小编San*_*eja的帖子

我是Core Data的新手,因此我不确定我是否犯了错误.我从REST API下载了一些数据,并成功将JSON响应保存到磁盘.我正在尝试处理数据并使用Core Data持久保存数据.

NSLog(@"inserted objects: %@", [managedObjectContext insertedObjects]);
    [managedObjectContext performBlockAndWait:^{
        NSError *error = nil;
        if (![managedObjectContext save:&error]) {
            NSLog(@"Unable to save context for class %@", className);
        } else {
            NSLog(@"saved all records!");
        }
    }];

我已成功处理JSON并将其添加到NSManagedObjectContext.在第一行中,它显示我已成功尝试插入2个对象.

inserted objects: {(
    <User: 0xa259af0> (entity: User; id: 0xa259b70 <x-coredata:///User/t44BB97D0-C4B4-4BA6-BD25-13CEFDAE665F3> ; data: {
    email = "vishnu@vishnuprem.com";
    experience = "2013-07-20";
    "first_name" = Vishnu;
    id = 2;
    "job_title" = Developer;
    "last_name" = Prem;
    location = "";
    "phone_number" = "+6590091516";
    "profile_pic" …