how to quit (exit) an app in iPhone4 sdk

Question

How can I quit iPhone4 app? When I use exit(0) the app goes in the background. I want to quit the app instead of sending it to the background.

Answer 1

Set UIApplicationExitsOnSuspend in your application's plist. This will cause the app not to go into the background under iOS4 when the user switches to another app.

Then have your app send an openURL: message to Safari when your app wants to exit. When Safari launches, your app will be terminated (by honoring the UIApplicationExitsOnSuspend plist key).

If you point the Safari URL at a web page explaining why your app just stopped running, the user might be less likely to give it a 1-star rating.

Note that this procedure may or may not follow Apple's recommendations, but it does stay within legal public API use (e.g. even some of Apple's example apps launch Safari).