RequireComponent 属性は、必要なコンポーネントを依存関係として自動的に加えます。
RequireComponent を使ったスクリプトをゲームオブジェクトにアタッチすると、必要なコンポーネントが自動的にそのゲームオブジェクトに加えられるようになります。 これはセットアップエラーを回避するのに役に立ちます。 例えば、あるスクリプトでは Rigidbody が同じゲームオブジェクトに常に加えられる必要があるとします。 RequireComponent を使用することでこれを自動的に実行し、セットアップで間違えることがなくなります。 RequireComponent は、コンポーネントがゲームオブジェクトに加えられる時点で、欠落している依存関係のみを検知します。ゲームオブジェクトに新しい依存関係が欠落していても、そのコンポーネントのすでに存在しているインスタンスにそれらの欠落した依存関係が自動的に加えられるわけではありません。
using UnityEngine;
// PlayerScript requires the GameObject to have a Rigidbody component [RequireComponent(typeof(Rigidbody))] public class PlayerScript : MonoBehaviour { Rigidbody rb;
void Start() { rb = GetComponent<Rigidbody>(); }
void FixedUpdate() { rb.AddForce(Vector3.up); } }
RequireComponent | 1 つのコンポーネントを必要とします |
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