NSManagedObject獲取器/設置器無法識別的選擇器錯誤

我收到以下錯誤。我不明白爲什麼，因爲latitude和longitude在執行文件中有@dynamic，並且它們不是保留字（據我所知）。我在使用核心數據RestKit。NSManagedObject獲取器/設置器無法識別的選擇器錯誤

if ([ObservationSite count:nil] == 0) 
{ 
    for (int i = 1; i <= 5; i++) 
    { 
     NSLog(@"Creating observation site #%i", i); 
     ObservationSite *site = [ObservationSite object]; 
     site.observationSiteID = [NSNumber numberWithInt:i]; 
     site.name = [NSString stringWithFormat:@"James's Place #%i", i, nil]; 
     site.address = @"Somewhere"; 
     site.latitude = [NSNumber numberWithDouble:30.3605+i]; 
     site.longitude = [NSNumber numberWithDouble:-96.1852+i]; 
     [[[RKObjectManager sharedManager] objectStore] save]; 
    } 
} 

NSFetchRequest *fetchRequest = [ObservationSite fetchRequest]; 
NSArray *sites = [[ObservationSite objectsWithFetchRequest:fetchRequest] retain]; 
for (ObservationSite *site in sites) 
{ 
    NSLog(@"Name: %@", site.name); 
    NSLog(@"Address: %@", site.address); 
    NSLog(@"Latitude: %@", site.latitude); 
    NSLog(@"Longitude: %@", site.longitude); 
}

ObservationSite頭文件：

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


@interface ObservationSite : NSManagedObject <MKAnnotation> 
{ 
    CLLocationCoordinate2D _coordinate; 
    NSString *_title; 
    NSString *_subtitle; 
} 

@property (nonatomic, retain) NSNumber *observationSiteID; 
@property (nonatomic, retain) NSNumber *latitude; 
@property (nonatomic, retain) NSNumber *longitude; 
@property (nonatomic, retain) NSString *address; 
@property (nonatomic, retain) NSString *name; 

+ (ObservationSite *)mapAnnotation; 
+ (ObservationSite *)mapAnnotationWithCoordinate:(CLLocationCoordinate2D)coordinate; 
+ (ObservationSite *)mapAnnotationWithCoordinate:(CLLocationCoordinate2D)coordinate title:(NSString *)title; 
+ (ObservationSite *)mapAnnotationWithCoordinate:(CLLocationCoordinate2D)coordinate title:(NSString *)title subtitle:(NSString *)subtitle; 

@end

ObservationSite實現文件：導致錯誤

2011-11-06 18:12:23.428 Dark Sky Finder[19407:11903] Creating observation site #1 
2011-11-06 18:12:23.431 Dark Sky Finder[19407:11903] -[ObservationSite setLatitude:]: unrecognized selector sent to instance 0x735fdf0 
2011-11-06 18:12:23.431 Dark Sky Finder[19407:11903] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ObservationSite setLatitude:]: unrecognized selector sent to instance 0x735fdf0'

代碼

#import "ObservationSite.h" 

@implementation ObservationSite 

@synthesize coordinate = _coordinate; 
@synthesize title = _title; 
@synthesize subtitle = _subtitle; 

@dynamic observationSiteID; 
@dynamic latitude; 
@dynamic longitude; 
@dynamic address; 
@dynamic name; 

+ (ObservationSite *)mapAnnotation { 
    return [[[self alloc] init] autorelease]; 
} 

+ (ObservationSite *)mapAnnotationWithCoordinate:(CLLocationCoordinate2D)coordinate { 
    return [self mapAnnotationWithCoordinate:coordinate title:nil subtitle:nil]; 
} 

+ (ObservationSite *)mapAnnotationWithCoordinate:(CLLocationCoordinate2D)coordinate title:(NSString *)title { 
    return [self mapAnnotationWithCoordinate:coordinate title:title subtitle:nil]; 
} 

+ (ObservationSite *)mapAnnotationWithCoordinate:(CLLocationCoordinate2D)coordinate title:(NSString *)title subtitle:(NSString *)subtitle { 
    ObservationSite *annotation = [[[self alloc] init] autorelease]; 
    annotation.coordinate = coordinate; 
    annotation.title = title; 
    annotation.subtitle = subtitle; 
    return annotation; 
} 

@end

來源

2011-11-07 James Skidmore

哎呦 - 屬性名我在ObservationSite頭文件/實現文件中使用的數據模型與之不同。我現在將它們重命名爲相同的，並且工作正常。

來源

2011-11-07 00:34:45

NSManagedObject獲取器/設置器無法識別的選擇器錯誤

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