- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
   
    [[OSDocumentManager sharedManager] checkUserICloudPreferenceAndSetupIfNecessary];
     
    return YES;
}
- (void)applicationWillEnterForeground:(UIApplication *)application
{
    
    [[OSDocumentManager sharedManager] performApplicationWillEnterForegroundCheck];
    
}
- (void)applicationDidEnterBackground:(UIApplication *)application
{

    [[OSDocumentManager sharedManager] saveDocument];
    
    
}
- (void)applicationWillTerminate:(UIApplication *)application
{

    [[OSDocumentManager sharedManager] closeDocument];
    
}