程序启动流程

- (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];  
      
}