Question

Possible Duplicate:
How to use NSJSONSerialization

I am testing to use the web service of my website on iphone Application.
The JSON with problem is that:

[
    {
        "name": "Jason1",
        "age": 20
    },
    {
        "name": "Jason2",
        "age": 40
    },
    {
        "name": "Jason3",
        "age": 60
    }
]

And my codes:

   NSData *jasonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://localhost:3000/all_personal_information.json"]];
    NSDictionary *json = nil;
    if (jasonData) {
        json = [NSJSONSerialization JSONObjectWithData:jasonData options:kNilOptions error:nil];
    }

The code work fine with {"name":"jason","age":20}
and I can get the values by using json[@"name"] and json[@"age"]

But i don’t know how to get the value from the JSON with problem.
I tried to use [json enumerateKeysAndObjectsWithOptions] to transverse the dictionary.
But I will get an error:

enumerateKeysAndObjectsWithOptions:usingBlock:]: unrecognized selector sent to instance 0x89b2490

But I can get the full JSON when I Log the [json description] into console.

Answer 1

Take it in an array.. for example

NSData *jasonData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://localhost:3000/all_personal_information.json"]];
NSDictionary *json = nil;
if (jasonData) {
    NSError *e = nil;
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:jasonData options:NSJSONReadingMutableContainers error: &e];
}

the array will contain your

{
 "name": "Jason1",
 "age": 20
}

etc in its individual indexes. when u want to get the values in it, you can use this below method to get the values

NSDictionary *userName = [jsonArray objectAtIndex:1];
NSString *stringName = [userName valueForKey:@"name"];