Wi-fi sleeps after some time - objective-c

Question

I created application to download files. For downloading i use ASIHTTPRequest. When I start download big file, and lock my device, after some time my download stops, wi-fi disables and i see Edge icon instead of Wi-fi icon. When I unlock my device, Wi-fi icon appears in 1-2 seconds. My application is not in background! How to solve my problem?

maybe 5-10 minutes in locked mode – Timur Mustafaev Oct 18 '11 at 13:23 — Timur Mustafaev, Oct 18 '11 at 13:23

score 4 · Answer 1 · edited May 23 '17 at 12:03

4

Two things come to mind:

Firstly enable persisten wifi connection for you app: My iPhone app needs a persistent network connection...how to specify UIRequiredDeviceCapabilities?

Secondly make the app request background time when it goes into the background so the actual download can continue: Continuing a long running process in the background under iOS4

edited May 23 '17 at 12:03

Community

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answered Oct 16 '11 at 12:29

huesforalice

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Not helped( I've also set the UIRequiresPersistentWiFi to YES – Timur Mustafaev Oct 16 '11 at 14:16

score 2 · Answer 2 · answered Oct 18 '11 at 19:10

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I'm not sure if 10 minutes after locking the device if the app would count as running in the background or not.

I'd at least try enabling background downloading in ASIHTTPRequest:

[request setShouldContinueWhenAppEntersBackground:YES];

It might help and you've nothing to lose :)

answered Oct 18 '11 at 19:10

JosephH

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I've done this already :) In background it works good BUT only when i use phone while downloading. When I lock device wi-fi turns off after 5-10 mins. On the iPad 2 wi-fi works all the time. Even when device is locked. So I think this "feature" cannot be disabled on iPhone, because it saves battery life. – Timur Mustafaev Oct 19 '11 at 08:46

score 0 · Answer 3 · answered Oct 16 '11 at 12:34

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You can also prevent the IPhone to lock the screen. It'll use more battery but will solve your problem:

UIApplication *myApp = [UIApplication sharedApplication];
   myApp.idleTimerDisabled = YES;

answered Oct 16 '11 at 12:34

ppaulojr

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IMHO huesforalice's answer is a better one, but disabling the idle timer can be useful in some circumstances. Remember to re-enable the idle timer or the user may come back to a completely dead device! See also http://stackoverflow.com/questions/1023265/delaying-but-not-disabling-iphone-auto-lock – JosephH Oct 16 '11 at 13:32

Wi-fi sleeps after some time - objective-c

3 Answers3