NSJSONSerialization only getting root key - objective-c

Question

I'm having an issue parsing JSON from a PHP server using NSJSONSerialization. JSLint says my JSON is valid but appears to only be able to get one-two levels in.
This is essentially my JSON structure:
{
"products":
[{
"product-name":
{
"product-sets":
[{
"set-3":
{
"test1":"test2",
"test3":"test4"
},
"set-4":
{
"test5":"test6",
"test7":"test8"
}
}]
},
"product-name-2":
{
"product-sets":
[{
}]
}
}]
}
and here is my code to parse it:
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];
if (json) {
NSArray *products = [json objectForKey:#"products"]; // works
for (NSDictionary *pItem in products) { // works
NSLog(#"Product: %#", pItem); // works, prints the entire structure under "product-name"
NSArray *productSets = [pItem objectForKey:#"product-sets"]; // gets nil
for (NSDictionary *psItem in productSets) {
// never happens
}
}
}
I've been spinning my wheels on this for several hours, but I'm not finding anything similar anywhere I search. Are there any limitations that I'm unaware of, or am I just not seeing something obvious?

Answer 1

you missed one nested object
NSArray *productSets = [[pItem objectForKey:#"product-name"] objectForKey:#"product-sets"];
I tested it with this CLI program
#import <Foundation/Foundation.h>
int main(int argc, const char * argv[])
{
#autoreleasepool {
NSString *jsonString = #"{\"products\":[{\"product-name\": {\"product-sets\": {\"set-3\":{\"test1\":\"test2\", \"test3\":\"test4\"}, \"set-4\":{\"test5\":\"test6\", \"test7\":\"test8\"} }}}, {\"product-name-2\": \"2\"}]}";
// insert code here...
NSLog(#"%#", jsonString);
NSError *error;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:[jsonString dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:&error];
if (json) {
NSArray *products = [json objectForKey:#"products"]; // works
for (NSDictionary *pItem in products) { // works
NSLog(#"Product: %#", pItem); // works, prints the entire structure under "product-name"
NSArray *productSets = [[pItem objectForKey:#"product-name"] objectForKey:#"product-sets"]; // gets nil
for (NSDictionary *psItem in productSets) {
NSLog(#"%#", psItem);
}
}
}
}
return 0;
}
Note, that some things in your json are quite strange:
for each flattened object the keys should be the same. keys, that include a number o an object do not make much sense. If you need to keep track of single objects, include an id key with a proper value.