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Re: Services empty when didDiscoverServices triggered

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Re: Services empty when didDiscoverServices triggered

Subject: Re: Services empty when didDiscoverServices triggered
From: András Kövi <email@hidden>
Date: Mon, 16 Sep 2013 12:10:09 +0200

I guess you mixed up the method signatures a little bit. :)

I haven't seen this issue yet but core bluetooth's internal state or the peripheral's misbehavior can either be the source. Based on what you described this is undecidable.

You should prepare a small example project that can be used to reproduce the issue. Describe the exact way you test and include detailed the logs. You should submit a bug report to get more attention from Apple's engineers (who will most probably ask you to do just what I described).

Regards,

Andras

2013/9/16 Chen, Liang (IS) <email@hidden>

This issue happens on iOS 6 and iOS7.
Usually when services of peripheral are discovered, the method:

- (void)discoverCharacteristics:(NSArray *)characteristicUUIDs
forService:(CBService *)service

will get called.

Then we call the
- (void)peripheral:(CBPeripheral *)peripheral didDiscoverServices:(NSError
*)error
method to discover the characteristics.

But in my app, the peripheral.services is sometimes empty(This happens
occasionally, but it's bothering since the characteristics cannot be
found).
The worse part is that when the peripheral is in this state, it's services
keeps empty until I kill the peripheral app(an iOS app too) and restart
the app again.

From the aspect of usability, we shouldn't tell the user that "You should
kill the app and restart it and try again" right?

Has anyone seen this issue when you develop a central app?
And I'm not sure if it's a iOS issue or my app's issue.

Any engineer from Apple can answer my question? I'll be really appreciated.

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References:
	>Services empty when didDiscoverServices triggered (From: "Chen, Liang (IS)" <email@hidden>)

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