让Unity的Inspector面板支持字符限制(restrict)功能

/* ==============================================================================
* 功能描述：限制string字段的输入类型
* 创 建 者：shuchangliu
* ==============================================================================*/

using System.Text.RegularExpressions;
using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

public class RestrictAttribute : PropertyAttribute
{
public string restrict;
// Use this for initialization
public RestrictAttribute(string restrict)
{
this.restrict = restrict;
}
}

#if UNITY_EDITOR
[CustomPropertyDrawer(typeof(RestrictAttribute))]
public class RestrictDrawer : PropertyDrawer
{
public override float GetPropertyHeight(SerializedProperty property,
GUIContent label)
{
return EditorGUI.GetPropertyHeight(property, label, true);
}

public override void OnGUI(Rect position,
SerializedProperty property,
GUIContent label)
{
RestrictAttribute a = attribute as RestrictAttribute;

EditorGUI.PropertyField(position, property, label, true);
string v = property.stringValue;
v = Regex.Replace(v, @"[^" + a.restrict + "]*", "");
property.stringValue = v;
}

}
#endif

public class Test : MonoBehaviour
{
[Restrict("0-9a-fA-F")]
public string pid;
}