Can Iphone restore the state of app after [[UIApplication sharedApplication] openURL:[NSURL URLWithString:call_url]];

In my Iphone app I give a button wh开发者_JAVA百科en pressed calls a specific number using the following function call and uses the native iphone call app.

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:call_url]]; where call_url is of the form tel://

Once the call is done, is there a way to restore and open my Iphone App as it was before calling ?

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No. Your process has been terminated. You'll have to depend on the user to start your app again and you have to restore the state yourself.