RESTKit的问题，无法正确映射

时间：2013-01-02 11:29:29

标签： iphone ios restkit

我正在学习RESTKit，我正在学习this教程，这是根据以前版本的RESTKit，并且在v0.20.0中有很多变化，所以我正在阅读有关新版本并做同样的事情任务与教程一样。

现在映射存在问题，我花了很多时间没有成功。我得到的错误是：

error: Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 "No response descriptors match the response loaded." UserInfo=0x758d320 {NSErrorFailingURLStringKey=https://api.foursquare.com/v2/venues/search?client_id=<client id>&client_secret=KYHQHRYJ4PYFJYEG1F1IQVLQDM4G1HZ1STB2O1VUVUVQZBGS<client secret>&ll=37.33,-122.03&query=coffee&v=20120602, NSLocalizedFailureReason=A 200 response was loaded from the URL 'https://api.foursquare.com/v2/venues/search?client_id=<client id>&client_secret=<client secret>&ll=37.33,-122.03&query=coffee&v=20120602', which failed to match all (1) response descriptors:
  <RKResponseDescriptor: 0x9566a60 baseURL=https://api.Foursquare.com/v2/ pathPattern=(null) statusCodes=200-299> failed to match: response URL 'https://api.foursquare.com/v2/venues/search?client_id=<client id>&client_secret=<client secret>&ll=37.33,-122.03&query=coffee&v=20120602' is not relative to the baseURL 'https://api.Foursquare.com/v2/'., NSLocalizedDescription=No response descriptors match the response loaded., keyPath=null, NSErrorFailingURLKey=https://api.foursquare.com/v2/venues/search?client_id=<client id>&client_secret=<client secret>&ll=37.33,-122.03&query=coffee&v=20120602, NSUnderlyingError=0x758d3a0 "No mappable object representations were found at the key paths searched."}

Venue.h是：

#import <Foundation/Foundation.h>

@interface Venue : NSObject

@property (strong, nonatomic) NSString *name;

@end

Venue.m是：

#import "Venue.h"

@implementation Venue
@synthesize name;

@end

我正在使用ViewDidAppear方法中的MasterViewController.m执行所有操作，即：

- (void) viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    NSURL *baseURL = [NSURL URLWithString:@"https://api.Foursquare.com/v2"];

    AFHTTPClient * client = [AFHTTPClient clientWithBaseURL:baseURL];
    [client setDefaultHeader:@"Accept" value:RKMIMETypeJSON];

    RKObjectManager *objectManager = [[RKObjectManager alloc] initWithHTTPClient:client];

    RKObjectMapping *venueMapping = [RKObjectMapping mappingForClass:[Venue class]];
    [venueMapping addAttributeMappingsFromDictionary:@{
     @"name" : @"name"
     }];

    RKResponseDescriptor * responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:venueMapping
                                                                                        pathPattern:nil
                                                                                            keyPath:@"response.venues"
                                                                                        statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
    [objectManager addResponseDescriptor:responseDescriptor];

    NSString *latLon = @"37.33,-122.03";
    NSString *clientID = [NSString stringWithUTF8String:kCLIENTID];
    NSString *clientSecret = [NSString stringWithUTF8String:kCLIENTSECRET];

    NSDictionary *queryParams;
    queryParams = [NSDictionary dictionaryWithObjectsAndKeys:latLon, @"ll", clientID, @"client_id", clientSecret, @"client_secret", @"coffee", @"query", @"20120602", @"v", nil];
    //NSLog(@"object manager: %@ - %@", objectManager.baseURL, [[objectManager responseDescriptors] objectAtIndex:0]);

    /*
    RKRelationshipMapping* relationShipMapping = [RKRelationshipMapping relationshipMappingFromKeyPath:@"venues"
                                                                                             toKeyPath:@"venues"
                                                                                           withMapping:venueMapping];
    [venueMapping addPropertyMapping:relationShipMapping]; */
    [objectManager getObjectsAtPath:@"https://api.Foursquare.com/v2/venues/search"
                         parameters:queryParams
                         success:^(RKObjectRequestOperation * operaton, RKMappingResult *mappingResult)
                         {
                             NSLog(@"success: mappings: %@", mappingResult);
                         }
                         failure:^(RKObjectRequestOperation * operaton, NSError * error)
                         {
                             NSLog (@"failure: operation: %@ \n\nerror: %@", operaton, error);
                         }];

}

我已经在浏览器中检查了响应，并且没关系，但出于某种原因，无论我做了什么都没有消除错误。我陷入了映射的第一步，无法前进。互联网上关于这个主题的所有示例和文档都已经过时，并且没有使用RESTKit旧版本的经验，我无法解决问题。请告诉我我做错了什么。

使用xcode 4.5并为iOS6构建。

响应是（在浏览器上检查）：

{"meta":{"code":200},"response":{"venues":[{"id":"4f482132e4b0f85d07c34cb5","name":"De Anza 3 Coffee Bar","contact":{},"location":{"address":"10500 De Anza Blvd","lat":37.329438,"lng":-122.03083,"distance":96,"postalCode":"95014","city":"Cupertino","state":"CA","country":"United States","cc":"US"},"canonicalUrl":"https:\/\/foursquare.com\/v\/de-anza-3-coffee-bar\/4f482132e4b0f85d07c34cb5","categories":[{"id":"4bf58dd8d48988d1e0931735","name":"Coffee Shop","pluralName":"Coffee Shops","shortName":"Coffee Shop","icon":{"prefix":"https:\/\/foursquare.com\/img\/categories\/food\/coffeeshop_","sizes":[32,44,64,88,256],"name":".png"},"primary":true}],"verified":false,"restricted":true,"stats":{"checkinsCount":1,"usersCount":1,"tipCount":0},"likes":{"count":0,"groups":[]},"specials":{"count":0,"items":[]},"hereNow":{"count":0,"groups":[]},"referralId":"v-1357121711"},{"id":"40ccea80f964a52019011fe3","name":"Coffee Society","contact":{"phone":"4087258091","formattedPhone":"(408) 725-8091"},"location":{"address":"21265 Stevens Creek Blvd","crossStreet":"at Oaks Shopping Center","lat":37.32330342,"lng":-122.047382,"distance":1709,"postalCode":"95014","city":"Cupertino","state":"CA","country":"United States","cc":"US"},"canonicalUrl":"https:\/\/foursquare.com\/v\/coffee-society\/40ccea80f964a52019011fe3","categories":[{"id":"4bf58dd8d48988d1e0931735","name":"Coffee Shop","pluralName":"Coffee Shops","shortName":"Coffee Shop","icon":{"prefix":"https:\/\/foursquare.com\/img\/categories\/food\/coffeeshop_","sizes":[32,44,64,88,256],"name":".png"},"primary":true}],"verified":false,"restricted":true,"stats":{"checkinsCount":2536,"usersCount":869,"tipCount":24},"likes":{"count":0,"groups":[]},"specials":{"count":0,"items":[]},"hereNow":{"count":0,"groups":[]},"referralId":"v-1357121711"}, .....

4 个答案:

答案 0 :(得分：12)

我试图将完全相同的教程转换为版本0.20，最后为我修复的是将URL设置为小写（https://api.Foursquare.com/v2）。用小写的f替换那个大写的'F'，所以小写都是小写的。似乎RESTKit期望所有小写并且区分大小写，但我是iOS编程和RESTKit的新手。

另请注意：

  1. 不需要RKRelationshipMapping的东西
  2. pathPattern：nil＆amp; 的keyPath：@ “response.venues”

    3. 我相信你已经有了这些，但为了以防万一我想要冗长。

答案 1 :(得分：1)

对于来到这里并且没有CAPS问题的人（像我一样），请查看RestKit创建者的this github resolution帖子。它帮我弄明白了my path issues。

答案 2 :(得分：0)

您是否将keyPath视为“场地”而不是“response.venues”？

答案 3 :(得分：0)

由于您已将baseURL与自定义HTTP客户端一起使用，请尝试仅使用路径扩展名：

 [objectManager getObjectsAtPath:@"/venues/search"
                     parameters:queryParams
                     success:^(RKObjectRequestOperation * operaton, RKMappingResult *mappingResult)
                     {
                         NSLog(@"success: mappings: %@", mappingResult);
                     }
                     failure:^(RKObjectRequestOperation * operaton, NSError * error)
                     {
                         NSLog (@"failure: operation: %@ \n\nerror: %@", operaton, error);
                     }];

并在响应描述符中添加路径：

RKResponseDescriptor * responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:venueMapping
                                                                                    pathPattern:@"/venues/search"
                                                                                        keyPath:@"venues"
                                                                                    statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
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