• Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
3
Question by uulamock_unity · Oct 11, 2017 at 04:15 PM · c#editorarrayserializedproperty

How to access elements in an array through a SerializedProperty?

I am trying to modify the elements in an array via a SerializedProperty. However, I cannot seem to figure out how to. I can increase the array size and such, but I can't seem to directly access and modify an element in the array.

When it comes to single values, say a float, I can modify it as such:

 SerializedProperty m_Speed;
 
     public void OnEnable()
     {
         m_Speed = this.serializedObject.FindProperty("speed");
     }
 
 
     public override void OnInspectorGUI()
     {
         this.serializedObject.Update();
 
             EditorGUILayout.PropertyField(m_Speed);
             if(m_Speed.floatValue < 0)
             {
                 //Prevents value from going below 0
                 m_Speed.floatValue = 0f;
             }
 
         this.serializedObject.ApplyModifiedProperties();
     }


How can I do this with an array?

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

1 Reply

· Add your reply
  • Sort: 
avatar image
7
Best Answer

Answer by YoucefB · Oct 11, 2017 at 04:53 PM

Here is how it's done:

 SerializedProperty m_Speed;
     public void OnEnable()
     {
         m_Speed = this.serializedObject.FindProperty("speed");
     }
     public override void OnInspectorGUI(){
         serializedObject.Update ();
         for (int x = 0; x < m_Speed.arraySize; x++) {
             SerializedProperty property = m_Speed.GetArrayElementAtIndex (x); // get array element at x
             property.floatValue = Mathf.Max (0,property.floatValue); // Edit this element's value, in this case limit the float's value to a positive value.
         }
         EditorGUILayout.PropertyField(m_Speed,true); // draw property with it's children
         serializedObject.ApplyModifiedProperties ();
     }
Comment
Add comment · Show 3 · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image uulamock_unity · Oct 11, 2017 at 05:03 PM 0
Share

This is excellent, one last question before I mark this as the answer. How might this be done if the array is for GameObjects. Using your example above, would it be property.objectReferenceInstanceIDValue = new GameObject("obj") or property.objectReferenceValue = new GameObject("obj") ?

avatar image Bunny83 uulamock_unity · Oct 11, 2017 at 05:05 PM 1
Share

The second one.

avatar image YoucefB uulamock_unity · Oct 11, 2017 at 05:33 PM 2
Share

Yes the second one, so you want to fill the array with gameObjects, here is a quick example:

 SerializedProperty m_objects;
     List<GameObject> tempObjects;
     public void OnEnable()
     {
         m_objects = this.serializedObject.FindProperty("objects");
         tempObjects = new List<GameObject> ();
         for (int x = 0; x < m_objects.arraySize; x++) {
             tempObjects.Add((GameObject)m_objects.GetArrayElementAtIndex (x).objectReferenceValue); 
         }
     }
     public override void OnInspectorGUI(){
         serializedObject.Update ();
 
         for (int x = 0; x < m_objects.arraySize; x++) {
             SerializedProperty property = m_objects.GetArrayElementAtIndex (x)        ; // get array element at x
             if (property.objectReferenceValue == null) {
                 GameObject newObject =  new GameObject ("object " + x);
                 property.objectReferenceValue = newObject;
                 tempObjects.Add(newObject); // store it in the temp List
             }
         }
         EditorGUI.BeginChangeCheck (); // check if the size of the array has changed or one of the elements has been changed.
         EditorGUILayout.PropertyField(m_objects,true); // draw property with it's childs
         if (EditorGUI.EndChangeCheck()){
             for (int x = 0; x < tempObjects.Count; x++) {
                 if (x >= m_objects.arraySize || (tempObjects!=null&&m_objects.GetArrayElementAtIndex (x).objectReferenceValue==null))
                 DestroyImmediate (tempObjects[x].gameObject); // destroy the Objects that are not in the array
             }
         }
         serializedObject.Apply$$anonymous$$odifiedProperties ();
     }

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Welcome to Unity Answers

If you’re new to Unity Answers, please check our User Guide to help you navigate through our website and refer to our FAQ for more information.

Before posting, make sure to check out our Knowledge Base for commonly asked Unity questions.

Check our Moderator Guidelines if you’re a new moderator and want to work together in an effort to improve Unity Answers and support our users.

Follow this Question

Answers Answers and Comments

418 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

Insert new custom class element with _default_ values to a SerializedProperty array? 1 Answer

Initialising List array for use in a custom Editor 1 Answer

Multiple Cars not working 1 Answer

How to Save an multidimensional array trough editor script 1 Answer

Custom Editor + Array = A Long Nightmare ! 1 Answer


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges