对象引用未设置为对象的实例(unity3d c#错误)

Question

我收到这个错误，我正在使用unity 2020.3.25f1。(见图了解第45行。(

在此处输入图像描述

请帮助解决此问题。

感谢

NullReferenceException：对象引用未设置为对象的实例BBG.PopupManager.Awake(((位于Assets/Sudoku/Framework/Scripts/Popup/PopupManager.cs:45(

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
namespace BBG
{
public class PopupManager : SingletonComponent<PopupManager>
{
#region Classes
[System.Serializable]
private class PopupInfo
{
[Tooltip("The popups id, used to show the popup. Should be unique between all other popups.")]
public string popupId = "";
[Tooltip("The Popup component to show.")]
public Popup popup = null;
}
#endregion
#region Inspector Variables
[SerializeField] private List<PopupInfo> popupInfos = null;
#endregion
#region Member Variables
private List<Popup> activePopups;
#endregion
#region Unity Methods
protected override void Awake()
{
base.Awake();
activePopups = new List<Popup>();
for (int i = 0; i < popupInfos.Count; i++)
{
popupInfos[i].popup.Initialize();
}
}
#endregion
#region Public Methods
public void Show(string id)
{
Show(id, null, null);
}
public void Show(string id, object[] inData)
{
Show(id, inData, null);
}
public void Show(string id, object[] inData, Popup.PopupClosed popupClosed)
{
Popup popup = GetPopupById(id);
if (popup != null)
{
if (popup.Show(inData, popupClosed))
{
activePopups.Add(popup);
}
}
else
{
Debug.LogErrorFormat("[PopupController] Popup with id {0} does not exist", id);
}
}
public bool CloseActivePopup()
{
if (activePopups.Count > 0)
{
int index = activePopups.Count - 1;
Popup popup = activePopups[index];
if (popup.CanAndroidBackClosePopup)
{
popup.Hide(true);
}
return true;
}
return false;
}
public void OnPopupHiding(Popup popup)
{
for (int i = activePopups.Count - 1; i >= 0; i--)
{
if (popup == activePopups[i])
{
activePopups.RemoveAt(i);
break;
}
}
}
#endregion
#region Private Methods
private Popup GetPopupById(string id)
{
for (int i = 0; i < popupInfos.Count; i++)
{
if (id == popupInfos[i].popupId)
{
return popupInfos[i].popup;
}
}
return null;
}
#endregion
}

}

Answer 1

您的错误在这里

[SerializeField] private List<PopupInfo> popupInfos = null;

你可以尝试这个，但它不会给你任何东西，除了它会隐藏一个异常，但你必须从的某个地方获得popupInfos列表

[SerializeField] private List<PopupInfo> popupInfos = new List<PopupInfo>();