iphone - Detect if device is charging

Question

I can't find anything definite using my favourite tool, however I thought I would put it out here...

Is there a way, using the iPhone SDK, for an app to detect if the device is in a state of receiving power (charging, dock, etc.)?

I would like to be able to disable the idleTimer automatically if the device is receiving power (otherwise it is a user-specified setting).

Answer 1

You are better off using:

[[UIDevice currentDevice] setBatteryMonitoringEnabled:YES];

if ([[UIDevice currentDevice] batteryState] != UIDeviceBatteryStateUnplugged) {
      [UIApplication sharedApplication].idleTimerDisabled=YES;
    }

This is because you have to concern yourself with two different states - one is that the battery is charging, and the other when it is fully charged.

If you really wanted to be complete about it - you would register to receive battery monitoring notifications, so you could re-enable the idle timer if the user disconnected main power, etc.