I'm using LitJSON to load .json data, and I'm running some test code with a foreach loop, but it's not working.
InvalidOperationException: Instance of JsonData is not a dictionary
LitJson.JsonData.EnsureDictionary()
(this error is thrown when the foreach line is run)
using UnityEngine;
using LitJson;
using System.Collections;
using System.Collections.Generic;
using System.IO;
public void LoadData() {
JsonReader reader = new JsonReader("[1, 2, 3, 4, 5]");
JsonData data = JsonMapper.ToObject(reader);
foreach (JsonData i in data) {
Debug.Log("foreach: test");
}
}
According to the example in the documentation (Ctrl+F "foreach"; it's near the bottom of the page), I'm pretty sure this code should work (?).
Anyone have any ideas as to why this wouldn't work? Advice would be greatly appreciated!
Edit: The solution is to cast data to an IList object as follows:
foreach (JsonData i in data as IList) {
Debug.Log("foreach: " + i)
}
1 .Don't use foreach
on anything that is not array in Unity. It allocates memory mercilessly.
2 .Unity has a Built in Json
serialize called JsonUtility
. I suggest you use that. It currently does not support array and your question suggests you are using Json
array. There is a solution to get it work with array. Look here . Read from where it says 2. MULTIPLE DATA(ARRAY JSON) . Once you get it working, it will be easy to do next time and no external library required. I also recommend it because it faster than most other Json
libraries.
Note : You need Unity 5.3 and above to get this to work.
EDIT:
From my comment, this worked
foreach (var i in data as IList){
}
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