Apple

Just call scanForPeripheralsWithServices while the app is in the foreground and scanning will continue when the app is moved to the background.

Thanks,

Joakim

On Jul 30, 2012, at 7:12 PM, email@hidden wrote:

Hi Joakim

Thank you for your reply.

Additional question is how to scan the BLE device  in background.

Thanks advance.

zz_zhang

发件人： Joakim Linde

发送时间： 2012-07-31 07:16

收件人： zz_zhang99

抄送： bluetooth-dev

主题： Re: scan BLE device in background

Hi zz_zhang,

The "bluetooth-central" keyword gives the application the right to handle Bluetooth specific events while in the background. It does not give the app a generic permission to run in the background. Meaning, NSTimers will not work when the app is in the background.

Thanks,

Joakim

On Jul 30, 2012, at 12:18 AM, email@hidden wrote:

Hi,

How to scan BLE device in background?

I schedule a NSTimer to call scan function. But the timer event is not called when app in the background.

I have added the "bluetooth-central"  to UIBackgroundModes in the app's info.plist. And my app run well in background when receives a notificaion form peripheral.

Thanks advance.

zz_zhang
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References:
	>scan BLE device in background (From: "email@hidden" <email@hidden>)
	>Re: scan BLE device in background (From: Joakim Linde <email@hidden>)
	>回复: Re: scan BLE device in background (From: "email@hidden" <email@hidden>)
	>Re: 回复: Re: scan BLE device in background (From: Joakim Linde <email@hidden>)