ios4 - in iphone 4 which method call when we close application -

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i want know method call when in iphone , application close , again open.

in iphone4 malty task felicity available . want background , foreground method application.

- (void)applicationdidenterbackground:(uiapplication *)application

when user quits application supports background execution.

and 

- (void)applicationwillenterforeground:(uiapplication *)application

method called part of transition background inactive state. can use method undo many of changes made application upon entering background.


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