Add and remove data from JSON file

Question

I added to the project the file Objects.json which contains the following code:

{
"circle": [
       [1, 3], [2, 1], [3, 2],
],
"line": [
       [2, 1], [3, 2], [1, 3],
],
"A_Letter": [
       [3, 3], [2, 1], [1, 2],
    ],
}

How could I add to this file a new key?

If, for instance, I want to remove the "line" key, how could this be done?

You'd need to parse the JSON, modify the result, then reserialise it. — Qantas 94 Heavy, Jun 28 '14 at 11:08

score 2 · Accepted Answer · answered Jun 28 '14 at 11:17

2

Try this may be helpfull, In this I solve JSON and remove key as you wants ..

 NSString *str = @"{\"circle\": [       [1, 3], [2, 1], [3, 2],],\"line\": [       [2, 1], [3, 2], [1, 3],],\"A_Letter\": [       [3, 3], [2, 1], [1, 2],    ]}";
  NSMutableDictionary *datadic = [NSJSONSerialization JSONObjectWithData:[str dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:nil];
  [datadic removeObjectForKey:@"line"];
 NSLog(@"data return %@",datadic);

Thanks

answered Jun 28 '14 at 11:17

Jogendra.Com

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Thanks! I'm going to try this – Massimo Piazza Jun 28 '14 at 11:21
It's working fine in my code. I have tested this .. thanks and accept my answer :) – Jogendra.Com Jun 28 '14 at 11:22
also can accept on click right arrow ... – Jogendra.Com Jun 28 '14 at 11:28
-1 for not checking for errors. – Hot Licks Jun 28 '14 at 12:31

score 0 · Answer 2 · answered Jun 28 '14 at 11:27

Since this is the arrays of dictionary. So for adding into the dictionary use setObject: ForKey: method and for removing use removeObjectForKey: like that below:-

 NSMutableDictionary *mutDict=[yourjsonDict mutableCopy];
 [mutDict setObject: @[@[1,2],@[2,3]] forKey:@"yourKey"];

  // now for removing 
  [mutDict removeObjectForKey:@"line"];

Add and remove data from JSON file

2 Answers2