错误CS0120：需要对象引用才能访问非静态成员

Question

Unity相当新颖，我已经通过我的游戏获得了不太多的打嗝，但我难以忍受这一次。 我得到的错误是：

资产/脚本/ Interactables/ButtonMoveObject.cs（25,55）：错误CS0120：一个对象引用需要访问非静态成员`Inventory.CheckItem（库存.items）'

我似乎无法弄清楚，有什么想法？

using UnityEngine; 
using System.Collections; 

public class ButtonMoveObject : MonoBehaviour { 

//Object name to link to button 
public GameObject buttonReceiver = null; 

//Target for moved objects and time it takes 
private Vector3 source; 
public Vector3 target; 
public float overTime; 

//Prerequesites required to operate it 
public Inventory.items[] pres; 

//Flag to keep checking prerequisites and check count 
private bool checkFlag = true; 
private int checkCount = 0; 

void Use() 
{ 
    if (pres.Length > 0) { 
     while (checkFlag) { 
      checkFlag = Inventory.CheckItem(pres[checkCount]); 
      if (checkCount == pres.Length) { 
       if (checkFlag) { 
        checkFlag = false; 
        StartCoroutine (MoveObject()); 
       } 
      } 
      checkCount++; 
     } 
    } 
} 

IEnumerator MoveObject() 
{ 
    source = buttonReceiver.transform.position; 
    float startTime = Time.time; 
    while(Time.time < startTime + overTime) 
    { 
     buttonReceiver.transform.position = Vector3.Lerp(source, target, (Time.time - startTime)/overTime); 
     yield return null; 
    } 
    buttonReceiver.transform.position = target; 
} 

} 

编辑：

好吧，我已经与checkFlag = player.GetComponent<Inventory>().CheckItem(pres[checkCount]); 固定，但现在我得到一个错误Assets/Scripts/Player/Inventory.cs(21,30): error CS0176: Static member Inventory.items.keycardGreen' cannot be accessed with an instance reference, qualify it with a type name instead 在我的库存脚本

using UnityEngine; 
using System.Collections; 

public class Inventory : MonoBehaviour { 

public enum items 
{ 
    keycardGreen, 
    keycardRed 
}; 

//Inventory List 
[HideInInspector] 
public bool keycardGreen = false; 
[HideInInspector] 
public bool keycardRed = false; 

public void CollectItem (items newItem) 
{ 
    switch (newItem) { 
    case newItem.keycardGreen: 
     keycardGreen = true; 
     Debug.Log(newItem + " collected."); 
     break; 
    case newItem.keycardRed: 
     keycardRed = true; 
     Debug.Log(newItem + " collected."); 
     break; 
    default: 
     break; 
    } 
} 

public bool CheckItem (items checkItem) 
{ 
    switch (checkItem) { 
    case checkItem.keycardGreen: 
     return keycardGreen; 
     break; 
    case checkItem.keycardRed: 
     return keycardRed; 
     break; 
    default: 
     Debug.Log("Item does not exist."); 
     break; 
    } 
} 
} 

Answer 1

您也需要类的一个实例库存：

Inventory inv = new Inventory(); 
while (checkFlag) { 
    checkFlag = inv.CheckItem(pres[checkCount]); 
    if (checkCount == pres.Length) { 
     if (checkFlag) { 
      checkFlag = false; 
      StartCoroutine (MoveObject()); 
     } 
    } 
    checkCount++; 
} 

或CheckItem方法是静态的：

static bool CheckItem(Inventory.items item) {... }