我正在嘗試從我的GameController.cs腳本訪(fǎng)問(wèn)協(xié)程，協(xié)程位于我的DatabaseManager.cs腳本中。我正在嘗試像這樣訪(fǎng)問(wèn)協(xié)程： DatabaseManager d1 = new DatabaseManager(); d1.uploadData();這給了我一個(gè)空引用異常。我知道在我嘗試訪(fǎng)問(wèn)的協(xié)程中一切正常，因?yàn)檫@些腳本與我制作的另一個(gè)項(xiàng)目完全相同，唯一的區(qū)別是在另一個(gè)項(xiàng)目中我通過(guò)一個(gè)運(yùn)行良好的動(dòng)畫(huà)事件調(diào)用協(xié)程，但是試圖通過(guò)這個(gè)項(xiàng)目中的代碼調(diào)用它給了我這個(gè)問(wèn)題。數(shù)據(jù)庫(kù)管理器腳本附加到 Player 游戲?qū)ο髷?shù)據(jù)庫(kù)管理器腳本using UnityEngine;using UnityEngine.Networking;using System.Collections;using UnityEngine.UI;using CompanionLibrary; //include my library to utilise its functions//use neccessary libraries.    //This class handles sending game data to the database.    public class DatabaseManager : MonoBehaviour    {        //declare variables to hold data values.        static string username;        string password;        int score =0;        int kills=0;  //initialise variables to 0         int bulletsFired=0;        int bulletsHit=0;        int bulletsMissed=0;        int timePlayed = 0;        int scorePerMin=0;        StatGeneration companion = new StatGeneration();        //On awake function to check if sign in or logged in booleans are set.        public void Awake()        {        if (ButtonManagers.signedUp == true) //if signedUp boolean is true....            {                username = ButtonManagers.signUpUsername; //assign the username to equal the signUpUsername value.                password = ButtonManagers.signUpPassword; //assign the password to equal the signUpPassword value.            Debug.Log("Username: " + username);            Debug.Log("Password: " + password);        }            //if loggedIn boolean is true....            if (ButtonManagers.loggedIn == true)            {                username = ButtonManagers.loginUsername;//assign the username to equal the loggedInUsername value.                password = ButtonManagers.loginPassword;//assign the password to equal the loggedInPassword value.            }        }