第一次启动：

2016-03-20 08:15:25.799 chicun[1825:12913521] application didFinishLaunchingWithOptions

2016-03-20 08:15:25.827 chicun[1825:12913521] viewDidLoad

2016-03-20 08:15:25.830 chicun[1825:12913521] applicationDidBecomeActive

2016-03-20 08:15:25.837 chicun[1825:12913521] viewDidAppear

进入后台：

2016-03-20 08:17:41.032 chicun[1825:12913521] applicationWillResignActive

2016-03-20 08:17:41.857 chicun[1825:12913521] applicationDidEnterBackground

从后台进入前台：

2016-03-20 08:18:21.790 chicun[1825:12913521] applicationWillEnterForeground

2016-03-20 08:18:22.314 chicun[1825:12913521] applicationDidBecomeActive