iphone applicationWillResignActive

didFinishLaunchingWithOptions 이 먼저 실행 되어 필요한 모든 정보를 로드한 후 

applicationWillResignActive가 실행된다.

슬립모드에서 복귀 되면 applicationWillResignActive가 실행된다.

Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.

Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.