Question Double Array (Custom Editor)

Basicly, what I am trying to do, is to display a double array as one.
Let me explain better.
--> First I have a list of strings

Code (CSharp):

1. [HideInInspector]
2. public List<string> ThemesList = new List<string>();

-->Then in the custom Editor I display it as a Drop Down Menu

Code (CSharp):

1. GUIContent themeList = new GUIContent("Theme Mode");
2. code.SelecteedThemeIndex = EditorGUILayout.Popup(themeList, code.SelecteedThemeIndex, code.ThemesList.ToArray());

(code.SelecteedThemeIndex being my choice, (everything works just fine here))
--> Now I have an array of Images

Code (CSharp):

1. public Image[][] ThemeArray = new Image[5][];

' 5 ' being the maximum allowed number.
--> to display it, In custom Editor I use

Code (CSharp):

1. Image[][] array = code.ThemeArray;
2.  
3.             code.showImages = EditorGUILayout.Foldout(code.showImages, "Themes List");
4.             if (code.showImages)
5.             {
6.                 EditorGUI.indentLevel++;
7.                 code.ObjectSize = Mathf.Max(0, EditorGUILayout.IntField("Size", code.ObjectSize));
8.  
9.                 for (int i = 0; i < code.ObjectSize; i++)
10.                 {
11.                     array[code.SelecteedThemeIndex][i] = (Image)EditorGUILayout.ObjectField("Theme " + i, array[code.SelecteedThemeIndex][i], typeof(Image), true);
12.                 }
13.  
14.                 EditorGUI.indentLevel--;
15.             }

I am trying to show in inspector an array of images, based on the selected Index.
(ex. on Index 0, there will be 3 images (img 1, img 2, img 3)
on Index 1, there will be also 3 images (img 1, img 4, img 5)
and I can switch the Index through the drop down menu, and the images(aka Arrays) will be swaped)

Until now, if I set the ObjectSize to anything but ' 0 ' it gives me this error


In Visual Studio (2019) there are no errors.

If you need the full code there it is:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEditor;
5. using UnityEngine.UI;
6.  
7. public class ThemesCoder : MonoBehaviour
8. {
9.     [HideInInspector]
10.     public List<string> ThemesList = new List<string>();
11.     [HideInInspector]
12.     public List<Image> Theme = new List<Image>();
13.     [HideInInspector]
14.     public int SelecteedThemeIndex = 0;
15.     [HideInInspector]
16.     public bool showList = false;
17.     [HideInInspector]
18.     public bool showImages = false;
19.     [HideInInspector]
20.     public Image[][] ThemeArray = new Image[5][];
21.     [HideInInspector]
22.     public int ObjectSize = 0;
23.     [HideInInspector]
24.     public int size = 0;
25.  
26.     [CustomEditor(typeof(ThemesCoder))]
27.     //[CanEditMultipleObjects]
28.     public class ThemeCoderEditor : Editor
29.     {
30.         public override void OnInspectorGUI()
31.         {
32.             base.OnInspectorGUI();
33.  
34.             DrawInspector();
35.         }
36.  
37.         public void DrawInspector()
38.         {
39.             ThemesCoder code = (ThemesCoder)target;
40.  
41.             #region Themes Modes List
42.          
43.            
44.             code.showList = EditorGUILayout.Foldout(code.showList, "Themes List");
45.             if (code.showList)
46.             {
47.                 EditorGUI.indentLevel++;
48.                 List<string> list = code.ThemesList;
49.                 code.size = Mathf.Max(0, EditorGUILayout.IntField("Size", list.Count));
50.  
51.                 while (code.size > list.Count)
52.                 {
53.                     list.Add(null);
54.                 }
55.  
56.                 while (code.size < list.Count)
57.                 {
58.                     list.RemoveAt(list.Count - 1);
59.                 }
60.  
61.                 for (int i = 0; i < list.Count; i++)
62.                 {
63.                     list[i] = EditorGUILayout.TextField("Theme " + i, list[i]);
64.                 }
65.                 EditorGUI.indentLevel--;
66.             }
67.             #endregion
68.  
69.             #region Curent Mode
70.             GUIContent themeList = new GUIContent("Theme Mode");
71.             code.SelecteedThemeIndex = EditorGUILayout.Popup(themeList, code.SelecteedThemeIndex, code.ThemesList.ToArray());
72.             #endregion
73.  
74.             EditorGUILayout.Space();
75.  
76.             #region Theme Game Object
77.            
78.             Image[][] array = code.ThemeArray;
79.  
80.             code.showImages = EditorGUILayout.Foldout(code.showImages, "Themes List");
81.             if (code.showImages)
82.             {
83.                 EditorGUI.indentLevel++;
84.                 code.ObjectSize = Mathf.Max(0, EditorGUILayout.IntField("Size", code.ObjectSize));
85.  
86.                 for (int i = 0; i < code.ObjectSize; i++)
87.                 {
88.                     array[code.SelecteedThemeIndex][i] = (Image)EditorGUILayout.ObjectField("Theme " + i, array[code.SelecteedThemeIndex][i], typeof(Image), true);
89.                 }
90.  
91.                 EditorGUI.indentLevel--;
92.             }
93.             #endregion
94.         }
95.     }
96. }

Hope you can help me.
Thank You anticiped.

 

So I resolved this problem, looks like when declaring the Array you must make it to null as default.
The code as for an example is here

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEditor;
5. using UnityEngine.UI;
6.  
7. public class ThemesCoder : MonoBehaviour
8. {
9.     [HideInInspector]
10.     public SpriteArray[] ThemeArray = null;
11.     [HideInInspector]
12.     public List<string> ThemesList = new List<string>();
13.     [HideInInspector]
14.     public List<Image> Theme = new List<Image>();
15.     [HideInInspector]
16.     public int SelecteedThemeIndex = 0;
17.     [HideInInspector]
18.     public bool showList = false;
19.     [HideInInspector]
20.     public bool showImages = false;
21.    
22.     [HideInInspector]
23.     public int ObjectSize = 0;
24.     [HideInInspector]
25.     public int size = 0;
26.  
27.     [CustomEditor(typeof(ThemesCoder))]
28.     //[CanEditMultipleObjects]
29.     public class ThemeCoderEditor : Editor
30.     {
31.         public override void OnInspectorGUI()
32.         {
33.             base.OnInspectorGUI();
34.  
35.             DrawInspector();
36.         }
37.  
38.         public void DrawInspector()
39.         {
40.             ThemesCoder code = (ThemesCoder)target;
41.  
42.             #region Themes Modes List
43.          
44.            
45.             code.showList = EditorGUILayout.Foldout(code.showList, "Themes List");
46.             if (code.showList)
47.             {
48.                 EditorGUI.indentLevel++;
49.                 List<string> list = code.ThemesList;
50.                 code.size = Mathf.Max(0, EditorGUILayout.IntField("Size", list.Count));
51.  
52.                 while (code.size > list.Count)
53.                 {
54.                     list.Add(null);
55.                 }
56.  
57.                 while (code.size < list.Count)
58.                 {
59.                     list.RemoveAt(list.Count - 1);
60.                 }
61.  
62.                 for (int i = 0; i < list.Count; i++)
63.                 {
64.                     list[i] = EditorGUILayout.TextField("Theme " + i, list[i]);
65.                 }
66.                 EditorGUI.indentLevel--;
67.             }
68.             #endregion
69.  
70.             #region Curent Mode
71.             GUIContent themeList = new GUIContent("Theme Mode");
72.             code.SelecteedThemeIndex = EditorGUILayout.Popup(themeList, code.SelecteedThemeIndex, code.ThemesList.ToArray());
73.             #endregion
74.  
75.             EditorGUILayout.Space();
76.  
77.             #region Theme Game Object
78.            
79.             SpriteArray[] array = code.ThemeArray;
80.  
81.             code.showImages = EditorGUILayout.Foldout(code.showImages, "Themes List");
82.             if (code.showImages)
83.             {
84.                 EditorGUI.indentLevel++;
85.                 code.ObjectSize = Mathf.Max(0, EditorGUILayout.IntField("Size", code.ObjectSize));
86.  
87.                 for (int i = 0; i < code.ObjectSize; i++)
88.                 {
89.                    
90.                     array[code.SelecteedThemeIndex].Sprites[i] = (Sprite)EditorGUILayout.ObjectField("Theme " + i, array[code.SelecteedThemeIndex].Sprites[i], typeof(Sprite), true);
91.  
92.                 }
93.                 EditorGUI.indentLevel--;
94.             }
95.             #endregion
96.         }
97.     }
98. }
99.  
100. [System.Serializable]
101. public struct SpriteArray
102. {
103.     public Sprite[] Sprites;
104. }