SBJsonWriter嵌套NSDictionary [英] SBJsonWriter Nested NSDictionary

问题描述

我正在尝试使用Json序列化objc对象，以将其发送到服务器.

I'm trying to serialize an objc object with Json to send it to a server.

同一服务器为此对象类型在GET上发送以下内容:

That same server sends the following on GET for this object type:

 {
   "TypeProperties":[
      {"Key":"prop 0","Value":"blah 0"},
      {"Key":"prop 1","Value":"blah 1"},
      {"Key":"prop 2","Value":"blah 2"},
      {"Key":"prop 3","Value":"blah 3"}
     ],
   "ImageURls":[
      {"Key":"url 0","Value":"blah 0"},
      {"Key":"url 1","Value":"blah 1"},
      {"Key":"url 2","Value":"blah 2"},
      {"Key":"url 3","Value":"blah 3"}
     ]
}

SBJsonWriter为我在objc中创建的匹配对象/类型生成以下内容:

SBJsonWriter produces the following for the matching object/type that I've created in objc:

{
  "TypeProperties": {
    "key 2": "object 2",
    "key 1": "object 1",
    "key 4": "object 4",
    "key 0": "object 0",
    "key 3": "object 3"
  },
  "ImageUrls": {
    "key 0": "url 0",
    "key 1": "url 1",
    "key 2": "url 2"
  }
}

这就是我使用SBJsonWriter的方式:

This is how I'm using SBJsonWriter:

SBJsonWriter *writer = [[SBJsonWriter alloc] init];
writer.humanReadable = YES;
NSString* json = [writer stringWithObject:itemToAdd];

这是我正在序列化的类中的proxyForJson的实现(SBJsonWriter要求):

Here's my implementation of proxyForJson in the class being serialized (required by SBJsonWriter):

- (NSDictionary*) proxyForJson
{
      return [NSMutableDictionary dictionaryWithObjectsAndKeys:
                self.typeProperties, @"TypeProperties",
                self.imageUrls, @"ImageUrls",
                nil];
}

要序列化的类仅包含两个属性:typeProperties和imageUrls(均为NSMutableDictionary).

The class being serialized contains only the two properties: typeProperties and imageUrls (both are NSMutableDictionary).

现在，问题是:执行POST时，服务器(不奇怪)不会解析SBJsonWriter产生的Json.问题是:如何生成与服务器提供的Json相匹配的Json(假设匹配的Json在上载时会被正确解析).

Now, the problem: the server (not surprisingly) does not parse the Json produced by SBJsonWriter when I perform a POST. And the question: how do I produce Json that matches that which is provided by the server (assuming that matching Json would be parsed correctly on upload).

在此先感谢您的帮助.

推荐答案

在JSON中，{ }表示一个对象(键/值对)，而[ ]表示一个数组.从您提供的示例来看，这是服务器的期望值:

In JSON, { } represents an object (key/value pairs) and [ ] represents an array. Judging by the sample you provided, here's what your server expects:

主要对象:带有两个键的字典:TypeProperties和ImageUrls.

Top Object: dictionary with two keys: TypeProperties and ImageUrls.

TypeProperties 和 ImageUrls :每个数组都是一个包含一个或多个对象的数组，这些对象带有两个键:Key和Value.每个键应具有各自的值.

TypeProperties and ImageUrls: each is an array containing one or more objects with two keys: Key and Value. Each key should have its respective value.

要符合服务器的期望，您需要一个与此类似的结构(请注意，这只是一个简单的示例，直接在此处编写，但应指出正确的方向):

To comply with what your server expects, you need a structure similar to this (note this is just a bare example, written directly here, but should point you in the right direction):

NSDictionary *object = [NSDictionary dictionaryWithObjectsAndKeys:
                        @"prop 0", @"Key",
                        @"blah 0", @"Value",
                        nil];

NSArray *typeProperties = [NSArray arrayWithObjects:
                           object, // Add as many similar objects as you want
                           nil];

NSArray *imageUrls = [NSArray arrayWithObjects:
                      object, // Add as many similar objects as you want
                      nil];

然后，在您的proxyForJson方法中，您可以使用:

Then, in your proxyForJson method, you can use:

- (NSDictionary*) proxyForJson
{
      return [NSDictionary dictionaryWithObjectsAndKeys:
              typeProperties, @"TypeProperties",
              imageUrls, @"ImageUrls",
              nil];
}

这篇关于SBJsonWriter嵌套NSDictionary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！