(Objective-C) Create more Complex JSON Document

Sample code to create the following JSON document:

    {  
        "Title": "The Cuckoo's Calling",  
        "Author": "Robert Galbraith",  
        "Genre": "classic crime novel",  
        "Detail": {  
            "Publisher": "Little Brown",  
            "Publication_Year": 2013,  
            "ISBN-13": 9781408704004,  
            "Language": "English",  
            "Pages": 494  
        },  
        "Price": [  
            {  
                "type": "Hardcover",  
                "price": 16.65  
            },  
            {  
                "type": "Kindle Edition",  
                "price": 7.00  
            }  
        ]  
    }  

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoJsonObject.h>
#import <CkoJsonArray.h>

CkoJsonObject *json = [[CkoJsonObject alloc] init];

BOOL success;

// The only reason for failure in the following lines of code would be an out-of-memory condition..

// An index value of -1 is used to append at the end.
int index = -1;

success = [json AddStringAt: [NSNumber numberWithInt: -1] name: @"Title" value: @"The Cuckoo's Calling"];
success = [json AddStringAt: [NSNumber numberWithInt: -1] name: @"Author" value: @"Robert Galbraith"];
success = [json AddStringAt: [NSNumber numberWithInt: -1] name: @"Genre" value: @"classic crime novel"];

// Let's create the Detail JSON object:
success = [json AddObjectAt: [NSNumber numberWithInt: -1] name: @"Detail"];
CkoJsonObject *detail = [json ObjectAt: [NSNumber numberWithInt: ([json.Size intValue] - 1)]];
success = [detail AddStringAt: [NSNumber numberWithInt: -1] name: @"Publisher" value: @"Little Brown"];
success = [detail AddIntAt: [NSNumber numberWithInt: -1] name: @"Publication_Year" value: [NSNumber numberWithInt: 2013]];
success = [detail AddNumberAt: [NSNumber numberWithInt: -1] name: @"ISBN-13" numericStr: @"9781408704004"];
success = [detail AddStringAt: [NSNumber numberWithInt: -1] name: @"Language" value: @"English"];
success = [detail AddIntAt: [NSNumber numberWithInt: -1] name: @"Pages" value: [NSNumber numberWithInt: 494]];

// Add the array for Price
success = [json AddArrayAt: [NSNumber numberWithInt: -1] name: @"Price"];
CkoJsonArray *aPrice = [json ArrayAt: [NSNumber numberWithInt: ([json.Size intValue] - 1)]];

// Entry entry in aPrice will be a JSON object.

// Append a new/empty ojbect to the end of the aPrice array.
success = [aPrice AddObjectAt: [NSNumber numberWithInt: -1]];
// Get the object that was just appended.
CkoJsonObject *priceObj = [aPrice ObjectAt: [NSNumber numberWithInt: ([aPrice.Size intValue] - 1)]];
success = [priceObj AddStringAt: [NSNumber numberWithInt: -1] name: @"type" value: @"Hardcover"];
success = [priceObj AddNumberAt: [NSNumber numberWithInt: -1] name: @"price" numericStr: @"16.65"];

success = [aPrice AddObjectAt: [NSNumber numberWithInt: -1]];
priceObj = [aPrice ObjectAt: [NSNumber numberWithInt: ([aPrice.Size intValue] - 1)]];
success = [priceObj AddStringAt: [NSNumber numberWithInt: -1] name: @"type" value: @"Kindle Edition"];
success = [priceObj AddNumberAt: [NSNumber numberWithInt: -1] name: @"price" numericStr: @"7.00"];

json.EmitCompact = NO;
NSLog(@"%@",[json Emit]);