Question

我正在学习Rest-kit。我正在尝试解析此网址https://api.coursera.org/api/catalog.v1/courses?fields=language,shortDescription

我创建了一个Courses课程。

@interface Courses : NSObject

@property (nonatomic, strong) NSString *name;

@end

并在viewcontroller中我写了下面的代码

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self configureRestKit];
    [self loadCourses];
}

- (void)configureRestKit
{

    //  https://api.coursera.org/api/catalog.v1/courses?fields=language,shortDescription

    // initialize AFNetworking HTTPClient
    NSURL *baseURL = [NSURL URLWithString:@"https://api.coursera.org"];
    AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:baseURL];

    // initialize RestKit
    RKObjectManager *objectManager = [[RKObjectManager alloc] initWithHTTPClient:client];

    // setup object mappings
    RKObjectMapping *courseMapping = [RKObjectMapping mappingForClass:[Courses class]];
    [courseMapping addAttributeMappingsFromDictionary:@{
                                                       @"name":@"name"
                                                       }];
    // register mappings with the provider using a response descriptor
    RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:courseMapping method:RKRequestMethodGET pathPattern:@"/api/catalog.v1/courses?fields=language,shortDescription" keyPath:@"elements" statusCodes:[NSIndexSet indexSetWithIndex:200]];
    [objectManager addResponseDescriptor:responseDescriptor];
}

- (void)loadCourses
{
    [[RKObjectManager sharedManager] getObjectsAtPath:@"/api/catalog.v1/courses?fields=language,shortDescription" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
        NSLog(@"%@", mappingResult.array);

    } failure:^(RKObjectRequestOperation *operation, NSError *error) {
        NSLog(@"What do you mean by 'there is no Courses?': %@", error);
    }];
}

错误：_Error Domain = org.restkit.RestKit.ErrorDomain Code = 1001＆＃34;没有响应描述符与加载的响应匹配。＆＃34; 我没有成功阻止回应。请指正。提前致谢

Answer 1

不要将查询参数添加到响应描述符的路径模式中，并将它们设置为请求中的参数：

pathPattern:@"/api/catalog.v1/courses"

一般来说，我也会说/api/catalog.v1/应该是基本网址的一部分，所以你会有：

NSURL *baseURL = [NSURL URLWithString:@"https://api.coursera.org/api/catalog.v1/"];
...
... pathPattern:@"courses" ...
...
... getObjectsAtPath:@"courses" parameters:@{ @"fields" : @"language,shortDescription" } ...

Restkit基本网址响应

1 个答案: