Добавление основных данных в существующий проект iPhone - PullRequest
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Добавление основных данных в существующий проект iPhone

138 голосов
/ 09 января 2010

Я хотел бы добавить основные данные в существующий проект iPhone, но я все еще получаю много ошибок компиляции: 

- NSManagedObjectContext undeclared

 - Expected specifier-qualifier-list before 'NSManagedObjectModel'

 - ...

Я уже добавил Core Data Framework к цели (щелкните правой кнопкой мыши намой проект в «Цели», «Добавить» - «Существующие фреймворки», «CoreData.framework»).

Мой заголовочный файл: 

NSManagedObjectModel *managedObjectModel;
NSManagedObjectContext *managedObjectContext;       
NSPersistentStoreCoordinator *persistentStoreCoordinator;

[...]

@property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;

Чего мне не хватает?Запуск нового проекта не вариант ...

Большое спасибо!

edit извините, у меня есть эти реализации ... но похоже на библиотекуотсутствует ... методы реализации полны с ошибкой компиляции, такой как "managedObjectContext undeclared", "NSPersistentStoreCoordinator undeclared", но также с "Expected ')" до NSManagedObjectContext "(хотя кажется, что круглые скобки верны)... 

#pragma mark -
#pragma mark Core Data stack

/**
 Returns the managed object context for the application.
 If the context doesn't already exist, it is created and bound to the persistent store         
coordinator for the application.
 */
- (NSManagedObjectContext *) managedObjectContext {

    if (managedObjectContext != nil) {
        return managedObjectContext;
    }

    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
    if (coordinator != nil) {
        managedObjectContext = [[NSManagedObjectContext alloc] init];
        [managedObjectContext setPersistentStoreCoordinator: coordinator];
    }
    return managedObjectContext;
}


/**
 Returns the managed object model for the application.
 If the model doesn't already exist, it is created by merging all of the models found in    
 application bundle.
 */
- (NSManagedObjectModel *)managedObjectModel {

    if (managedObjectModel != nil) {
        return managedObjectModel;
    }
    managedObjectModel = [[NSManagedObjectModel mergedModelFromBundles:nil] retain];    
    return managedObjectModel;
}


/**
 Returns the persistent store coordinator for the application.
 If the coordinator doesn't already exist, it is created and the application's store added to it.
 */
- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {

    if (persistentStoreCoordinator != nil) {
        return persistentStoreCoordinator;
    }

    NSURL *storeUrl = [NSURL fileURLWithPath: [[self applicationDocumentsDirectory] 
        stringByAppendingPathComponent: @"Core_Data.sqlite"]];

    NSError *error = nil;
    persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] 
    initWithManagedObjectModel:[self managedObjectModel]];
    if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType 
    configuration:nil URL:storeUrl options:nil error:&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. If it is not possible to recover from the error, display an alert panel that 
    instructs the user to quit the application by pressing the Home button.

     Typical reasons for an error here include:
     * The persistent store is not accessible
     * The schema for the persistent store is incompatible with current managed object 
                model
     Check the error message to determine what the actual problem was.
     */
    NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
    abort();
}    

return persistentStoreCoordinator;
}

Ответы [ 13 ]

0 голосов
/ 11 февраля 2017

view.h 

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

    @interface ViewController :  
    UIViewController<UITableViewDataSource,UITableViewDelegate>

   @property (weak, nonatomic) IBOutlet UITableView *coreDataList;
   - (IBAction)addBtnClick:(id)sender;
   @property (strong, nonatomic) NSMutableArray *dataList;
   @end

detail.h 

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

 @interface DetailViewController : UIViewController<UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UITextField *nameTxt;
@property (weak, nonatomic) IBOutlet UITextField *mobileTxt;
@property (weak, nonatomic) IBOutlet UITextField *emailIdTxt;
 - (IBAction)saveBtnClick:(id)sender;
@property (strong,nonatomic) NSManagedObject *userData;

@end
0 голосов
/ 01 февраля 2017

образец кодирования view1 

#import "ViewController.h"
#import "DetailViewController.h"

 @interface ViewController ()
 {
  NSInteger indexPathvalue;
 }
 @end

  @implementation ViewController

 - (NSManagedObjectContext *)managedObjectContext {
     NSManagedObjectContext *context = nil;
     id delegate = [[UIApplication sharedApplication] delegate];
     if ([delegate performSelector:@selector(managedObjectContext)]) {
       context = [delegate managedObjectContext];
     }
   return context;
  }

  - (void)viewDidLoad {
      [super viewDidLoad];
  // Do any additional setup after loading the view, typically from a nib.
    NSLog(@"call this one2");
 }

 - (void)viewDidAppear:(BOOL)animated
 {
   [super viewDidAppear:animated];
   NSManagedObjectContext *managedObjectContext = [self 
   managedObjectContext];
   NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] 
   initWithEntityName:@"Details"];
   self.dataList = [[managedObjectContext executeFetchRequest:fetchRequest   
   error:nil] mutableCopy];
   [_coreDataList reloadData];

    NSLog(@"call this one");
 }
    #pragma mark - Table view data source

   - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
   {
     return 1;
   }

     - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
   (NSInteger)section
    {
    return self.dataList.count;
    }

   - (UITableViewCell *)tableView:(UITableView *)tableView 
   cellForRowAtIndexPath:(NSIndexPath *)indexPath
   {
   static NSString *CellIdentifier = @"Cell";
   UITableViewCell *cell = [tableView     
   dequeueReusableCellWithIdentifier:CellIdentifier];

     if (cell == nil)
    {
    cell = [[UITableViewCell   
    alloc]initWithStyle:UITableViewCellStyleSubtitle 
    reuseIdentifier:CellIdentifier];
    }

   NSManagedObject *user = [self.dataList objectAtIndex:indexPath.row];
   cell.textLabel.text = [user valueForKey:@"name"];
      cell.detailTextLabel.text = [user valueForKey:@"mobileNumber"];
    cell.imageView.image = [UIImage imageWithData:[user
    valueForKey:@"imageView"]]; 
    return cell;
    }


    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:
    (NSIndexPath *)indexPath
    {
    indexPathvalue = indexPath.row;
    [self performSegueWithIdentifier:@"detailView" sender:self];
    }

     - (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:
    (NSIndexPath *)indexPath
    {
     return YES;
     }
     - (void)tableView:(UITableView *)tableView commitEditingStyle:
      (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:
     (NSIndexPath *)indexPath
    {
    NSManagedObjectContext *context = [self managedObjectContext];
    if (editingStyle == UITableViewCellEditingStyleDelete)
    {
    [context deleteObject:[self.dataList objectAtIndex:indexPath.row]];
    NSError *error = nil;
    if (![context save:&error]) {
        NSLog(@"Can't Delete! %@ %@", error, [error localizedDescription]);
        return;
    }
    [self.dataList removeObjectAtIndex:indexPath.row];
    [_coreDataList reloadData];

     }

    }
   - (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    }

   - (IBAction)addBtnClick:(id)sender {
    }


    #pragma mark - Navigation

    // In a storyboard-based application, you will often want to do a little      
    - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
     {
   // Get the new view controller using [segue destinationViewController].
   // Pass the selected object to the new view controller.
    if ([segue.identifier isEqualToString:@"detailView"])
   {
    NSManagedObject *obj = [self.dataList objectAtIndex:indexPathvalue];
    DetailViewController *detail = segue.destinationViewController;
    detail.userData = obj;
    }

    }
   @end

образец подробного представления 

       #import "DetailViewController.h"

       @interface DetailViewController ()

       @end

       @implementation DetailViewController

      - (NSManagedObjectContext *)managedObjectContext {
     NSManagedObjectContext *context = nil;
     id delegate = [[UIApplication sharedApplication] delegate];
     if ([delegate performSelector:@selector(managedObjectContext)]) {
    context = [delegate managedObjectContext];
     }
     return context;
    }

    - (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
     if (self.userData) {
    [self.nameTxt setText:[self.userData valueForKey:@"name"]];
    [self.mobileTxt setText:[self.userData valueForKey:@"mobileNumber"]];
    [self.emailIdTxt setText:[self.userData valueForKey:@"email"]];
    }
    }

     - (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
    }


   - (BOOL)textFieldShouldReturn:(UITextField *)textField
   {
    [textField resignFirstResponder];
    return YES;




}
     /*

SaveButton 

    - (IBAction)saveBtnClick:(id)sender {

     NSManagedObjectContext *context = [self managedObjectContext];

     if (self.userData) {
    // Update existing data
    [self.userData setValue:self.nameTxt.text forKey:@"name"];
    [self.userData setValue:self.mobileTxt.text forKey:@"mobileNumber"];
    [self.userData setValue:self.emailIdTxt.text forKey:@"email"];
    UIImage *sampleimage = [UIImage imageNamed:@"icon.png"];
    NSData *dataImage = UIImageJPEGRepresentation(sampleimage, 1.0);
    [self.userData setValue:dataImage forKey:@"imageView"];

     } else {
    // Create a new data
    NSManagedObject *newDevice = [NSEntityDescription   
    insertNewObjectForEntityForName:@"Details" 
    inManagedObjectContext:context];
    [newDevice setValue:self.nameTxt.text forKey:@"name"];
    [newDevice setValue:self.mobileTxt.text forKey:@"mobileNumber"];
    [newDevice setValue:self.emailIdTxt.text forKey:@"email"];
    UIImage *sampleimage = [UIImage imageNamed:@"icon.png"];
    NSData *dataImage = UIImageJPEGRepresentation(sampleimage, 1.0);
    [newDevice setValue:dataImage forKey:@"imageView"];

     }

     NSError *error = nil;
    // Save the object to persistent store
     if (![context save:&error]) {
    NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
    }

    [self dismissViewControllerAnimated:YES completion:nil];
    }
   @end
0 голосов
/ 15 декабря 2016 
+(void) insetPlusUpdate:(NSDictionary *)dataa {

    NSManagedObjectContext * context;

    if (![[NSThread currentThread] isMainThread]) {

        context = [[NSManagedObjectContext alloc] init];

        [context setPersistentStoreCoordinator:[APP_DELEGATE persistentStoreCoordinator]];
    } else {

        context = [APP_DELEGATE managedObjectContext];
    }

    NSFetchRequest * request = [[NSFetchRequest alloc] init];

    NSEntityDescription * entity = [NSEntityDescription entityForName:@"EntityName" inManagedObjectContext:context];

    [request setEntity:entity];

    NSPredicate * check = [NSPredicate predicateWithFormat:@"attribute == %@", Dict[@"key"]];

    [request setPredicate:check];

    NSError * error = nil;

    if ([context countForFetchRequest:request error:&error] == 0) {

Entity.attribute = @"";

    } else {


        NSArray * array = [context executeFetchRequest:request error:&error];

        EntityName * entity = [array firstObject];

  Entity.attribute = @"";

    }

}

+(NSString *)fetch:(NSString *)feed_id{

    NSManagedObjectContext * context;

    if(![[NSThread currentThread] isMainThread]){

        context = [[NSManagedObjectContext alloc] init];

        [context setPersistentStoreCoordinator:[APP_DELEGATE persistentStoreCoordinator]];

    } else {

        context = [APP_DELEGATE managedObjectContext];

    }

    NSFetchRequest * request = [[NSFetchRequest alloc] init];

    NSEntityDescription * entity = [NSEntityDescription entityForName:@"ENTITYNAME" inManagedObjectContext:context];

    [request setEntity:entity];

   NSPredicate * check = [NSPredicate predicateWithFormat:@"attribute == %@", Dict[@"key"]];

    [request setPredicate:check];

    NSError * error = nil;

    if ([context countForFetchRequest:request error:&error] > 0) {

        NSArray * array = [context executeFetchRequest:request error:&error];

        ENTITYNAME * fetchData = [array firstObject];

        NSString * string = fetchData.attribte[@"key"];

        return string;
    }

    return nil;
}


+(BOOL)delete{

    NSManagedObjectContext * context;

    if (![[NSThread currentThread] isMainThread]) {

        context = [[NSManagedObjectContext alloc] init];

        [context setPersistentStoreCoordinator:[APP_DELEGATE persistentStoreCoordinator]];

    } else {

        context = [APP_DELEGATE managedObjectContext];

    }

    NSFetchRequest * request = [[NSFetchRequest alloc] init];

    NSEntityDescription * entity = [NSEntityDescription entityForName:@"ENTITYNAME" inManagedObjectContext:context];

    [request setEntity:entity];

    NSError *error = nil;

    NSBatchDeleteRequest *deleteRequest = [[NSBatchDeleteRequest alloc] initWithFetchRequest: request];

    @try{

        [context executeRequest:deleteRequest error:&error];
        if([context save:&error]){

            NSLog(@"Deleted");

            return [context save:&error];

        }
        else{

            return [context save:&error];
        }

    }
    @catch(NSException *exception){

        NSLog(@"failed %@",exception);
        return [context save:&error];
    }    


}
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