如何在iOS的核心数据中存储JSON数据

debugcn 发表于 Dev

钦纳

我从JSON获得响应，并将其存储在数组中，并且要将值存储{albumId albumName coverPhotoURL createdDate}在Core Data中，请帮助我。

    (
        {
        albumId = 1;
        albumName = UAE;
        coverPhotoURL = "http://1-dot-digiphoto-01.appspot.com/serve?blob-key=AMIfv95XeG-ii4aKZsUB5w-ClP0QUhJZa-o5BQRvdqArCCwg0Ueb13-wAfmyNHgaDdTaFS152_kXkJg5_9386zlfRCDc3fagW7Ekagdd6_VvJl6IscqNkyvVkXKYAqIRe-KqDMpjG-cW";
        createdDate = "10-Jun-2010 06:11 PM";
        description = "photos took in Dubai";
        lastViewedDate = "10-Jun-2010 06:11 PM";
        modifiedDate = "10-Jun-2010 06:11 PM";
        numberOfPhotos = 10;
       }
   )

谢尔盖·佩卡尔（Sergey Pekar）

您需要创建NSManagedObject的子类并定义所有需要的字段

@interface AlbumInfo : NSManagedObject

@property (nonatomic, retain) NSNumber * albumId;
@property (nonatomic, retain) NSString * albumName;
@property (nonatomic, retain) NSString * coverPhotoURL;
@property (nonatomic, retain) NSDate * createdDate;

@end

那么您需要调用此代码

context = /* Get the NSManagedObject context */

AlbumInfo *item = [NSEntityDescription insertNewObjectForEntityForName:@"AlbumInfo" inManagedObjectContext:context];

item.albumId = @"some value from json";
/* ... so on ...*/

NSError *error = nil;
if (context != nil) {
    if ([managedObjectContext hasChanges] && ![context save:&error]) {
        // Replace this implementation with code to handle the error appropriately.
        // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
    }
}