iOS - ARC和解析中单个API的不同响应答案

【问题标题】：iOS - different response from single API in ARC and parsingiOS - ARC和解析中单个API的不同响应
【发布时间】：2016-06-23 09:25:17
【问题描述】：

在我的项目中，我通过这个 API：http://dev-demo.info.bh-in-15.webhostbox.net/dv/nationalblack/api/businessbysubcat 和参数：prod_id=25,var_id=140。问题是当我在 Rest Client 中传递这个 api 时，它会显示正确的响应，但是当我尝试将它放入我的代码中时，它会显示不同的响应。

我正在使用以下代码：

-(void)listofNotice
{
    NSString *post = [NSString stringWithFormat:@"prod_id=25,var_id=140"];
    NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
    NSString *postLength = [NSString stringWithFormat:@"%lu", (unsigned long)[postData length]];

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

    [request setURL:[NSURL URLWithString:@"http://dev-demo.info.bh-in-15.webhostbox.net/dv/nationalblack/api/businessbysubcat"]];
    [request setHTTPMethod:@"POST"];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
    [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
    [request setHTTPBody:postData];

    NSURLResponse *response;
    NSError *err;
    NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];

    //NSString *str=[[NSString alloc]initWithData:responseData encoding:NSUTF8StringEncoding];
    //NSLog(@"str : %@",str);

    NSDictionary *dict6 = [self cleanJsonToObject:responseData];
    NSLog(@"str : %@",dict6);

}


- (id)cleanJsonToObject:(id)data
{
    NSError* error;
    if (data == (id)[NSNull null])
    {
        return [[NSObject alloc] init];
    }
    id jsonObject;
    if ([data isKindOfClass:[NSData class]])
    {
        jsonObject = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
    }
    else
    {
        jsonObject = data;
    }
    if ([jsonObject isKindOfClass:[NSArray class]])
    {
        NSMutableArray *array = [jsonObject mutableCopy];
        for (int i = (int)array.count-1; i >= 0; i--)
        {
            id a = array[i];
            if (a == (id)[NSNull null])
            {
                [array removeObjectAtIndex:i];
            } else
            {
                array[i] = [self cleanJsonToObject:a];
            }
        }
        return array;
    }
    else if ([jsonObject isKindOfClass:[NSDictionary class]])
    {
        NSMutableDictionary *dictionary = [jsonObject mutableCopy];
        for(NSString *key in [dictionary allKeys])
        {
            id d = dictionary[key];
            if (d == (id)[NSNull null])
            {
                dictionary[key] = @"";
            } else
            {
                dictionary[key] = [self cleanJsonToObject:d];
            }
        }
        return dictionary;
    }
    else
    {
        return jsonObject;
    }
}

它显示以下响应：

str : {
    business = 0;
    "business-list" = "Business list empty.";
    response = 401;
}

但实际的反应是这样的

请帮帮我..提前谢谢

【问题讨论】：

您是否在调用 API 之前进行了一些身份验证，因为它会给出 401 作为响应。虽然这不是正确的方法
@abhi : 应该是后端反序列化的问题。使用 AFNetwokring 并在其中使用 AFJSONRequestSerializer 将数据作为参数传递。当您在后端以正常方式发送时，它们可能会得到空值。 AFJSONRequestSerializer 帮助您以正确的 json 格式发送参数。
它现在可以工作了我在代码中犯的唯一错误是我使用的是，而不是 &

标签： ios objective-c json parsing

【解决方案1】：

请改一下

NSString *post = [NSString stringWithFormat:@"prod_id=25,var_id=140"];

收件人：

NSString * post =[NSString stringWithFormat:@"prod_id=25&var_id=140"];

如果可能的话，使用这个：

    NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
        configuration.HTTPAdditionalHeaders = @{@"application/x-www-form-urlencoded" :  @"Content-Type"};
        NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration delegate:self delegateQueue:nil];
        NSURL *url = [NSURL URLWithString:@"http://dev-demo.info.bh-in-15.webhostbox.net/dv/nationalblack/api/businessbysubcat"];
        NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];

      NSData *requestData = [post dataUsingEncoding:NSUTF8StringEncoding];
      [request setHTTPMethod:@"POST"];
      [request setHTTPBody:requestData];

      NSURLSessionDataTask *postDataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)                                                                              {   
  if (data != nil){
    NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
    NSInteger code = [httpResponse statusCode];
    NSLog(@"Status Code: %ld", (long)code);

  if (code == 200) {
    NSError *error;
    id responseObject =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
   }
  }                                                                              
}];

[postDataTask resume];

或

    NSString *postString = [NSString stringWithFormat:@"prod_id=%@&var_id=%@",@"25",@"140"];
    NSURL *urlPath = [NSURL URLWithString:@"http://dev-demo.info.bh-in-15.webhostbox.net/dv/nationalblack/api/businessbysubcat"];
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:urlPath
                                                           cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];

    NSData *requestData = [postString dataUsingEncoding:NSUTF8StringEncoding];
    [request setHTTPMethod:@"POST"];
    [request setHTTPBody:requestData];
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
        [APP_DELEGATE removeLoader];

        if(data != nil) {
            NSDictionary *responseObject =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
            NSLog(@" %@", responseObject);
        }
        else {
        }
    }];

希望这会有所帮助。

【讨论】：

【解决方案2】：

我认为您需要更改以下代码

NSString *post = [NSString stringWithFormat:@"prod_id=25,var_id=140"];

到

NSDictionary *prodDict=@{@"prod_id":@"25",
                         @"var_id":@"140"};

【讨论】：