Objective-C

Find and Delete Object from JSON Array

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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]);