Ios RestKit-从Rails应用程序获取JSON数组

我想通过我的iOS应用程序获取此JSON数据：。。。。RestKit试图从url获取这些用户，但返回0个对象，并表示“在搜索的关键路径中未找到可映射的表示形式。没有响应描述符与加载的响应匹配。”

请帮我找出我遗漏了什么或做错了什么！我已经为此奋斗了好几个星期了

我有Xcode 5.0.2，我成功地安装了带有Cocoapods的RestKit和一个如下所示的pod文件：

platform :ios, '6.0'
pod 'RestKit', '~> 0.22.0'
pod 'RestKit/Testing'
pod 'RestKit/Search'

我的AppDelegate.m文件如下（didFinishLaunchingWithOptions方法）：

在启动应用程序时首先加载的视图控制器的viewDidLoad方法中有以下代码：

- (void)viewDidLoad
{
    [super viewDidLoad];
    RKObjectManager *manager = [RKObjectManager sharedManager];
    [manager getObjectsAtPath:@"/users"
                   parameters:nil
                      success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult)
    {
        NSLog(@"Loaded databases: %@", [mappingResult array]);
    }
                      failure:^(RKObjectRequestOperation *operation, NSError *error)
    {
        NSLog(@"Error: %@", [error localizedDescription]);
    }];
 // Do any additional setup after loading the view, typically from a nib.
}

你必须：

创建一个用户类

为用户类创建映射

创建一个响应描述符 伪代码可能看起来像：

@interface User : NSObject
@property (nonatomic, copy) NSNumber *userID;
@property (nonatomic, copy) NSString *name;
...
@end

RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[User class]];
[mapping addAttributeMappingsFromDictionary:@{
                                              @"name":   @"name",
                                              @"id":     @"userID"
                                              ...
                                              }];

RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping
                                                                                        method:RKRequestMethodAny
                                                                                   pathPattern:nil
                                                                                       keyPath:nil
                                                                                   statusCodes:nil];
...
RKObjectRequestOperation *operation = [[RKObjectRequestOperation alloc] initWithRequest:request
                                                                    responseDescriptors:@[responseDescriptor]];

[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *result) {
    NSLog(@"The public timeline Tweets: %@", [result array]);
} failure:nil];

[operation start];

---

看看例子

那么“RKObjectRequestOperation*operation…”部分及其下面的部分是否仍在该用户类中？“[操作开始]”代码何时运行？

@interface User : NSObject
@property (nonatomic, copy) NSNumber *userID;
@property (nonatomic, copy) NSString *name;
...
@end

RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[User class]];
[mapping addAttributeMappingsFromDictionary:@{
                                              @"name":   @"name",
                                              @"id":     @"userID"
                                              ...
                                              }];

RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping
                                                                                        method:RKRequestMethodAny
                                                                                   pathPattern:nil
                                                                                       keyPath:nil
                                                                                   statusCodes:nil];
...
RKObjectRequestOperation *operation = [[RKObjectRequestOperation alloc] initWithRequest:request
                                                                    responseDescriptors:@[responseDescriptor]];

[operation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *result) {
    NSLog(@"The public timeline Tweets: %@", [result array]);
} failure:nil];

[operation start];