How to get the values from nested JSON - Objective c - ios

Question

I am trying to get some keys and values from below nested JSON response. Below I have mentioned my JSON response structure, I need to get the all keys(Red, Green) and key values(Color and ID) from the below response and load into the Array for tableview cell value.
FYI: I have tried by using NSDictionary but I am getting all the time unordered values. I need to get ordered values also. Please help me!
{
response: {
RED: {
Color: "red",
color_id: "01",
},
GREEN: {
Color: "green",
color_id: "02",
}
},
Colorcode: { },
totalcolor: "122"
}
My Code:
NSError *error;
NSDictionary *jsonDictionary = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSArray *responsData = [jsonDictionary objectForKey:#"response"];
NSLog("%#",[responsData objectAtIndex:0]); // here I am getting bad exception
NSDictionary *d1 = responsData.firstObject;
NSEnumerator *enum1 = d1.keyEnumerator;
NSArray *firstObject = [enum1 allObjects];

Answer 1

I have create JSON data through coding so don't consider it just check the following answer
/// Create dictionary from following code
/// it just for input as like your code
NSMutableDictionary * dict = [[NSMutableDictionary alloc] init];
NSMutableDictionary * innr = [[NSMutableDictionary alloc] init];
[innr setObject:#"red" forKey:#"Color"];
[innr setObject:#"01" forKey:#"color_id"];
NSMutableDictionary * outer = [[NSMutableDictionary alloc] init];
[outer setObject:innr forKey:#"RED"];
innr = [[NSMutableDictionary alloc] init];
[innr setObject:#"green" forKey:#"Color"];
[innr setObject:#"02" forKey:#"color_id"];
[outer setObject:innr forKey:#"GREEN"];
[dict setObject:outer forKey:#"response"];
// ANS ------ as follow
// get keys from response dictionary
NSMutableArray * key = [[NSMutableArray alloc] initWithArray:[dict[#"response"] allKeys]];
// sort as asending order
NSSortDescriptor* sortOrder = [NSSortDescriptor sortDescriptorWithKey: #"self" ascending: YES];
key = (NSMutableArray *)[key sortedArrayUsingDescriptors: [NSArray arrayWithObject: sortOrder]];
// access inner data from dictonary
for (NSString * obj in key) {
NSLog(#"%#",dict[#"response"][obj][#"Color"]);
NSLog(#"%#",dict[#"response"][obj][#"color_id"]);
}
I think you want same and it will help you!

Answer 2

If you're stuck with this JSON, if you want an array of the values, you can do the following:
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSDictionary *response = json[#"response"];
NSArray *colors = [response allValues];
If you need that array of colors sorted by color_id, for example, you can sort that yourself:
NSArray *sortedColors = [colors sortedArrayUsingDescriptors:#[[[NSSortDescriptor alloc] initWithKey:#"color_id" ascending:TRUE]]];