Comments on: Detecting when Bluetooth is disabled with GKSession

By: Jesse

Jesse — Tue, 17 Nov 2009 09:54:27 +0000

Yeah, even if both Bluetooth and WiFi are off, and the device has Airplane mode enabled, we still don’t get an error. I did notice that with WiFi off and Bluetooth enabled that in Apple’s Reachability example wrapper that it detects an adhoc link local route, but only once you’ve actually created the GKSession and have connected to another device.

By: Matthew

Matthew — Tue, 10 Nov 2009 15:48:17 +0000

I think the reason you don’t get the error on 3.1 is because gamekit now works over WiFi. Thus it is not an “error” if bluetooth is turned off.

By: Hannes

Hannes — Sat, 19 Sep 2009 08:26:41 +0000

Indeed, doesn’t seem to work in 3.1. Hope we can find a workaround.

By: Cliff

Cliff — Wed, 16 Sep 2009 18:47:30 +0000

Guys, I have submitted a Radar report (7228802) to Apple about this. My wish would be that we would not have to worry about whether Bluetooth was on. Instead, we could simply start a GKSession, and Apple would ask users if they want to allow a Bluetooth connection– similar to how they handle Location Manager requests.

By: Frank

Frank — Wed, 16 Sep 2009 12:49:58 +0000

Thanks for the update. I don’t know offhand how to make this work in 3.1. I’ll be looking into it over the weekend and will update when I know more.

By: Marcus

Marcus — Wed, 16 Sep 2009 10:18:43 +0000

I have the same Problem as Cliff.
Any idea why?

By: Cliff

Cliff — Mon, 14 Sep 2009 19:19:18 +0000

Thanks, John. Unfortunately, this technique seems to no longer work in iPhone OS 3.1 as didFailWithError seems to never get called anymore for this situation.

By: Frank

Frank — Thu, 27 Aug 2009 14:38:56 +0000

Thanks John, glad you found it useful.

The only way to turn on Bluetooth from an app is through GKPeerPickerController, which will prompt the user if it sees Bluetooth is off. There is no way to get at this behavior alone, you have to use the whole Apple-provided GKPeerPickerController UI.

There is no way to turn Bluetooth off from an app.

By: John

John — Thu, 27 Aug 2009 02:43:04 +0000

First, I wanted to say thank you for this great post!
I have question about GameKit framework.
Is there a way to disable or turn off the bluetooth with GameKit or any other available framework?

I would appreciate it if you have any info on this.

Thanks again,
John