Vstudio 2022/Unity2021.3.3f1 CS0103 和 CS0168

Question

我目前正在做一个“类灵魂”项目来帮助我学习 Unity/c#。我在 youtube 上找到了一个很棒的教程，并按照它进行了 T。但是在尝试测试第一段代码时，我 运行 进入许多 errors/warnings.

Error   CS0103  The name 'inputHandler' does not exist in the current context

这个错误出现在我多次命名和使用的多个变量上，但它无法弄清楚它们引用的是什么？我认为？我是一个完全的初学者，这真的让我很沮丧。我不确定该教程是否已过时并且 unity 中的输入控制系统是否已更新以对其中一些部分使用不同的名称？在这一点上，我什至不知道这是否有意义大声笑。这是“playerLocomotion”脚本的代码，“InputHandler”脚本没有错误，看起来没问题。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace NN
{
    public class PlayerLocomotion : MonoBehaviour
    {

        void Start()
        {
            Transform cameraObject;
            InputHandler inputHandler;
            Vector3 moveDirection;
        }
        [HideInInspector]
        public Transform myTransform;

        public new Rigidbody rigidbody;
        public GameObject normalCamera;

        [Header("Stats")]
        [SerializeField]
        float movementSpeed = 5;
        [SerializeField]
        float rotationSpeed = 10;

        void start()
        {
            rigidbody = GetComponent<Rigidbody>();
            inputHandler = GetComponent<InputHandler>();
            cameraObject = Camera.main.transform;
            myTransform = transform;

        }

        public void update()
        {
            float delta = Time.deltaTime;

            inputHandler.tickInput(delta);

            moveDirection = cameraObject.forward * inputHandler.vertical;
            moveDirection += cameraObject.right * inputHandler.horizontal;
            moveDirection.Normalize();

            float speed = movementspeed;
            moveDirection *= speed;

            Vector3 projectedVelocity = Vector3.ProjectOnPlane(moveDirection, normalVector);
            rigidbody.velocity = projectedVelocity;
        }

        #region Movement

        Vector3 normalVector;
        Vector3 targetPosition;

        private void HandleRotation(float delta)
        {
            Vector3 targetDir = Vector3.zero;
            float moveOverride = inputHandler.moveAmount;

            targetDir = cameraObject.forward * inputHandler.vertical;
            targetDir = normalcamera.right * inputHandler.Horizontal;

            targetDir.Normalize();
            targetDir.y = 0;
            if (targetDir == Vector3.zero)
                targetDir = myTransform.forward;

            float rs = rotationspeed;

            Quaternion tr = Quaternion.LookRotation(targetDir);
            Quaternion targetRotation = Quaternion.Slerp(myTransform.rotation, tr, rs * delta);

            myTransform.rotation = targetRotation;
        }

        #endregion
    }
}

Answer 1

Start 方法中定义的变量因其作用域而在其他任何地方都不可用。尝试将它们放在方法之外。本教程介绍了 c# https://www.tutorialsteacher.com/articles/variable-scopes-in-csharp

中的作用域

还有一些大写错误，所以我也在示例中更改了它们。我在它抛出错误的地方添加了评论。

我还想补充一点，最好在 class 的开头定义所有 class 关卡变量。这样你就不会忘记分散在 class.

中的变量

using UnityEngine;

namespace NN

{
    public class PlayerLocomotion : MonoBehaviour
    {
        
        //Putting these variables inside a method makes them method scoped variables, meaning that you can only access them inside this method
        //If you want to access them in the rest of the class they need to be defined in the class
        // void Start()
        // {
        //     Transform cameraObject;
        //     InputHandler inputHandler;
        //     Vector3 moveDirection;
        // }
        
        //This would be class level variables and these are now accessible in the rest of the class
        Transform cameraObject;
        InputHandler inputHandler;
        Vector3 moveDirection;
        
        [HideInInspector]
        public Transform myTransform;

        public new Rigidbody rigidbody;
        public GameObject normalCamera;

        [Header("Stats")]
        [SerializeField]
        float movementSpeed = 5;
        [SerializeField]
        float rotationSpeed = 10;

        void start()
        {
            rigidbody = GetComponent<Rigidbody>();
            inputHandler = GetComponent<InputHandler>();
            cameraObject = Camera.main.transform;
            myTransform = transform;

        }

        public void update()
        {
            float delta = Time.deltaTime;

            inputHandler.tickInput(delta);

            moveDirection = cameraObject.forward * inputHandler.vertical;
            moveDirection += cameraObject.right * inputHandler.horizontal;
            moveDirection.Normalize();

            // float speed = movementspeed; //This also contained a capitalization error
            float speed = movementSpeed; //Should be movementSpeed instead of movementspeed
            
            moveDirection *= speed;

            Vector3 projectedVelocity = Vector3.ProjectOnPlane(moveDirection, normalVector);
            rigidbody.velocity = projectedVelocity;
        }

        #region Movement

        Vector3 normalVector;
        Vector3 targetPosition;

        private void HandleRotation(float delta)
        {
            Vector3 targetDir = Vector3.zero;
            float moveOverride = inputHandler.moveAmount;

            targetDir = cameraObject.forward * inputHandler.vertical;
            // targetDir = normalcamera.right * inputHandler.Horizontal; //should also be normalCamera instead of normalcamera
            //The normalcamera is also a gameobject so it doesn't have a right, so you'll first have to get the transform
            targetDir = normalCamera.transform.right * inputHandler.Horizontal;
            
            targetDir.Normalize();
            targetDir.y = 0;
            if (targetDir == Vector3.zero)
                targetDir = myTransform.forward;

            // float rs = rotationspeed;//This should also be rotationSpeed instead of rotationspeed
            float rs = rotationSpeed;

            Quaternion tr = Quaternion.LookRotation(targetDir);
            Quaternion targetRotation = Quaternion.Slerp(myTransform.rotation, tr, rs * delta);

            myTransform.rotation = targetRotation;
        }

        #endregion
    }
}