How to get values from this JSON String in Objective C, iPhone - iphone

Question

I wanted to parse a JSON String which looks like this.
There are more code in the Json String, i am pasting a sample here.
[
{ "Mainhd":"Select The Correct Adjective From The Given Options.",
"Sub":
[
{
"quetn":"Bill is two years ___ than Wanda.",
"Answr":"1",
"optns":"1,2",
"1":"younger",
"2":"smaller"
},
{
"quetn":"France is ___ European country.",
"Answr":"2",
"optns":"1,2",
"1":"an",
"2":"a"
}]
}
]
For parsing the above JSON, I am doing like this in Objective C code.
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError* error;
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData: jsonData //1
options:kNilOptions
error:&error];
//NSLog(#"JSON : %#",json);
if(error){
NSLog(#"Error %#", [error localizedDescription]);
}
NSString *latestLoans = [json valueForKey:#"Mainhd"];
NSLog(#"Mainhd: %#", latestLoans); //3
NSString *sub = [json valueForKey:#"Sub"];
NSLog(#"SUB: %#", sub); //3
While executing this code, I am getting this output.
SUB: (
(
{
1 = younger;
2 = smaller;
Answr = 1;
optns = "1,2";
quetn = "Bill is two years ___ than Wanda.";
},
{
1 = an;
2 = a;
Answr = 2;
optns = "1,2";
quetn = "France is ___ European country.";
},
{
1 = gorgeous;
2 = gorgeousest;
3 = gorgeouser;
Answr = 1;
optns = "1,2,3";
quetn = "Arya is looking _______ in this dress.";
}
)
)
After that i want to get values from "SUB".
I am trying like this, but not working
NSData *myData = [NSKeyedArchiver archivedDataWithRootObject:sub];
//NSData *jsonData2 = [sub dataUsingEncoding:NSUTF8StringEncoding];
NSArray *arr = [NSJSONSerialization JSONObjectWithData:myData
options:0 error:&error];
NSLog(#"ARR: %#", arr); //3
I am getting NULL.

Answer 1

it's worth noting in the JSON you posted, that the value for sub is an array, so you would need to treat this as such and loop through it to get your values
[
{ "Mainhd":"Select The Correct Adjective From The Given Options.",
"Sub":
[
{
"quetn":"Bill is two years ___ than Wanda.",
"Answr":"1",
"optns":"1,2",
"1":"younger",
"2":"smaller"
},
{
"quetn":"France is ___ European country.",
"Answr":"2",
"optns":"1,2",
"1":"an",
"2":"a"
}]
}
]
So the following should point you in the right direction
NSArray *subArray = [json valueForKey:#"Sub"];
//loop array using each response as a dictionary
for (NSDictionary *key in subArray){
//log the value to console
NSLog (#"Value is %#", [key objectForKey:#"quetn");
}
Hope that helps