iOS exit app friendly code snippet

iOS exit app friendly

- (IBAction)logOutButton:(id)sender
{
	//show confirmation message to user
	CustomAlert* alert = [[CustomAlert alloc] initWithTitle:@"Confirmation" message:@"Do you want to exit?" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
	alert.style = AlertStyleWhite;
	[alert setFontName:@"Helvetica" fontColor:[UIColor blackColor] fontShadowColor:[UIColor clearColor]];
	[alert show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

	if (buttonIndex != 0)  // 0 == the cancel button
	{
    	//home button press programmatically
		  UIApplication *app = [UIApplication sharedApplication];
    	[app performSelector:@selector(suspend)];
    	//wait 2 seconds while app is going background
    	[NSThread sleepForTimeInterval:2.0];
    	//exit app when app is in background
    	NSLog(@"exit(0)");
    	exit(0);
	}
}