How to add NSArray object which is located inside NSMutableDictionary and NSArray property?

sonoDamiano

How can I add item for the "kArrayOfItemsInTheBox" key in the structure like below?

NSArray* arrayOfBoxes = @[
                       [NSMutableDictionary dictionaryWithDictionary:@{
                                                                       kArrayOfItemsInTheBox : [NSArray arrayWithObjects:@"1",@"2", nil],
                                                                       kBoxNumber : @"Box nr 1",
                                                                       }
                        ],

                       [NSMutableDictionary dictionaryWithDictionary:@{
                                                                       kArrayOfItemsInTheBox : [NSArray arrayWithObjects:@"1",@"2", nil],
                                                                       kBoxNumber : @"Box nr 2",
                                                                       }
                        ]
                       ];
self.packageData = [NSMutableArray arrayWithArray:arrayOfBoxes];

I know how to display items from the array but I have a trouble with adding new object at the end of the existing list . I need to add this value by using packageData property. The final result after add new values should look like below structure:

 NSArray* arrayOfBoxes = @[
                       [NSMutableDictionary dictionaryWithDictionary:@{
                                                                       kArrayOfItemsInTheBox : [NSArray arrayWithObjects:@"1",@"2",@"Added Item", nil],
                                                                       kBoxNumber : @"Box nr 1",
                                                                       }
                        ],

                       [NSMutableDictionary dictionaryWithDictionary:@{
                                                                       kArrayOfItemsInTheBox : [NSArray arrayWithObjects:@"1",@"2", nil],
                                                                       kBoxNumber : @"Box nr 2",
                                                                       }
                        ]
                       ];

I try something like:

[[self.packageData objectAtIndex:myIndex]addObject:@{kArrayOfItemsInTheBox:@"NewValue" }];

If it is impossible to do maybe you have better idea how to create structure with the same logic. Thanks in advance

Paul.s

The simplest way with your current structure is

NSMutableDictionary *item = [self.packageData objectAtIndex:myIndex];
item[kArrayOfItemsInTheBox] = [item[kArrayOfItemsInTheBox] arrayByAddingObject:newObject];

Generally as soon as I have to use constants for keys in a dictionary I consider creating a custom object instead

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