无法使用 AFNetworking 3 为 JSON 和 XML 响应创建单例

Cannot make singleton for JSON and XML response using AFNetworking 3

您好,我正在为 JSON 和 XML 响应制作一个网络单例

我的ApiClient.h

+ (ApiClient *)sharedInstance;

-(instancetype)initWithBaseURL:(NSURL *)url sessionConfiguration:(NSURLSessionConfiguration *)configuration;

我的ApiClient.m

+ (ApiClient *)sharedInstance {
    static ApiClient *sharedInstance = nil;

    static dispatch_once_t oncePredicate;
    dispatch_once(&oncePredicate, ^{
        NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];
        sharedInstance = [[self alloc] initWithBaseURL:[NSURL URLWithString:SINGPOST_BASE_URL] sessionConfiguration:sessionConfiguration];

        [sharedInstance setDataTaskWillCacheResponseBlock:^NSCachedURLResponse *(NSURLSession *session, NSURLSessionDataTask *dataTask, NSCachedURLResponse *proposedResponse)
         {
             NSHTTPURLResponse *resp = (NSHTTPURLResponse*)proposedResponse.response;
             NSMutableDictionary *newHeaders = [[resp allHeaderFields] mutableCopy];
             if (newHeaders[@"Cache-Control"] == nil) {
                 newHeaders[@"Cache-Control"] = @"max-age=120, public";
             }
             NSURLResponse *response2 = [[NSHTTPURLResponse alloc] initWithURL:resp.URL statusCode:resp.statusCode HTTPVersion:nil headerFields:newHeaders];
             NSCachedURLResponse *cachedResponse2 = [[NSCachedURLResponse alloc] initWithResponse:response2
                                                                                             data:[proposedResponse data]
                                                                                         userInfo:[proposedResponse userInfo]
                                                                                    storagePolicy:NSURLCacheStorageAllowed];
             return cachedResponse2;
         }]; 
    });
    return sharedInstance;
}
-(instancetype)initWithBaseURL:(NSURL *)url sessionConfiguration:(NSURLSessionConfiguration *)configuration {
    self = [super initWithBaseURL:url sessionConfiguration:configuration];
        if (self) {
        }
    return self;
}

问题是单例无法同时处理 XML 和 JSON 响应。它可以成功解析 JSON 和 XML 1 次。但是当再次调用再次解析时)(成功解析后XML)结果将无法正确解析(给出十六进制字符串响应)

我的JSON 阻止请求

- (void)sendJSONRequest:(NSMutableURLRequest *)request
                success:(void (^)(NSURLResponse *response, id responseObject))success
                failure:(void (^)(NSError *error))failure {

    self.responseSerializer.acceptableContentTypes = [AFHTTPResponseSerializer serializer].acceptableContentTypes;

    NSURLSessionDataTask *dataTask = [self dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
        if (error) {
            NSLog(@"Error URL: %@",request.URL.absoluteString);
            NSLog(@"Error: %@", error);
            failure(error);
        } else {
            NSDictionary *jsonDict  = (NSDictionary *) responseObject;
            success(response,jsonDict);
            NSLog(@"Success URL: %@",request.URL.absoluteString);
            NSLog(@"Success %@",jsonDict);
        }
    }];
    [dataTask resume];

}

我的XML 区块请求

- (void)sendXMLRequest:(NSMutableURLRequest *)request
               success:(void (^)(NSURLResponse *response, RXMLElement *responseObject))success
               failure:(void (^)(NSError *error))failure {

    self.requestSerializer = [AFHTTPRequestSerializer serializer];
    self.responseSerializer = [AFHTTPResponseSerializer serializer];
    [self.responseSerializer.acceptableContentTypes setByAddingObject:@"application/xml"];
    NSURLSessionDataTask *dataTask = [self dataTaskWithRequest:request completionHandler:^(NSURLResponse *response, id responseObject, NSError *error) {
        if (error) {
            NSLog(@"Error URL: %@",request.URL.absoluteString);
            NSLog(@"Error: %@", error);
            failure(error);
        } else {
            RXMLElement *rootXml = [RXMLElement elementFromXMLData:responseObject];
            success(response, rootXml);
            NSLog(@"Success URL: %@",request.URL.absoluteString);
            NSLog(@"Success %@",rootXml);

        }
    }];
    [dataTask resume];
}

我的十六进制字符串无法响应:

无论如何要使单例正常工作,或者我需要为 JSON 和 XML 响应制作 2 个单例?非常感谢任何帮助。谢谢!

您的错误很可能告诉您它期望 Content-Typeapplication/xml,而您可能有一个 application/json。很难说,因为您没有分享完整的错误,但很可能是这样。

有两种合乎逻辑的方法。或者:

  1. 让单个 AFHTTPSessionManager 同时接受 XML 和 JSON。因此,使用 AFHTTPResponseSerializerresponseSerializerapplication/xmlapplication/jsonacceptableContentTypes (或任何特定的 Content-Type 你的两个网络服务 return),然后当您收到 NSData 响应对象时,根据需要解析 XML 或 JSON。

  2. 有单独的 AFHTTPSessionManager 个对象,一个用于 XML(具有 AFXMLResponseSerializerresponseSerializer)和一个用于 JSON(具有responseSerializerAFJSONResponseSerializer)。注意,如果你这样做,你根本不需要调整acceptableContentTypes