Question

i have this data structure :

{ 
  "artistlist " : [ 
                    {
                      "performer" : "Gate Zero"
                    },
                    {
                      "performer" : "nightech"
                    },
                    {
                      "performer" : "Marko Fuerstenberg"
                    },

                  ] 
   }

I read this structure from NSString into NSDictionary with this line of code:

   JSON = [NSJSONSerialization JSONObjectWithData:
   [[chunks objectAtIndex:1]        
   dataUsingEncoding:NSUTF8StringEncoding] options:              
   NSJSONReadingMutableContainers error: &e];

with: [JSON objectForKey:@"artistlist "] i get this structure:

(
    {
    performer = "Gate Zero";
},
    {
    performer = nightech;
},
    {
    performer = "Marko Fuerstenberg";
}
)

Is there any way to go “deeper” ?

how would i parse the resulting Structure ?

I would like to get a list of values or access performer names directly. What if i have several values in a tupel for example performer name, album, year. How would i access those values?

Thank you.

Answer 1

Yes, after you have [JSON objectForKey:@"artistlist "], you get an NSArray of NSDictionaries (slightly confusing!).

NSArray *performersArray = [JSON objectForKey:@"artistlist"];  
for (NSDictionary *performerDic in performersArray) {
    NSLog(@"%@", [performerDic objectForKey:@"performer"]);
}

This should yield each performer name. Alternatively, you can do for (NSUInteger i = 0; i < [performersArray count]; i++) and access NSDictionary *performersDic = [performersArray objectAtIndex: i]. From there, you can similarly use [performsDic objectForKey:@"performer"]