Unity 错误 CS0236：字段初始值设定项无法引用非静态字段、方法或属性“UnitySampleAssets._2D.Camera2DFollow.Characters”

Question

我意识到有数百页与此错误相关。然而，我已经查看了其中的许多内容，但无法找到与我的特定问题相关的内容，因此，如果这是重复的线程，我深表歉意。我正在尝试修改 Unity 提供的 2D 相机脚本，以将其“目标”（它遵循的游戏对象）选择为用户选择的任何角色。我是 C# 新手，所以我不太清楚如何处理这个错误。我发布了整个代码以防万一，但错误应该可以在前 10 行左右找到

using UnityEngine;

namespace UnitySampleAssets._2D
{

    public class Camera2DFollow : MonoBehaviour
    {
        private string character = PlayerPrefs.GetString("Character")
        public Transform target = Transform.Find(character);
        public float damping = 1;
        public float lookAheadFactor = 3;
        public float lookAheadReturnSpeed = 0.5f;
        public float lookAheadMoveThreshold = 0.1f;

        private float offsetZ;
        private Vector3 lastTargetPosition;
        private Vector3 currentVelocity;
        private Vector3 lookAheadPos;

        // Use this for initialization
        private void Start()
        {
            lastTargetPosition = target.position;
            offsetZ = (transform.position - target.position).z;
            transform.parent = null;
        }

        // Update is called once per frame
        private void Update()
        {

            // only update lookahead pos if accelerating or changed direction
            float xMoveDelta = (target.position - lastTargetPosition).x;

            bool updateLookAheadTarget = Mathf.Abs(xMoveDelta) >                    lookAheadMoveThreshold;

            if (updateLookAheadTarget)
            {
                lookAheadPos =       lookAheadFactor*Vector3.right*Mathf.Sign(xMoveDelta);
            }
            else
            {
                lookAheadPos = Vector3.MoveTowards(lookAheadPos, Vector3.zero, Time.deltaTime*lookAheadReturnSpeed);
            }

            Vector3 aheadTargetPos = target.position + lookAheadPos + Vector3.forward*offsetZ;
            Vector3 newPos = Vector3.SmoothDamp(transform.position, aheadTargetPos, ref currentVelocity, damping);

            transform.position = newPos;

            lastTargetPosition = target.position;
        }
    }
}

Answer 1

不能用另一个变量初始化一个变量

private string character = PlayerPrefs.GetString("Character")
public Transform target = Transform.Find(character); // <---- Trying to access 'character' which is a variable

而是将其放入Start()方法中

private void Start()
{
    target = Transform.Find(character); // <---- here
    lastTargetPosition = target.position;
    offsetZ = (transform.position - target.position).z;
    transform.parent = null;
}