SerializedProperty.minArraySize

描述

所有目标对象中数组元素的最小数量。（只读）

如果 SerializedObject 包含多个对象，则此属性返回元素的最小数量。与 SerializedProperty.arraySize 不同，即使最小大小大于 SerializedObject.maxArraySizeForMultiEditing，也会返回最小大小。在这种情况下，可以增大 SerializedObject.maxArraySizeForMultiEditing 以允许访问数组内容。

当 SerializedObject 仅包含单个对象时，此属性的行为与 SerializedProperty.arraySize 相同，并返回真实的数组大小。

其他资源： arraySize、isArray、SerializedObject.targetObjects。

using UnityEditor;
using UnityEngine;

public class MinArraySizeExample : ScriptableObject
{
    public int[] m_data;

    [MenuItem("Example/SerializedProperty MinArraySize Example")]
    static void TestMethod()
    {
        const int largeArraySize = 100; // Larger than the default maxArraySizeForMultiEditing value of 64

        MinArraySizeExample obj1 = ScriptableObject.CreateInstance<MinArraySizeExample>();
        obj1.m_data = new int[largeArraySize];

        for (int i = 0; i < largeArraySize; i++)
            obj1.m_data[i] = i;

        // Second object with its own copy of the large array
        MinArraySizeExample obj2 = ScriptableObject.CreateInstance<MinArraySizeExample>();
        obj2.m_data = obj1.m_data;

        // Create serialized object for manipulating both objects
        SerializedObject serializedObject = new SerializedObject(new Object[] { obj1, obj2 });
        SerializedProperty property = serializedObject.FindProperty("m_data");

        // arraySize returns 0 but minArraySize returns largeArraySize
        Debug.LogFormat("Array Size: {0}\nMin Array Size: {1}\nMax Array Size: {2}",
            property.arraySize, property.minArraySize, serializedObject.maxArraySizeForMultiEditing);

        // Any call to GetArrayElementAtIndex() at this point would fail

        // Extend the max permitted array size
        serializedObject.maxArraySizeForMultiEditing = property.minArraySize;

        // Now arraySize returns largeArraySize, and the elements can be retrieved
        Debug.LogFormat("New Array Size: {0}, Last element: {1}", property.arraySize, property.GetArrayElementAtIndex(largeArraySize - 1).intValue);
    }
}