Bluetooth does not work after upgrading to iOS 8

[willSapgreen]

To whom it may concern,
After upgrading to iOS 8, the device cannot find each other.
But if connecting with WiFi, the device can.
Do you have this issue?
Thank you.

[jdiehl]

Sorry for the late answer. Is this still an issue or did you resolve this somehow?

[willSapgreen]

Hello jdiehl,
can you reopen this issue?
Because I still cannot make two device connect through Bluetooth in iOS9.1.
And I am still digging in the root cause.
Thank you.

[vjjjv]

For me this reproduced on iOS10 also. The solution was to enable ipv6 for AsyncServer and AsyncConnection like this:

    // set up listening socket
    _listenSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:AsyncNetworkDispatchQueue()];
    [self.listenSocket setIPv6Enabled:YES];

This thread discusses the similar issue and gives evidence that this really might be the correct solution:
https://forums.developer.apple.com/thread/62306

[jdiehl]

Does this patch resolve the issue?

[vjjjv]

Yes, that works for us on iOS9 and iOS10 at least.

[chiahsien]

@jdiehl Could you update to a new version and the CocoaPods spec for this?