如何迭代并获取NSDictionary中的所有值

Question

我有个问题。

我正在使用XMLReader类来获得NSDictionary，一切都很好。但我无法获得productData元素的矩阵值。

具体来说，我有以下NSDictionary:

{
response = {
  products = {
   productsData = (
    {
    alias = "Product 1";
    id = 01;
    price = "10";
    },
    {
    alias = "Product 2";
    id = 02;
    price = "20";
    },
    {
    alias = "Product 3";
    id = 03;
    price = "30";
  });
 };
};
}

我用这个代码创建了deNSDictionary:

NSDictionary *dictionary = [XMLReader dictionaryForXMLData:responseData error:&parseError];

和responseData包含：

<application>
  <products>
    <productData>
      <id>01</id>
      <price>10</price>
      <alias>Product 1</alias>
    </productData>
    <productData>
      <id>02</id>
      <price>20</price>
      <alias>Product 2</alias>
    </productData>
    <productData>
      <id>02</id>
      <price>20</price>
      <alias>Product 3</alias>
    </productData>
  </products>
</application>

然后，我不知道如何获取每个productData的值，比如id、price和alias。。。

有人知道怎么做吗？？

谢谢，请原谅我英语不好！

Answer 1

NSArray* keys = [theDict allKeys];
for(NSString* key in keys) {
    id obj = [theDict objectForKey:key];
    // do what needed with obj
}

你可以试试这样的东西：

NSArray* keys = [theDict allKeys];
for(NSString* key in keys) {
    if ([key isEqualToString:@"product"]) {
    NSArray* arr = [theDict objectForKey:key];
    // do what needed with arr 
}
    }

Answer 2

NSDictionary--allValues上有一个方法，它返回一个包含字典值的新数组。也许这会有所帮助。

Answer 3

从开始

NSDictionary *dictionary = [XMLReader dictionaryForXMLData:responseData error:&parseError];

你可以这样做：

NSDictionary *application = [dictionary objectForKey:@"application"];
if ([[application objectForKey:@"products"] isKindOfClass [NSArray class]]) {
    NSArray *products = [application objectForKey:@"products"];
    for (NSDictionary *aProduct in products) {
       // do something with the contents of the aProduct dictionary
    }
else if {[[application objectForKey:@"products"] isKindOfClass [NSDictionary class]]) {
    // you will have to see what the returned results look like if there is only one product 
    // that is not in an array, but something along these lines may be necessary
    // to get to a single product dictionary that is returned
}

我遇到过类似的情况(解析JSON(，其中没有为signle值返回数组，因此必须检查结果是否为数组(在您的情况下为产品字典(或单个NSDictionary(在您情况下为商品字典(。