Ios 在核心数据中插入数据

这里，在我的核心数据中，两个实体重新注册&唯一，关系名称是roshan，关系是一对一。 我尝试插入数据，但代码太长，任何人都无法帮助创建短代码，以便在核心数据中执行插入数据

- (IBAction)submitData:(id)sender {
    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];

    NSManagedObjectContext *context = [appDelegate manageObjectContext];
    Resgistration *newContact = [NSEntityDescription insertNewObjectForEntityForName:@"Resgistration" inManagedObjectContext:context];
    //newContact = [NSEntityDescription insertNewObjectForEntityForName:@"Resgistration" inManagedObjectContext:context];
    Unique *number = [NSEntityDescription insertNewObjectForEntityForName:@"Unique" inManagedObjectContext:context];

    //number = [NSEntityDescription insertNewObjectForEntityForName:@"Unique" inManagedObjectContext:context];

    [number setValue:_numberText.text forKey:@"number"];
    [number setValue:_studyText.text forKey:@"study"];
    NSMutableSet *roshanSet = [[NSMutableSet alloc] init];
    [roshanSet addObject:number];
    [newContact addRoshan:roshanSet];
    [newContact setValue:number forKey:@"roshan"];
    //[newContact setValue:_numberText.text forKey:@"number"];
    [newContact setValue:_nameText.text forKey:@"name"];
    [newContact setValue:_addressText.text forKey:@"address"];
    [newContact setValue:_emailText.text forKey:@"email"];
    [newContact setValue:_othernoText.text forKey:@"otheNo"];
    [newContact setValue:_hobbyText.text forKey:@"hobby"];
    [newContact setValue:_contactText.text forKey:@"contact"];
    NSError *error;
    [context save:&error];

    _nameText.text = @"";
    _addressText.text = @"";
    _emailText.text = @"";
    _othernoText.text = @"";
    _hobbyText.text = @"";
    _contactText.text = @"";
    _numberText.text = @"";

    TableViewController *table = [self.storyboard instantiateViewControllerWithIdentifier:@"TableViewController"];
    [self.navigationController pushViewController:table animated:YES];
}

Unique+CoreDataClass.h

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@class Resgistration;

NS_ASSUME_NONNULL_BEGIN

@interface Unique : NSManagedObject

@end

NS_ASSUME_NONNULL_END

#import "Unique+CoreDataProperties.h"

import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@class Unique;

NS_ASSUME_NONNULL_BEGIN

@interface Resgistration : NSManagedObject

@end

NS_ASSUME_NONNULL_END

#import "Resgistration+CoreDataProperties.h"

重新注册+CoreDataClass.h

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@class Resgistration;

NS_ASSUME_NONNULL_BEGIN

@interface Unique : NSManagedObject

@end

NS_ASSUME_NONNULL_END

#import "Unique+CoreDataProperties.h"

import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@class Unique;

NS_ASSUME_NONNULL_BEGIN

@interface Resgistration : NSManagedObject

@end

NS_ASSUME_NONNULL_END

#import "Resgistration+CoreDataProperties.h"

---

这是您应该做得更好一点的方法，但首先您需要在类定义中添加这些属性，以便重新注册和唯一，就像在核心数据模型中一样

- (IBAction)submitData:(id)sender {
    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];

    NSManagedObjectContext *context = [appDelegate manageObjectContext];
    Resgistration *newContact = [NSEntityDescription insertNewObjectForEntityForName:@"Resgistration" inManagedObjectContext:context];
    //newContact = [NSEntityDescription insertNewObjectForEntityForName:@"Resgistration" inManagedObjectContext:context];
    Unique *number = [NSEntityDescription insertNewObjectForEntityForName:@"Unique" inManagedObjectContext:context];

    //number = [NSEntityDescription insertNewObjectForEntityForName:@"Unique" inManagedObjectContext:context];

    number.number = _numberText.text;
    number.study = _studyText.text;
    NSMutableSet *roshanSet = [[NSMutableSet alloc] init];
    [roshanSet addObject:number];
    [newContact addRoshan:roshanSet];
    newContact.roshan = number;
    newContact.name = _nameText.text;
    newContact.address = _addressText.text;
    newContact.email = _emailText.text;
    newContact.otheNo = _othernoText.text;
    newContact.hobby = _hobbyText.text;
    newContact.contact = _contactText.text;
    NSError *error;
    [context save:&error];

    if(error == nil)
    {
        _nameText.text = @"";
        _addressText.text = @"";
        _emailText.text = @"";
        _othernoText.text = @"";
        _hobbyText.text = @"";
        _contactText.text = @"";
        _numberText.text = @"";

        TableViewController *table = [self.storyboard instantiateViewControllerWithIdentifier:@"TableViewController"];
        [self.navigationController pushViewController:table animated:YES];
    }
    else
    {
        NSLog("error")
    }
}

---

发布您的唯一和重新注册类代码这是我的NSMAnagedObject子类。检查更新的代码。每个语句都是必需的，没有神奇的方法来减少代码，你可以用这种方式简化语句快乐编码：）嘿，在这个数字中，值并没有插入核心数据。tableview中显示空值。创建另一个问题，并在此处发布TableViewController源代码和共享链接，以便我可以帮助我们。