c# - 程序没有响应，调试显示 'Value cannot be null'

Question

using System;

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace Shooter
{
  class Player
   {
    //Animation representing player
    public Texture2D PlayerTexture;
    //Position of player relative to left side of screen
    public Vector2 Position;
    public bool playerActive;
    public int playerHealth;
    public int Width
    {
        get { return PlayerTexture.Width; }
    }

    public int Height
    {
        get { return PlayerTexture.Height; }
    }



    public void Initialize(Texture2D texture, Vector2 position)
    {
        PlayerTexture = texture;

        //sets the position of player to middle of the screen

        Position = position;

        playerActive = true;

        playerHealth = 100;


    }



    public void Update()
    {

    }


    public void Draw(SpriteBatch spriteBatch)
    {
        spriteBatch.Draw(PlayerTexture, Position, null, Color.White, 0f, Vector2.Zero, 1f, SpriteEffects.None, 0f);
    }

}
}

这是我的代码，用于我的播放器类，程序没有编译错误。但是，当我运行游戏时，它显示“Game1 已停止响应”，而当我调试时，出现一条错误消息，显示“值不能为空”。我在这里遵循使用 XNA 进行 Windows 游戏开发的教程:

https://blogs.msdn.microsoft.com/tarawalker/2012/12/10/windows-8-game-development-using-c-xna-and-monogame-3-0-building-a-shooter-game-walkthrough-part-2-creating-the-shooterplayer-asset-of-the-game/ .

谢谢!

Answer 1

查看错误和您的代码，我想这是您唯一的类(class)？如果是这样，您使用的教程有点奇怪。因为它肯定涵盖了初学者 Material ，但它跳过了一些关键信息。

在 monogame 中，您的第一个类应该始终继承自 Game 类。对于 monogame/XNA 中游戏的基本结构，我建议您阅读以下文章:http://rbwhitaker.wikidot.com/monogame-project-template