手機處於飛行模式時如何檢測iCloud用戶？

Question

首先我知道這個職位：How to identify iCloud logged in user in airplane mode?

雖然它似乎沒有答案。一個答案是關於檢測互聯網連接的問題，另一個答案是關於用戶是否改變了。

這裏是我的代碼：

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) 
      } 
     }) 
    } 

似乎很愚蠢的，你需要一個互聯網連接，看是否有用戶登錄到iCloud中。我怎樣才能解決這個問題？

謝謝！

P.S. 如果那篇文章確實包含了我的問題的答案，請您爲我突出顯示它嗎？我找不到它。乾杯!

Answer 1

飛行模式只是關閉手機和wifi數據功能。在這種情況下，檢查可達性應該與檢測飛行模式的目的相同。這是一個標準庫片段，將檢查是否可達

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) 
}