自定义 Unity 的 Property Attribute_unity 自定义propertyattribute

1 首先定义特性 描述类，继承自 UnityEngine.PropertyAttribute

2 再定义特性的 绘制类，继承自 UnityEditor.PropertyDrawer，将描述类与绘制类绑定[UnityEditor.CustomPropertyDrawer(typeof(CustomRange))]

3 将特性添加到对应的 字段上

1 描述类

public class CustomRange : UnityEngine.PropertyAttribute{

}

public class CustomRange : PropertyAttribute
{
    public readonly int int_max;
    public readonly int int_min;
    
    public readonly float float_max;
    public readonly float float_min;
 
    public readonly Color color;
    public CustomRange(float min,float max,float r,float g,float b) {
        this.float_max = max;
        this.float_min = min;
        this.color = new Color(r,g,b,1);
    }
    public CustomRange(float min, float max)
    {
        this.float_max = max;
        this.float_min = min;
        this.color = Color.white;
    }
    public CustomRange(int min, int max)
    {
        this.int_max = max;
        this.int_min = min;
        this.color = Color.white;
    }
 
}

2 绘制类

[UnityEditor.CustomPropertyDrawer(typeof(CustomRange))]

public class CustomeRangePropertyDrawer : PropertyDrawer {

}

[CustomPropertyDrawer(typeof(CustomRange))]
public class CustomeRangePropertyDrawer : PropertyDrawer {
 
    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
 
        //base.OnGUI(position,property,label);
        if (property.propertyType ==  SerializedPropertyType.Float) {
            var range = attribute as CustomRange;
            GUI.color = range.color;
            //property.floatValue = EditorGUI.FloatField(position, label.text,Mathf.Clamp(property.floatValue, range.float_min, range.float_max));
            property.floatValue =  EditorGUI.Slider(position, label.text,property.floatValue,range.float_min,range.float_max);
            GUI.color = Color.white;
        }
        else if (property.propertyType == SerializedPropertyType.Integer)
        {
            var range = attribute as CustomRange;
            GUI.color = range.color;
            property.intValue = EditorGUI.IntField(position, label.text,Mathf.Clamp(property.intValue, range.int_min, range.int_max));
            //property.intValue = EditorGUI.Slider(position, label.text, property.intValue, range.int_min, range.int_max);
            GUI.color = Color.white;
        } 
    }
 
}

3 添加到 字段上

    [CustomRange(1f,100f,100,1,1f)]
    public float count = 0;
    [CustomRange(1, 100)]
    public int index = 0;

最终显示：

文件组织目录的要求：

CustomeRangePropertyDrawer的文件需要放在Editor目录下，否者编辑器使用没问题，但是打包会报错

参考： 

https://www.cnblogs.com/plateFace/p/4324937.html

https://mp.weixin.qq.com/s/kjoS2DaAADBUPMg1kHwnSg?