AFNetworking在POST请求的JSON参数发送阵列 [英] AFNetworking send array in JSON parameters of post request

问题描述

我想通过POST将参数发送到我的服务器，它通常工作，但我无法弄清楚如何发送包含数组作为参数之一JSON。以下是我已经试过：

I'm trying to send parameters to my server via POST, and it works generally, but I can't figure out how to send JSON that contains an array as one of the parameters. Here's what I've tried:

AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:myURL]];
NSMutableArray *objectsInCart = [NSMutableArray arrayWithCapacity:[_cart count]];
for(NSDictionary *dict in _cart)
{
    NSObject *object = [dict objectForKey:@"object"];
    NSDictionary *objectDict = @{@"product_id": [NSString stringWithFormat:@"%d",[object productID]],
                                 @"quantity": [NSString stringWithFormat:@"%d", [[dict objectForKey:@"count"] intValue]],
                                 @"store_id": [NSString stringWithFormat:@"%d", [Store getStoreID]],
                                 @"price": [NSString stringWithFormat:@"%.2f", [object price]]};
    [objectsInCart addObject:objectDict];
}
NSError *error = nil;
NSString *cartJSON = [[NSString alloc] initWithData:[NSJSONSerialization dataWithJSONObject:objectsInCart
                                                                                    options:NSJSONWritingPrettyPrinted
                                                                                      error:&error]
                                           encoding:NSUTF8StringEncoding];

if(error)
{
    NSLog(@"Error serializing cart to JSON: %@", [error description]);
    return;
}

NSDictionary *parameters = @{@"status": @"SUBMITTED",
                             @"orders": cartJSON};

NSMutableURLRequest *orderRequest = [httpClient requestWithMethod:@"POST"
                                                             path:@"/app/carts"
                                                       parameters:parameters];

AFJSONRequestOperation *JSONOperation = [[AFJSONRequestOperation alloc] initWithRequest:orderRequest];

不过，我发送此JSON时，得到一个错误。任何建议都多少AP preciated！

However, I get an error when sending this JSON. Any suggestions are much appreciated!

推荐答案

我没有看到你指定要张贴JSON，所以我打赌你发送表单URL参数编码，它是这样此，根据本AFHTTPClient文件：

I don't see where you're specifying you want to post JSON, so I'm betting you're sending Form URL Parameter Encoding, which goes like this, according to the AFHTTPClient documentation:

如果一个查询字符串对有一个的NSArray 为它的价值，阵列中的每个成员将被重新$ P格式psented $ 场[] =值1＆放大器;场[] =值2 。否则，对将被格式化为字段=价值。重新串键和值的presentations使用 -description 法得出。构建查询串不包含？字符用来分隔查询组成部分。

If a query string pair has a an NSArray for its value, each member of the array will be represented in the format field[]=value1&field[]=value2. Otherwise, the pair will be formatted as "field=value". String representations of both keys and values are derived using the -description method. The constructed query string does not include the ? character used to delimit the query component.

如果您的服务器确实期待您张贴JSON，在第二行添加此告诉AFNetworking是：

If your server is indeed expecting you to post JSON, add this on the second line to tell AFNetworking that:

// AFNetworking 1.0
// httpClient is a subclass of AFHTTPClient
httpClient.parameterEncoding = AFJSONParameterEncoding;

// AFNetworking 2.0
// httpClient is a subclass of AFHTTPRequestOperationManager or AFHTTPSessionManager
httpClient.requestSerializer = AFJSONRequestSerializer;

您会然后删除您的来电 NSJSONSerialization ，只是把 objectsInCart 到参数字典。

You would then remove your call to NSJSONSerialization and just put objectsInCart into the parameters dictionary.

一个侧面说明：这是正常的子类 AFHTT prequestOperationManager 或 AFHTTPSessionManager （AFNetworking 2.0）或 AFHTTPClient （AFNetworking 1.0），并把这种类型的配置，在你的 initWithBaseURL：方法。 （你可能不想旋转了一个新的客户端为每一个请求。）

A side note: it's normal to subclass AFHTTPRequestOperationManager or AFHTTPSessionManager (AFNetworking 2.0) or AFHTTPClient (AFNetworking 1.0) and put this type of configuration in your initWithBaseURL: method. (You probably don't want to spin up a new client for every request.)

这篇关于AFNetworking在POST请求的JSON参数发送阵列的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！