1 Reply
      Latest reply on Sep 11, 2016 7:03 AM by eskimo
      balram1990 Level 1 Level 1 (0 points)



        I am using NetworkExtension framwork for getting the list of all the available wifi's SSID. I am using below code:

                let bundleId = NSBundle.mainBundle().bundleIdentifier!

                var options:Dictionary<String, NSObject> = Dictionary(minimumCapacity: 1)

                options[kNEHotspotHelperOptionDisplayName] = Constants.kDescriptionWiFiAnnotation

                let queue:dispatch_queue_t = dispatch_queue_create(bundleId, DISPATCH_QUEUE_CONCURRENT)

                let _ = NEHotspotHelper.registerWithOptions(options, queue: queue, handler: {(command) -> Void in

                    switch command.commandType {

                    case .FilterScanList:   

                       //adding ssids to a local variable here

                  //handled other cases as well



        But this code is casuing crash sometimes. I'm not sure what is wrong here. Here is the crash report:

        #9. Crashed: App's Bundle Identifier here

        0 App Name              0x1be324 __hidden#12577_ (__hidden#12751_)

        1 App Name               0x1bc87c __hidden#12577_ (__hidden#12751_:192)

        2  NetworkExtension               0x2ff717ed __53+[NEHotspotHelper registerWithOptions:queue:handler:]_block_invoke + 72

        3  CaptiveNetwork                 0x2a603033 __CNPluginHandleCommandInfo_block_invoke + 26

        4  libdispatch.dylib              0x238b3cbf _dispatch_call_block_and_release + 10

        5  libdispatch.dylib              0x238bc6d5 _dispatch_async_redirect_invoke + 1368

        6  libdispatch.dylib              0x238bf6a1 _dispatch_root_queue_drain + 1572

        7  libdispatch.dylib              0x238bf07b _dispatch_worker_thread3 + 94

        8  libsystem_pthread.dylib        0x23a52e0d _pthread_wqthread + 1024

        9  libsystem_pthread.dylib        0x23a529fc start_wqthread + 8


        It doesn't provide any other information. Can anyone please let me know what is wrong here.

        This crash was not there ealier, it is happening after recent iOS updates.


        Thanks in advance.

        • Re: NEHotspotHelper registerWithOptions:queue:handler:] is causing crash randomly
          eskimo Apple Staff Apple Staff (13,875 points)

          This is crashing within your code (as clearly indicated by frames 0 and 1 in the backtrace you posted).  It’s hard to say what’s going on without a symbolicated backtrace.  Did you redact the symbols from the backtrace (that is, replace them with __hidden)?  Or is that an artefact of the crash reporting tool you’re using?

          ps You wrote:

          I am using NetworkExtension framwork for getting the list of all the available wifi's SSID.

          If you’re only objective is to get a list of SSIDs, you’re on the wrong path here.  You might want to read this post, and its associated thread, for context.

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