iOS APP各种状态（进入后台，前台等）

整理：http://www.jianshu.com/p/096bdd17449e

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

// Override point for customization after application launch.

NSLog(@"\n ===> 程序开始 !");

return YES;

}

- (void)applicationWillResignActive:(UIApplication *)application

{

NSLog(@"\n ===> 程序暂行 !");

}

- (void)applicationDidEnterBackground:(UIApplication *)application

{

NSLog(@"\n ===> 程序进入后台 !");

}

- (void)applicationWillEnterForeground:(UIApplication *)application

{

NSLog(@"\n ===> 程序进入前台 !");

}

- (void)applicationDidBecomeActive:(UIApplication *)application

{

NSLog(@"\n ===> 程序重新激活 !");

}

- (void)applicationWillTerminate:(UIApplication *)application

{

NSLog(@"\n ===> 程序意外暂行 !");

UIDevice *device = [UIDevice currentDevice];

}

首次运行：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

- (void)applicationDidBecomeActive:(UIApplication *)application

首次关闭（home）：

- (void)applicationWillResignActive:(UIApplication *)application

- (void)applicationDidEnterBackground:(UIApplication *)application

再次运行：

- (void)applicationWillEnterForeground:(UIApplication *)application

- (void)applicationDidBecomeActive:(UIApplication *)application

再次关闭：

- (void)applicationWillResignActive:(UIApplication *)application

- (void)applicationDidEnterBackground:(UIApplication *)application