contentHash
Provides the hash value for the property. (Read Only)
Read time 1 minuteLast updated 9 days ago
Definition
- Type: Property
- Namespace: UnityEditor
- Assembly: UnityEditor.CoreModule
public uint contentHash { get; }
Remarks
You can use this to track if there has been any changes to the value at the property path (Additional Resources: SerializedProperty.propertyPath).
Please note that:
-If the size of the property's content is smaller than or equal to 32 bits, then the content will be returned instead of a hash.
-If the property path leads to an array or complex type, the hash will correspond to the entire content.
-If the property is a field with [SerializeReference] attribute, or a compound type that contains such a field, then the content hashing doesn't include the content of the referenced object, instead it only hashes the reference id (Additional Resources: SerializedProperty.managedReferenceId).
Examples
using UnityEngine;using UnityEditor;public class MyObject : ScriptableObject{ public string myString = "answer to life the universe and everything"; public string[] myStringArray = { "answer", "to", "life", "the", "universe", "and", "everything" }; public int[] myIntArray = { 42, 442, 422, 4242 }; [MenuItem("Example/Output contentHash from SerializedProperty")] static void OutputContentHashFromSerializedProperty() { var scriptableObject = ScriptableObject.CreateInstance<MyObject>(); using (var serializedObject = new SerializedObject(scriptableObject)) { SerializedProperty serializedPropertyMyString = serializedObject.FindProperty("myString"); SerializedProperty serializedPropertyMyStringArray = serializedObject.FindProperty("myStringArray"); SerializedProperty serializedPropertyMyIntArray = serializedObject.FindProperty("myIntArray"); uint myStringHash = serializedPropertyMyString.contentHash; uint myStringArrayHash = serializedPropertyMyStringArray.contentHash; uint MyIntArrayHash = serializedPropertyMyIntArray.contentHash; serializedPropertyMyString.stringValue = "new string"; serializedPropertyMyIntArray.DeleteArrayElementAtIndex(1); serializedObject.ApplyModifiedPropertiesWithoutUndo(); Debug.Log(string.Format("myString: before={0}, after={1}, changed={2}", myStringHash, serializedPropertyMyString.contentHash, myStringHash == serializedPropertyMyString.contentHash ? "no" : "yes")); Debug.Log(string.Format("myStringArrayHash: before={0}, after={1}, changed={2}", myStringArrayHash, serializedPropertyMyStringArray.contentHash, myStringArrayHash == serializedPropertyMyStringArray.contentHash ? "no" : "yes")); Debug.Log(string.Format("MyIntArrayHash: before={0}, after={1}, changed={2}", MyIntArrayHash, serializedPropertyMyIntArray.contentHash, MyIntArrayHash == serializedPropertyMyIntArray.contentHash ? "no" : "yes")); } }}