Differentiate between screen lock and home button press on iOS7

Question

I need to do something in applicationDidEnterBackground. But I need to differentiate which user action causes the \"enter background\": screen lock or home butt

Answer 1

This solution was taken from this answer and worked for me. It is a bit hacky but it makes it easier to be accepted on the appstore because it doesn't use com.apple.springboard.lockcomplete or com.apple.springboard.lockstate.

The following code goes into your AppDelegate:

func applicationDidEnterBackground(_ application: UIApplication) {
    if (DidUserPressLockButton()) {
        print("User pressed lock button")
    } else {
        print("user pressed home button")
    }
}

private func DidUserPressLockButton() -> Bool {
    let oldBrightness = UIScreen.main.brightness
    UIScreen.main.brightness = oldBrightness + (oldBrightness <= 0.01 ? (0.01) : (-0.01))
    return oldBrightness != UIScreen.main.brightness
}

The idea is to try changing the brightness of the screen after the application went to background and to check if this change was successful.

Disclaimer: it doesn't work on the simulator and you will have to test it on a real device.