How do I parse this nested JSON output in Objective C?

Question

I'm trying to parse a nested JSON output like this in Objective C:

{
-Status: {
code: 200
request: "geocode"
name: "1.304044,103.833867"
}
-Placemark: [
-{
-Point: {
-coordinates: [
103.834
1.30396
0
]
}
-AddressDetails: {
-Country: {
CountryName: "Singapore"
-Thoroughfare: {
ThoroughfareName: "Bus stop at Lucky Plaza (09048)"
}
CountryNameCode: "SG"
}
Accuracy: 9
}
id: "p1"
address: "Bus stop at Lucky Plaza (09048)"
}
-{
-Point: {
-coordinates: [
103.834
1.30444
0
]
}
-AddressDetails: {
-Country: {
CountryName: "Singapore"
AddressLine: "Lucky Plaza"
-Thoroughfare: {
-PostalCode: {
PostalCodeNumber: "238863"
}
ThoroughfareName: "304 Orchard Road"
}
CountryNameCode: "SG"
}
Accuracy: 9
}
id: "p2"
address: "Lucky Plaza, 304 Orchard Road, Singapore 238863"
}
-{
-Point: {
-coordinates: [
103.833
1.30376
0
]
}
-AddressDetails: {
-Country: {
CountryName: "Singapore"
AddressLine: "Wisma Atria"
-Thoroughfare: {
-PostalCode: {
PostalCodeNumber: "238877"
}
ThoroughfareName: "435 Orchard Road"
}
CountryNameCode: "SG"
}
Accuracy: 9
}
id: "p3"
address: "Wisma Atria, 435 Orchard Road, Singapore 238877"
}
-{
-Point: {
-coordinates: [
103.835
1.30389
0
]
}
-AddressDetails: {
-Country: {
CountryName: "Singapore"
-Thoroughfare: {
-PostalCode: {
PostalCodeNumber: "238860"
}
ThoroughfareName: "291 Orchard Road"
}
CountryNameCode: "SG"
}
Accuracy: 9
}
id: "p4"
address: "291 Orchard Road, Singapore 238860"
}
-{
-Point: {
-coordinates: [
103.834
1.30491
0
]
}
-AddressDetails: {
-Country: {
CountryName: "Singapore"
AddressLine: "Kimsia Park"
-Thoroughfare: {
-PostalCode: {
PostalCodeNumber: "228968"
}
ThoroughfareName: "1 Jalan Kayu Manis"
}
CountryNameCode: "SG"
}
Accuracy: 9
}
id: "p5"
address: "Kimsia Park, 1 Jalan Kayu Manis, Singapore 228968"
}
]
}

I have some code working, but I'm finding the nested nature of this to be pretty tough to figure out. What I'd like to get out is an array/dictionary which contains the following elements for each return record: coordinates, CountryName, ThoroughfareName, PostalCode and Accuracy.

Here is my test code so far:

- (void)viewDidLoad {
    [super viewDidLoad];

    NSURL *jsonURL = [NSURL URLWithString:@"http://gothere.sg/maps/geo?output=json&ll=1.304044%2C103.833867&client=&sensor=false&callback="];

    NSString *jsonData = [[NSString alloc] initWithContentsOfURL:jsonURL];

    self.jsonArray = [jsonData JSONValue]; 

    NSLog(@"%@", jsonArray);

    [jsonURL release];
    [jsonData release];
}

My code just manages to get the raw JSON output, any thoughts/code to break it down as I've mentioned above.

Thanks!

As requested, some further information.

Using SBJson framework.

NSLog output from above:

2011-08-30 16:44:32.605 Taxi[53070:207] {
Placemark =     (
            {
        AddressDetails =             {
            Accuracy = 9;
            Country =                 {
                CountryName = Singapore;
                CountryNameCode = SG;
                Thoroughfare =                     {
                    ThoroughfareName = "Bus stop at Lucky Plaza (09048)";
                };
            };
        };
        Point =             {
            coordinates =                 (
                "103.834",
                "1.30396",
                0
            );
        };
        address = "Bus stop at Lucky Plaza (09048)";
        id = p1;
    },
            {
        AddressDetails =             {
            Accuracy = 9;
            Country =                 {
                AddressLine = "Lucky Plaza";
                CountryName = Singapore;
                CountryNameCode = SG;
                Thoroughfare =                     {
                    PostalCode =                         {
                        PostalCodeNumber = 238863;
                    };
                    ThoroughfareName = "304 Orchard Road";
                };
            };
        };
        Point =             {
            coordinates =                 (
                "103.834",
                "1.30444",
                0
            );
        };
        address = "Lucky Plaza, 304 Orchard Road, Singapore 238863";
        id = p2;
    },
            {
        AddressDetails =             {
            Accuracy = 9;
            Country =                 {
                AddressLine = "Wisma Atria";
                CountryName = Singapore;
                CountryNameCode = SG;
                Thoroughfare =                     {
                    PostalCode =                         {
                        PostalCodeNumber = 238877;
                    };
                    ThoroughfareName = "435 Orchard Road";
                };
            };
        };
        Point =             {
            coordinates =                 (
                "103.833",
                "1.30376",
                0
            );
        };
        address = "Wisma Atria, 435 Orchard Road, Singapore 238877";
        id = p3;
    },
            {
        AddressDetails =             {
            Accuracy = 9;
            Country =                 {
                CountryName = Singapore;
                CountryNameCode = SG;
                Thoroughfare =                     {
                    PostalCode =                         {
                        PostalCodeNumber = 238860;
                    };
                    ThoroughfareName = "291 Orchard Road";
                };
            };
        };
        Point =             {
            coordinates =                 (
                "103.83499999999999",
                "1.30389",
                0
            );
        };
        address = "291 Orchard Road, Singapore 238860";
        id = p4;
    },
            {
        AddressDetails =             {
            Accuracy = 9;
            Country =                 {
                AddressLine = "Kimsia Park";
                CountryName = Singapore;
                CountryNameCode = SG;
                Thoroughfare =                     {
                    PostalCode =                         {
                        PostalCodeNumber = 228968;
                    };
                    ThoroughfareName = "1 Jalan Kayu Manis";
                };
            };
        };
        Point =             {
            coordinates =                 (
                "103.834",
                "1.30491",
                0
            );
        };
        address = "Kimsia Park, 1 Jalan Kayu Manis, Singapore 228968";
        id = p5;
    }
);
Status =     {
    code = 200;
    name = "1.304044,103.833867";
    request = geocode;
};

}

Also what framework are you using to parse your JSON? Have you tried JSONLint to see if the JSON validates? — Devraj
– Devraj, Commented Aug 30, 2011 at 8:35
you can get all the dictionaries from the JSON data in an array and then use valueForKey method to retrieve countryName,Thouroughfare name etc.... — stack2012
– stack2012, Commented Aug 30, 2011 at 8:57
@booleanBoy - I've come across what you've suggested, but am uncertain how to implement... any suggestions please? — MrDB
– MrDB, Commented Aug 30, 2011 at 9:00

Parth Bhatt · Accepted Answer · 2011-08-30 12:12:55Z

3

Try this :

//NSMutableArray *addressDetails = [[NSMutableArray alloc] init];
NSMutableArray *addressDetails = [[jsonArray valueForKey:@"Placemark"] valueForKey:@"AddressDetails"];

  //NSMutableArray *point = [[NSMutableArray alloc] init];
NSMutableArray *point = [[jsonArray valueForKey:@"Placemark"] valueForKey:@"Point"];

NSLog(@"%@", point);
NSLog(@"%@", [point objectAtIndex:0]);

NSLog(@"%@", addressDetails);

Like wise you can get array of "id" and "address" value also.

To get value of "coordinates" of point array, do this

NSLog(@"%@", [[point objectAtIndex:0] valueForKey:@"coordinates"]);

For AddressDetails/Country/CountryName :

NSLog(@"%@", [[[addressDetails objectAtIndex:0] valueForKey:@"Country"] valueForKey:@"CountryName"]);

edited Aug 30, 2011 at 12:12

Parth Bhatt

19.5k28 gold badges137 silver badges216 bronze badges

answered Aug 30, 2011 at 9:32

spaleja

1,43515 silver badges26 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Parth Bhatt Over a year ago

@spaleja: Where will be the arrays addressDetails and point be released? This code leaks memory.

spaleja Over a year ago

you can release addressDetails and point array, once you will get invidual array from dictionary.

user792554 · Accepted Answer · 2011-08-30 09:04:07Z

0

Your json is invalid, try to test it on http://jsonviewer.stack.hu/ once it becames valid then only you can use it. You must have used the SBJSON framework to parse it.

answered Aug 30, 2011 at 9:04

user792554

12 bronze badges

1 Comment

MrDB Over a year ago

Appears valid to me, see here: jsonviewer.stack.hu/#http://gothere.sg/maps/…

Collectives™ on Stack Overflow

How do I parse this nested JSON output in Objective C?

2 Answers 2

2 Comments

1 Comment

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Linked

Related