Iterate through nested JSON arrays iPhone

Question

I have a json feed like this:

 {
result = {
  cars =  {
        brand = {
             fields = {
       name = {
        id = 1234;
                        value = "Opel Astra";
           };
     description = {
        id = 4432;
        value = "Some description"; 
    };
           };
      fields = {
       name = {
        id = 1453;
                        value = "Opel Omega";
           };
     description = {
        id = 4430;
        value = "Some description"; 
    };
    ...
           };
     };
   };

When I parse this, I get all objects in an array and not as a seperate string which is what I want.

I've done like this:

NSArray *result = [[res objectForKey:@"result"]valueForKeyPath:@"cars.brand.fields.name.value"];
NSLog(@"%@" , [result objectAtIndex:0]):

The output is:

(
    "Opel Astra",
    "Opel Omega",
    ....
),

How can I achieve getting one string at a time, instead of an array containing a lot of string?

Thanks!

score 1 · Answer 1 · answered Jan 05 '12 at 09:31

1

Try SBJSON to parse the JSON in objective-C.

You can get the SBJSON from here

answered Jan 05 '12 at 09:31

nithinbhaktha

723
5
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score 0 · Answer 2 · edited May 23 '17 at 11:48

0

Use NSJSONSerialization to retrieve the JSON data into a foundation object.

See also this post.

edited May 23 '17 at 11:48

Community

1
1

answered Jan 05 '12 at 09:07

petert

6,672
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Can't use NSJSONSerialization because that's only available on iOS 5.0 and later. – Magnus Jan 05 '12 at 09:19

score 0 · Answer 3 · answered Jan 05 '12 at 09:37

0

You are also able to Handle the JSON String as id-Value. Then you call [jsonString objectForKey:@"result"].

And try this Function, it works perfectly for me ;)

- (id) objectInObject:(NSObject *) rootObject forPath:(NSString *) aKeyPath {

NSArray *keys = [aKeyPath componentsSeparatedByString:@"."];
NSObject *anObject = rootObject;


for (NSString *aKey in keys) {
    int arrayIndex = 0;
    bool isArray = NO;

    // check array
    if ([[aKey substringToIndex:2] isEqualToString:@"i:"]) {
        isArray = YES;
        NSArray *values = [aKey componentsSeparatedByString:@":" ];
        arrayIndex = [[values objectAtIndex:1] intValue];
    }

    if (isArray) {
        anObject = [(NSArray *) anObject objectAtIndex:arrayIndex];
    } else {
        anObject = [(NSDictionary *) anObject objectForKey:aKey];
    }
}
return anObject;

}

answered Jan 05 '12 at 09:37

Dennis Stritzke

5,198
1
19
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Should I just pass an array or a dictionary, for rootObject? – Magnus Jan 05 '12 at 09:42
I tried this method. I passed an NSArray. Still get the same output – Magnus Jan 05 '12 at 09:49
What is the "i:" ? Where do you get that from? – Magnus Jan 05 '12 at 09:51
as Root Object you should pass an id JsonObject. The i: test allows you to set the keyPath "somekey.somearray.i:2", wich will get you the third (because of 0 indexed) Array. – Dennis Stritzke Jan 05 '12 at 09:59

score 0 · Answer 4 · answered Jan 05 '12 at 19:46

0

Use SBJson as your JSON lib. Then just use this line of code (response is a string) and you will get expected output you want.

    NSMutableDictionary *responseJSON = [response JSONValue];

answered Jan 05 '12 at 19:46

AAV

3,785
8
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Iterate through nested JSON arrays iPhone

4 Answers4