How I can iterate and get all values in a NSDictionary? - iphone

Question

I have a problem.
I am using the XMLReader class to get a NSDictionary and everything works fine. But i can't to get the values of the atributes of my productData element.
Specifically, I have the following 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";
});
};
};
}
I used this code to create de NSDictionary:
NSDictionary *dictionary = [XMLReader dictionaryForXMLData:responseData error:&parseError];
and responseData contains:
<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>
Then, i don't know how get the values of each productData like id, price and alias...
Anybody know how to do it??
Thanks and please forgive my bad english !

Answer 1

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

There is a method on NSDictionary - -allValueswhich returns a new array containing the dictionary’s values. Maybe that will help.

Answer 3

Starting with
NSDictionary *dictionary = [XMLReader dictionaryForXMLData:responseData error:&parseError];
you can do something like this:
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
}
I have had a case similar to this (parsing JSON) where an array was not returned for a signle value, so the result had to be checked for both an array (of product dictionaries in your case) or a single NSDictionary (the product dictionary in your case).