Ios 使用未声明的标识符核心数据实体子类（NSManaged对象）

我在核心数据方面相当新，sry。我的核心数据实体有一个子类“CachedWeatherDataEntity”，它派生自NSManagedObject。我导入协议“WeatherDataCache”中的“CachedWeatherDataEntity.h”-文件。该协议定义了保存/获取数据的方法，并将核心数据设置为“核心功能”。但是现在编译器在相应的实现“WeatherDataCacheImpl”中找不到我的实体。错误在代码的末尾。此应用程序基于

CachedWeatherDataEntity.h

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


@interface CachedWeatherDataEntity : NSManagedObject

@property (nonatomic, retain) NSNumber * airHumidity;
@property (nonatomic, retain) NSNumber * airPressure;
@property (nonatomic, retain) NSDate * dateTime;
@property (nonatomic, retain) NSNumber * illuminance;
@property (nonatomic, retain) NSNumber * precipitation;
@property (nonatomic, retain) NSNumber * radiation1;
@property (nonatomic, retain) NSNumber * radiation2;
@property (nonatomic, retain) NSDate * sunDown;
@property (nonatomic, retain) NSDate * sunUp;
@property (nonatomic, retain) NSNumber * temperature;
@property (nonatomic, retain) NSNumber * windDirection;
@property (nonatomic, retain) NSNumber * windSpeed;

@end

#import <Foundation/Foundation.h>
#import "WeatherDataSet.h"
#import "CachedWeatherDataEntity.h"

@protocol WeatherDataCache <NSObject>

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

- (id<WeatherDataSet>) getData:(NSDate*)pDateTime;

- (void) saveDataArray:(NSMutableArray*)pDataArray;

- (void) saveData:(id<WeatherDataSet>)pData;

- (void)saveContext;

- (NSURL *)applicationDocumentsDirectory;
@end

#import  <Foundation/Foundation.h>
#import "WeatherDataCache.h"
#import "WeatherDataSetImpl.h"

@interface WeatherDataCacheImpl : NSObject <WeatherDataCache> {

}
@end

WeatherDataCache.h

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


@interface CachedWeatherDataEntity : NSManagedObject

@property (nonatomic, retain) NSNumber * airHumidity;
@property (nonatomic, retain) NSNumber * airPressure;
@property (nonatomic, retain) NSDate * dateTime;
@property (nonatomic, retain) NSNumber * illuminance;
@property (nonatomic, retain) NSNumber * precipitation;
@property (nonatomic, retain) NSNumber * radiation1;
@property (nonatomic, retain) NSNumber * radiation2;
@property (nonatomic, retain) NSDate * sunDown;
@property (nonatomic, retain) NSDate * sunUp;
@property (nonatomic, retain) NSNumber * temperature;
@property (nonatomic, retain) NSNumber * windDirection;
@property (nonatomic, retain) NSNumber * windSpeed;

@end

#import <Foundation/Foundation.h>
#import "WeatherDataSet.h"
#import "CachedWeatherDataEntity.h"

@protocol WeatherDataCache <NSObject>

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

- (id<WeatherDataSet>) getData:(NSDate*)pDateTime;

- (void) saveDataArray:(NSMutableArray*)pDataArray;

- (void) saveData:(id<WeatherDataSet>)pData;

- (void)saveContext;

- (NSURL *)applicationDocumentsDirectory;
@end

#import  <Foundation/Foundation.h>
#import "WeatherDataCache.h"
#import "WeatherDataSetImpl.h"

@interface WeatherDataCacheImpl : NSObject <WeatherDataCache> {

}
@end

#导入
#导入“WeatherDataSet.h”
#导入“CachedWeatherDataEntity.h”
@协议数据缓存
@属性（只读、强、非原子）NSManagedObjectContext*managedObjectContext；
@属性（只读、强、非原子）NSManagedObjectModel*managedObjectModel；
@属性（只读、强、非原子）NSPersistentStoreCoordinator*persistentStoreCoordinator；
-（id）getData:（NSDate*）pDateTime；
-（void）saveDataArray:（NSMutableArray*）pDataArray；
-（void）saveData：（id）pData；
-（无效）保存上下文；
-（NSURL*）申请文件目录；
@结束

WeatherDataCacheImpl.h

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


@interface CachedWeatherDataEntity : NSManagedObject

@property (nonatomic, retain) NSNumber * airHumidity;
@property (nonatomic, retain) NSNumber * airPressure;
@property (nonatomic, retain) NSDate * dateTime;
@property (nonatomic, retain) NSNumber * illuminance;
@property (nonatomic, retain) NSNumber * precipitation;
@property (nonatomic, retain) NSNumber * radiation1;
@property (nonatomic, retain) NSNumber * radiation2;
@property (nonatomic, retain) NSDate * sunDown;
@property (nonatomic, retain) NSDate * sunUp;
@property (nonatomic, retain) NSNumber * temperature;
@property (nonatomic, retain) NSNumber * windDirection;
@property (nonatomic, retain) NSNumber * windSpeed;

@end

#import <Foundation/Foundation.h>
#import "WeatherDataSet.h"
#import "CachedWeatherDataEntity.h"

@protocol WeatherDataCache <NSObject>

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

- (id<WeatherDataSet>) getData:(NSDate*)pDateTime;

- (void) saveDataArray:(NSMutableArray*)pDataArray;

- (void) saveData:(id<WeatherDataSet>)pData;

- (void)saveContext;

- (NSURL *)applicationDocumentsDirectory;
@end

#import  <Foundation/Foundation.h>
#import "WeatherDataCache.h"
#import "WeatherDataSetImpl.h"

@interface WeatherDataCacheImpl : NSObject <WeatherDataCache> {

}
@end

#导入
#导入“WeatherDataCache.h”
#导入“WeatherDataSetImpl.h”
@接口WeatherDataCacheImpl:NSObject{
}
@结束

WeatherDataCacheImpl.m+++这里是错误+++

#import "WeatherDataCacheImpl.h"
#import "CachedWeatherDataEntity.h"


@implementation WeatherDataCacheImpl

@synthesize managedObjectContext = _managedObjectContext;
@synthesize managedObjectModel = _managedObjectModel;
@synthesize persistentStoreCoordinator = _persistentStoreCoordinator;


- (id<WeatherDataSet>) getData:(NSDate*)pDateTime {

    return nil;
}

- (void) saveDataArray:(NSMutableArray*)pDataArray {

    double temp = 23.3;
    double air = 95.0;
    NSDate *myDate = [[NSDate alloc]init];




    NSManagedObjectContext *context = [self managedObjectContext];
    CachedWeatherDataEntity *CachedWeatherDataEntity = [NSEntityDescription
                                      insertNewObjectForEntityForName:@"CachedWeatherDataEntity"
                                      inManagedObjectContext:context];
    CachedWeatherDataEntity.temperature = [NSNumber numberWithDouble:temp];
    CachedWeatherDataEntity.airHumidity = [NSNumber numberWithDouble:air];
    CachedWeatherDataEntity.dateTime = myDate;



    NSError *error;
    if (![context save:&error]) {
        NSLog(@"Whoops, couldn't save: %@", [error localizedDescription]);
    }

    // Test listing all CachedWeatherDataEntitys from the store
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
    NSEntityDescription *entity = [NSEntityDescription entityForName:@"CachedWeatherDataEntity"
                                              inManagedObjectContext:context];
    [fetchRequest setEntity:entity];
    NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];



    for (CachedWeatherDataEntity *info in fetchedObjects) { <-----------Use of undeclared identifier 'info'

        NSLog(@"temp: %@", info.temp);        
        NSLog(@"air: %@", info.air);
    }
}

#导入“WeatherDataCacheImpl.h”
#导入“CachedWeatherDataEntity.h”
@WeatherDataCacheImpl的实现
@综合managedObjectContext=_managedObjectContext；
@综合managedObjectModel=_managedObjectModel；
@合成persistentStoreCoordinator=\u persistentStoreCoordinator；
-（id）getData:（NSDate*）pDateTime{
返回零；
}
-（void）saveDataArray:（NSMutableArray*）pDataArray{
双温=23.3；
双空气=95.0；
NSDate*myDate=[[NSDate alloc]init]；
NSManagedObjectContext*上下文=[self-managedObjectContext]；
CachedWeatherDataEntity*CachedWeatherDataEntity=[N实体描述
insertNewObjectForEntityForName:@“CachedWeatherDataEntity”
inManagedObjectContext:context]；
CachedWeatherDataEntity.temperature=[NSNumber numberWithDouble:temp]；
CachedWeatherDataEntity.air湿度=[NSNumber numberWithDouble:air]；
CachedWeatherDataEntity.dateTime=myDate；
n错误*错误；
如果（！[上下文保存：&错误]）{
NSLog（@“哎哟，无法保存：%@，[error localizedDescription]）；
}
//测试列出存储区中的所有CachedWeatherDataEntity
NSFetchRequest*fetchRequest=[[NSFetchRequest alloc]init]；
NSEntityDescription*entity=[NSEntityDescription entityForName:@“CachedWeatherDataEntity”
inManagedObjectContext:context]；
[FetchRequestSetEntity:entity]；
NSArray*fetchedObjects=[context executeFetchRequest:fetchRequest错误：&error]；
对于（FetchedObject中的CachedWeatherDataEntity*信息）{至少存在一个问题：

CachedWeatherDataEntity *CachedWeatherDataEntity = ...

因为局部变量与类具有相同的名称。您应该重命名
变量，例如小写：

CachedWeatherDataEntity *cachedWeatherDataEntity = ...

我通常将我的核心数据方法放在我的AppDelegate中，以便视图和控制器可以访问它们。你在苹果的开发网站上看到CoreDataBooks或ThreadedCoreData示例了吗？最后，你用这个名字称呼你的实体，但你在CachedWeather上调用*info…对吗？你试过“entity.info.temp”吗？不是舒尔。我真的应该看看这些书，因为越快我就需要实体来显示图表并放大它们以获得更多细节……是的，这很有效。以前重构太多了。这就是原因。非常感谢！