Unity-GetComponent擴張方法
如果transform沒有component 會自動加上
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
static public class ExtensionsTransform
{
/// <summary>
/// Gets or add a component. Usage example:
/// BoxCollider boxCollider = transform.GetOrAddComponent<BoxCollider>();
/// </summary>
static public T GetOrAddComponent<T>(this Component child) where T : Component
{
T result = child.GetComponent<T>();
if (result == null)
{
result = child.gameObject.AddComponent<T>();
}
return result;
}
}
