Objective-C

Find and Delete Object from JSON Array

See more JSON Examples

Demonstrates how to find an delete an object from a JSON array of objects. Objective-C

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

BOOL success = NO;

// This example will delete the "Pasta" category object from Menu B.

// {
//   "menus": [
//     {
//       "name": "Menu A",
//       "categories": [
// 			{
// 			"name": "Kebabs",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Burgers",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Pasta",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Appetizers",
// 			"description": "blah blah blah"
// 			}
// 		]
// 	},
//     {
//       "name": "Menu B",
//       "categories": [
// 			{
// 			"name": "Kebabs",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Burgers",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Pasta",
// 			"description": "blah blah blah"
// 			},
// 			{
// 			"name": "Appetizers",
// 			"description": "blah blah blah"
// 			}
// 		]
// 	  }
// 	]
// }

CkoJsonObject *json = [[CkoJsonObject alloc] init];
success = [json LoadFile: @"qa_data/json/menus.json"];
if (success == NO) {
    NSLog(@"%@",json.LastErrorText);
    return;
}

// Find Menu B.
CkoJsonObject *menu = [json FindRecord: @"menus" relPath: @"name" value: @"Menu B" caseSensitive: YES];
// assume menu is found..

// Get the categories array, and then find the index of the "Pasta" menu category.
CkoJsonArray *catArr = [menu ArrayOf: @"categories"];
// Assume it is found..

// Find the object where the name of the JSON member is "name", and the value is "Pasta"
int index = [[catArr FindObject: @"name" value: @"Pasta" caseSensitive: YES] intValue];
if (index < 0) {
    NSLog(@"%@",@"Pasta not found.");
}
else {

    // Delete the "Pasta" category record from Menu B
    success = [catArr DeleteAt: [NSNumber numberWithInt: index]];
    // Assume OK..
}

// Examine the JSON to see if it worked as expected..
json.EmitCompact = NO;
NSLog(@"%@",[json Emit]);