AppDelegate生命周期回调顺序

1. 应用初次启动：

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

- (void)applicationDidBecomeActive:(UIApplication *)application

2. 连续点击两次Home按钮

- (void)applicationWillResignActive:(UIApplication *)application

3. 在任务栏点击SpringBoard或者按下Home按钮

- (void)applicationDidEnterBackground:(UIApplication *)application

4. 在任务栏中回到app

- (void)applicationDidBecomeActive:(UIApplication *)application

5. 单次点击Home按钮

- (void)applicationWillResignActive:(UIApplication *)application

- (void)applicationDidEnterBackground:(UIApplication *)application

6. 在SpringBoard中重新启动app

- (void)applicationWillEnterForeground:(UIApplication *)application

- (void)applicationDidBecomeActive:(UIApplication *)application

7. 从顶部向下滑动打开通知中心

- (void)applicationWillResignActive:(UIApplication *)application

8. 移除通知中心

- (void)applicationDidBecomeActive:(UIApplication *)application

9. 从底部向上滑动打开控制中心

- (void)applicationWillResignActive:(UIApplication *)application

10. 移除控制中心

- (void)applicationDidBecomeActive:(UIApplication *)application

11. 来电显示

有待调查。