NOT show the last screen when launching iOS App

Question

My app has a feature that, when enabled, presents a “decoy” screen whenever the app is launched. The user then has to tap in a “secret knock” to dismiss the decoy screen and see the password screen.

The problem is, when the app is launched, a split second before the decoy screen is presented, the screen that was active before the app was suspended is shown. It’s shown for just a split second, but depending on what the user was previously doing, it can be awkward. Anyway, this little “glitch” practically defeats the whole purpose of the decoy screen.

The app is a free download, so if you have an iOS device, please download the app and activate the decoy feature on the options screen to see what I’m trying to say here.

And finally, to the question...

Is there a way to not have the app present the last active screen when it’s launched? I want the decoy screen to be the first thing to come up whenever the app is launched... without that split second of the previous content.

I know I can set the UIApplicationExitsOnSuspend to YES on the plist file to work around the problem. But that would force the app to quit and not suspend. I would really like to keep the suspend feature working.

Hope I made it clear enough...

Answer 1

You should implement

- (void)applicationDidEnterBackground:(UIApplication *)application

Inside this method you will do whatever you need to present the decoy screen on top of the last active screen.

For more information on this, check the documentation