AppDelegate中那几个方法的作用

1、首次运行

//- 程序首次运行- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOpt

//程序重新激活 - (void)applicationDidBecomeActive:(UIApplication *)application

2、首次关闭

// 程序将挂起 - (void)applicationWillResignActive:(UIApplication *)application

// 程序进入后台 - (void)applicationDidEnterBackground:(UIApplication *)application

3、再次运行

//程序进入前台 - (void)applicationWillEnterForeground:(UIApplication *)application

//程序重新激活 - (void)applicationDidBecomeActive:(UIApplication *)application

4、再次关闭

// 程序将挂起 - (void)applicationWillResignActive:(UIApplication *)application

//程序进入后台 - (void)applicationDidEnterBackground:(UIApplication *)application

5、终止程序

//程序将终止 - (void)applicationWillTerminate:(UIApplication*)application