Question

我正在尝试使用Unity2D编写我的第一款游戏'Tappy Bird'。当我尝试运行应用程序时，我在Unity中收到以下错误消息：

Assets / scripts / TapController.cs（6,6）：错误CS0592：属性 UnityEngine.RequireComponent对此声明类型无效。它仅在类声明上有效

代码：

using System.Collections;

using System.Collections.Generic;

using UnityEngine;


public class NewBehaviourScript : MonoBehaviour

{
    [RequireComponent(typeof(Rigidbody2D))]

    public float tapForce = 10;

    public float tiltSmooth = 5;
    public Vector3 startPos;
    Rigidbody2D rigidbody;
    Quaternion downRotation;
    Quaternion forwardRotation;

    void Start()
    {
        rigidbody = GetComponent<Rigidbody2D();
        downRotation = Quaternion.Euler(0, 0, -90);
        forwardRotation = Quaternion.Euler(0, 0, 35);
    }

    void update()
    {
        if (input.GetMouseButtonDown(0))
        {
            transform.rotation = forwardRotation;
            rigidbody.AddForce(vector2.up * tapForce, ForceMode2D.Force);
        }
        transform.rotation = Quaternion.Lerp(
            transform.rotation, downRotation, tiltSmooth * Time.deltaTime);
    }

    void onTriggerEnter2D(Collider2D col){
        if(col.gameObject.tag == "ScoreZone") {
            //register a Score event
            //play sound
        }
        if(col.gmeObject.tag == "DeadZone") {
            //register a dead event
            //play a sound
        }
    }
}

Answer 1

如果我理解你的代码，你应该在类声明之前添加属性：

[RequireComponent(typeof(Rigidbody2D))] public class NewBehaviourScript : MonoBehaviour { ... }

Answer 2

需要在类之外设置将所需组件添加为依赖项的RequireComponent属性。

https://docs.unity3d.com/ScriptReference/RequireComponent.html

Answer 3

https://docs.unity3d.com/ScriptReference/RequireComponent.html

首先，它应该在类名的前面；

第二，如果您已将脚本附加到游戏对象，则需要重新附加。

[RequireComponent(typeof(Rigidbody2D))]
public class NewBehaviourScript : MonoBehaviour
{
    //...
}

UnityEngine.RequireComponent属性在此声明类型上无效。它仅对类声明有效

3 个答案: