didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
applicationWillResignActive
background前调用applicationDidEnterBackground
background调用applicationWillEnterForeground
active前调用applicationDidBeconeActive
active调用applicationWillTerminate
not runing(关闭)前调用启动应用：
didFinishLaunchingWithOptions:(NSDictionary *)launchOptionsapplicationDidBeconeActive在应用内单击home：
applicationWillResignActiveapplicationDidEnterBackground应用在后台运行，再次打开应用：
applicationWillEnterForegroundapplicationDidBeconeActive双击home选择当前应用：
applicationWillResignActiveapplicationDidBeconeActive双击home选择其它应用：
applicationWillResignActiveapplicationDidEnterBackground双击home关闭应用：
applicationWillResignActiveapplicationDidEnterBackgroundapplicationWillTerminate
原文地址：http://blog.csdn.net/ishaoc/article/details/42143841
