如何在Objective C中解析此嵌套的JSON输出？

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.

1. Using SBJson framework.

2. 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.