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

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;
};
}

Answer 1

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"]);

Answer 2

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.