#pragma mark - CoreDataAbout
 
- (void)saveContext
{
    NSError* error = nil;
    NSManagedObjectContext *managedObjectContext = self.managedObjectContext;
    if (managedObjectContext != nil) {
        if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {
            NSLog(@"Unresolved error :%@, %@", error, [error userInfo]);
            abort();
        }else{
            NSLog(@"save success!");
        }
    }
}
 
- (NSURL*)applicationDocDir
{
    NSURL* url = [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask]lastObject];
    NSLog(@"%@", [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]);
    
    return url;
}
 
// 后缀为.xcdatamodeld的包，里面是.xcdatamodel文件，用数据模型编辑器编辑
// 编译后为.momd或.mom文件
- (NSManagedObjectModel*)managedObjectModel
{
    if (_managedObjectModel != nil) {
        return _managedObjectModel;
    }
    
    NSURL* modelURL = [[NSBundle mainBundle] URLForResource:@"Journal" withExtension:@"momd"];
    NSLog(@"model url: %@", [modelURL path]);
    self.managedObjectModel = [[NSManagedObjectModel alloc] initWithContentsOfURL:modelURL];
    
    return self.managedObjectModel;
}
 
- (NSManagedObjectContext*)managedObjectContext
{
    if (_managedObjectContext != nil) {
        return _managedObjectContext;
    }
    
    NSPersistentStoreCoordinator* coordinator = [self persistentStoreCoordinator];
    
    if (coordinator != nil) {
        self.managedObjectContext = [[NSManagedObjectContext alloc]init];
        [self.managedObjectContext setPersistentStoreCoordinator:coordinator];
    }
    
    return self.managedObjectContext;
}
 
- (NSPersistentStoreCoordinator*)persistentStoreCoordinator
{
    if (_persistentStoreCoordinator != nil) {
        return _persistentStoreCoordinator;
    }
    
    NSURL* storeUrl = [[self applicationDocDir] URLByAppendingPathComponent:@"Journal.sqlite"];
    
    NSError* error = nil;
    self.persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
    
    if (![self.persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:nil error:&error]) {
        NSLog(@"Error: %@, %@", error, [error userInfo]);
    }
    
    return self.persistentStoreCoordinator;
}

+ (void) setupCoreDataStack;
+ (void) setupAutoMigratingCoreDataStack;
+ (void) setupCoreDataStackWithInMemoryStore;
+ (void) setupCoreDataStackWithStoreNamed:(NSString *)storeName;
+ (void) setupCoreDataStackWithAutoMigratingSqliteStoreNamed:(NSString *)storeName;

[MagicalRecord cleanUp];

// 当从相册里选择一张照片或者用相机进行拍摄之后，该方法被调用
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage];
    NSLog(@"SMILE!");
    [self.capturedImages addObject:image];

    if ([self.cameraTimer isValid])
    {
        return;
    }
    
    if (self.imagePickerController.sourceType == UIImagePickerControllerSourceTypeCamera)
    {
        
        UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
    }
    

    [self finishAndUpdate];
}

- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo
{
    UIAlertView *alert;
    
    if (error)
    {
        alert = [[UIAlertView alloc] initWithTitle:@"错误"
                                           message:@"保存失败"
                                          delegate:self cancelButtonTitle:@"确定"
                                 otherButtonTitles:nil];
    }
    else
    {
        alert = [[UIAlertView alloc] initWithTitle:@"成功"
                                           message:@"保存成功"
                                          delegate:self cancelButtonTitle:@"确定"
                                 otherButtonTitles:nil];
    }
    [alert show];
}

    NSLog(@"HostName: %@", [[NSProcessInfo processInfo] hostName]);
    //globallyUniqueString 唯一的标示符，每次调用都会不一样，可以用作一些临时缓存文件的名字
    NSLog(@"GlobalUniqueString: %@", [[NSProcessInfo processInfo] globallyUniqueString]);
    //操作系统名称
    NSLog(@"OperatingSystemName: %@", [[NSProcessInfo processInfo] operatingSystemName]);
    //操作系统版本
    NSLog(@"OperatingSystemVersion: %@", [[NSProcessInfo processInfo] operatingSystemVersionString]);
    //物理内存
    NSLog(@"PhysicalMem: %llu", [[NSProcessInfo processInfo] physicalMemory]);
    //进程名称
    NSLog(@"ProcessName: %@", [[NSProcessInfo processInfo] processName]);
    
    //供应商标识
    NSLog(@"UniqueId: %@", [UIDevice currentDevice].identifierForVendor);
    //设备类型（iPhone、iPad）
    NSLog(@"userInterfaceIdiom: %d", [UIDevice currentDevice].userInterfaceIdiom);
    //设备名字
    NSLog(@"Name: %@", [UIDevice currentDevice].name);
    //系统名字
    NSLog(@"SystemName: %@", [UIDevice currentDevice].systemName);
    //系统版本
    NSLog(@"SystemVersion: %@", [UIDevice currentDevice].systemVersion);
    //模型
    NSLog(@"Model: %@", [UIDevice currentDevice].model);
    //本地化的模型
    NSLog(@"LocalizeModel: %@", [UIDevice currentDevice].localizedModel);
    //电池状态
    NSLog(@"BatteryLevel: %f", [UIDevice currentDevice].batteryLevel);
    
//2014-07-03 16:52:01.055 CityOfHeart[3528:60b] HostName: dounen
//2014-07-03 16:52:01.058 CityOfHeart[3528:60b] GlobalUniqueString: B4B1EC8C-A805-434B-9D57-106ED70C214A-3528-00000AF6A42D73D7
//2014-07-03 16:52:01.059 CityOfHeart[3528:60b] OperatingSystemName: NSMACHOperatingSystem
//2014-07-03 16:52:01.061 CityOfHeart[3528:60b] OperatingSystemVersion: Version 7.1.1 (Build 11D201)
//2014-07-03 16:52:01.063 CityOfHeart[3528:60b] PhysicalMem: 1035976704
//2014-07-03 16:52:01.064 CityOfHeart[3528:60b] ProcessName: CityOfHeart
//2014-07-03 16:52:01.074 CityOfHeart[3528:60b] UniqueId: <__NSConcreteUUID 0x16693c80> 5ACF8DA1-FAC1-4D70-AB1F-BB696188C5CA
//2014-07-03 16:52:01.075 CityOfHeart[3528:60b] userInterfaceIdiom: 0
//2014-07-03 16:52:01.157 CityOfHeart[3528:60b] Name: 童年
//2014-07-03 16:52:01.159 CityOfHeart[3528:60b] SystemName: iPhone OS
//2014-07-03 16:52:01.161 CityOfHeart[3528:60b] SystemVersion: 7.1.1
//2014-07-03 16:52:01.162 CityOfHeart[3528:60b] Model: iPad
//2014-07-03 16:52:01.163 CityOfHeart[3528:60b] LocalizeModel: iPad
//2014-07-03 16:52:01.165 CityOfHeart[3528:60b] BatteryLevel: -1.000000

typedef NS_ENUM(NSInteger, UIUserInterfaceIdiom) {
#if __IPHONE_3_2 <= __IPHONE_OS_VERSION_MAX_ALLOWED
    UIUserInterfaceIdiomPhone,           // iPhone and iPod touch style UI
    UIUserInterfaceIdiomPad,             // iPad style UI
#endif
};