是我的代码:

container.accountStatusWithCompletionHandler{
        (status: CKAccountStatus, error: NSError?) in

        dispatch_async(dispatch_get_main_queue(), {

            var title: String!
            var message: String!

            if error != nil{
                title = "Error"
                message = "An error occurred = \(error)"
            } else {
                //title = "No errors occurred getting info"
                switch status{
                case .Available:
                    message = "The user is logged in to iCloud"
                    title = "GOOD"
                    print("determined status was available")
                    self.shouldPullFromICloud()
                    //self.displayAlertWithTitle(title, message: message)
                case .CouldNotDetermine:
                    message = "Could not determine if the user is logged" +
                    " into iCloud or not"
                    title = "BAD"
                    self.noUserIsSignedIn()
                case .NoAccount:
                    message = "User is not logged into iCloud"
                    title = "BAD"
                    self.noUserIsSignedIn()
                case .Restricted:
                    message = "Could not access user's iCloud account information"
                    title = "BAD"
                    self.noUserIsSignedIn()
                }
                print(title, message)
            }
        })
    }

您需要互联网连接才能查看用户是否登录 iCloud，这似乎很愚蠢。我该如何解决这个问题？

谢谢!

附注如果其他帖子确实包含了我的问题的答案，您可以帮我突出显示吗？我找不到它。干杯!

Answer 1

飞行模式只是关闭蜂窝和 WiFi 数据功能。在这种情况下，检查可达性应与检测飞行模式具有相同的目的。这是一个标准的库片段，用于检查可达性:

func connectedToNetwork() -> Bool {
    var zeroAddress = sockaddr_in()
    zeroAddress.sin_len = UInt8(sizeofValue(zeroAddress))
    zeroAddress.sin_family = sa_family_t(AF_INET)

    guard let defaultRouteReachability = withUnsafePointer(&zeroAddress, {
        SCNetworkReachabilityCreateWithAddress(nil, UnsafePointer($0))
    }) else {
        return false
    }
    var flags : SCNetworkReachabilityFlags = []

    if SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags) == false {
        return false
    }

    let isReachable = flags.contains(.Reachable)
    let needsConnection = flags.contains(.ConnectionRequired)
    return (isReachable && !needsConnection)
}