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Editorial Team
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Asked: 2026-05-26T22:51:56+00:00

I’m writing an iPhone app. When the app is running and the iPhone is

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I’m writing an iPhone app. When the app is running and the iPhone is charging, there is no need to lock the iPhone. Is it possible to prevent the locking of the iPhone when the device is charging and my app is running?

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1 Answer

  1. Editorial Team

    You can subscribe to UIDeviceBatteryStateDidChangeNotification notification to get the moment when your iphone begins/stops to charge. Then in case iphone is charging you can set idleTimerDisabled property in UIApplication object to YES to prevent device to go to sleep:

    [[NSNotificationCenter defaultCenter] addObserver:self 
                                         selector:@selector(updateBatteryState:) 
                             name:UIDeviceBatteryStateDidChangeNotification 
                                           object:nil];


- (void) updateBatteryState:(NSNotification*)notification{
    [UIApplication sharedApplication].idleTimerDisabled = 
         ([UIDevice currentDevice].batteryState == UIDeviceBatteryStateCharging);
}

    P.S. If user decides to put device to sleep with sleep/wake button there’s no way to prevent him of doing so

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