Question

我正在尝试使用RESTKit发布一些数据（一个网站的身份验证令牌，具体而言），我遇到了麻烦。每次运行该方法时，我都会得到：

'NSInvalidArgumentException', reason: '`RKRequestDescriptor` objects must be initialized 
with a mapping whose target class is `NSMutableDictionary`, got 'Login' (see 
`[RKObjectMapping requestMapping]`)'

此外，代码中还有许多“不兼容的指针类型”警告。

这是我的方法真的很丑陋和坏，我想帮助修复。按下按钮时，我在IBAction方法中执行[self postToken]。我从另一个文件获取变量userAuthToken，使用来自不使用RESTKit的POST请求的json响应来设置它。当我知道如何成功时，我最终将该POST转换为RESTKit。方法“userAuthTokenMethod”与“postToken”方法位于同一文件中，它允许我使用userAuthToken对象，该对象在AppDelegate中初始化，因此它充当全局变量。

- (void)postToken
{        
    RKObjectMapping *mapping = [RKObjectMapping mappingForClass:[Login class]];
    [mapping addAttributeMappingsFromDictionary:@{@"token": @"token"}];
    NSIndexSet *statusCodeSet = RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful);
    RKResponseDescriptor *tokenResponseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:mapping method:nil pathPattern:nil keyPath:nil statusCodes:statusCodeSet];
    RKRequestDescriptor *tokenRequestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:mapping objectClass:self rootKeyPath:nil method:nil];
    [[RKObjectManager sharedManager] addRequestDescriptor:tokenRequestDescriptor];
    RKObjectManager *tokenManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:@"https://websitetest.com/doctors/find"]];
    [tokenManager addResponseDescriptor:tokenResponseDescriptor];
    [tokenManager addRequestDescriptor:tokenRequestDescriptor];
    [tokenManager postObject:[[self userAuthTokenMethod] userAuthToken] path:nil parameters:nil success:nil failure:nil];


    NSURL *tokenURL = [NSString stringWithFormat:@"https://websitetest.com/doctors/find?name=%@&location=%@",nameIDTextField.text, locationTextField.text];
    NSMutableURLRequest *tokenRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:tokenURL]];
    RKObjectManager *tokenObjectManager = [RKObjectManager managerWithBaseURL:[NSURL URLWithString:tokenURL]];
    [tokenObjectManager.HTTPClient setDefaultHeader:@"Auth-Token" value:[[self network360Edge] userAuthToken]];
    RKObjectRequestOperation *tokenOperation = [[RKObjectRequestOperation alloc] initWithRequest:tokenRequest responseDescriptors:@[tokenResponseDescriptor]];
    NSLog(@"Token being POSTed ==> %@", [[self userAuthTokenMethod] userAuthToken]);
    [tokenOperation setCompletionBlockWithSuccess:^(RKObjectRequestOperation *operation, RKMappingResult *result){
        NSLog(@"Response for POST request with token ==> %@", [result array]);
    }failure:nil];
    [tokenOperation start];
}

以下是名为MappingProvider的映射提供程序文件的代码：

//MappingProvider.h
#import <Foundation/Foundation.h>
#import <RestKit/RestKit.h>

@interface MappingProvider : NSObject

+(RKMapping *)tokenMapping;

@end

//MappingProvider.m
#import "MappingProvider.h"
#import <RestKit/RestKit.h>
#import "Login.h"

@implementation MappingProvider

+(RKMapping *)tokenMapping
{
    RKObjectMapping *tokenMapping = [RKObjectMapping mappingForClass:[Login class]];
    [tokenMapping addAttributeMappingsFromArray:@[@"token"]];
    return tokenMapping;
}

@end

以下是登录文件的代码，其中'token'已初始化：

//Login.h
#import <Foundation/Foundation.h>

@interface Login : NSObject

@property (nonatomic, copy)NSString *token;

@end

我是RESTKit的新手，而且是Objective-C的新手（我已经在其中编写了大约一个月）。我很感激修复代码的所有帮助。

Answer 1

这个问题很老，但问题是请求应该使用没有类规范的映射，因为请求使用指定类的描述符（参见下面的2行），如下所示：

RKObjectMapping *requestMapping = [RKObjectMapping requestMapping];

可能你也有问题：

RKRequestDescriptor *tokenRequestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:mapping objectClass:self rootKeyPath:nil method:nil];

更具体地说，在 objectClass：self 中，它应该是 objectClass：[self class] 或包含 token 属性的所需类，例如这样：

RKRequestDescriptor *tokenRequestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:requestMapping objectClass:[self class] rootKeyPath:nil method:nil];

希望这有帮助

使用RESTKit执行POST请求时遇到问题

1 个答案: