获得"这个类不符合关键值的关键值编码." 请求RestKit loadObjectsAtResourcePath时

Question

我正在尝试使用RestKit的RKObjectManager将JSON数据反序列化到我的iPhone应用程序中.

我目前的问题是应用程序崩溃了:

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<Course 0x6e71b10> valueForUndefinedKey:]: this class is not key value coding-compliant for the key id.'

我打电话的时候:

[manager loadObjectsAtResourcePath:@"/courses" delegate:nil];

我的域类 - Course.h看起来像

#import <Foundation/Foundation.h>



@interface Course : NSObject  {

}

@property(nonatomic) NSInteger *id;

@property(nonatomic, retain) NSString *name;

-(id)initWithIdAndName: (NSInteger *)inId inName:(NSString *)inName;
@end

而Course.m看起来像

#import "Course.h"
#import "NSDictionary+RKAdditions.h"


@implementation Course {

}
@synthesize name = _name;
@synthesize id = _id;

- (id)initWithIdAndName:(NSInteger *)inId inName:(NSString *)inName {
    _name = inName;
    _id = inId;
    return self;

}

#pragma mark NSCoding Protocol


- (void)encodeWithCoder:(NSCoder *)encoder;
{
[encoder encodeInteger:[self id] forKey:@"id"];
[encoder encodeObject:[self name] forKey:@"name"];
}

- (id)initWithCoder:(NSCoder *)decoder;
{
if ( ![super init] )
    return nil;

[self setId:[decoder decodeIntForKey:@"id"]];
[self setName:[decoder decodeObjectForKey:@"name"]];


return self;
}

@end 

从服务器检索的Json数据是

{"courses":[{"id":1,"name":"course 1"},{"id":2,"name":"course 2"}]}

并使用以下代码调用RKObjectManager:

RKObjectMapping* courseMapping = [RKObjectMapping mappingForClass:[Course class]];
[courseMapping mapKeyPath:@"id" toAttribute:@"id"];
[courseMapping mapKeyPath:@"name" toAttribute:@"name"];


RKObjectManager *manager = [RKObjectManager objectManagerWithBaseURL:@"http://firstbit/of/url"];

[manager.mappingProvider setMapping:courseMapping forKeyPath:@"courses"];
[manager loadObjectsAtResourcePath:@"/endpoint" delegate:nil];

关于这个的任何想法？

Answer 1

我得到了同样的错误,虽然我的问题只是忘记在使用CoreData更改测试时使用@synthesize删除@dynamic指令.

Answer 2

它可能会帮助其他人,但我有这个问题,原因是我在我的对象定义中使用NSInteger.RestKit无法映射到NSInteger,只能映射到NSNumber.