在 OSX 上的 MonoGame 中的公共游戏 1() 中需要帮助异常

Question

所以我正在尝试创建这个在学校的Visual Studio 2012中完美运行的程序。

但是当我在家时，它会在Public Game1()给我这个抛出异常错误。

希望有人可以帮助我解决这个问题，这样我就可以实际运行我的程序并完成它。

调用堆栈为：

System.NullReferenceException：对象引用未设置为实例 在 Microsoft.Xna.Framework.OpenTKGameWindow.Initialize （） [0x00000] 在 ：0 在 Microsoft.Xna.Framework.OpenTKGameWindow..克托尔 （） [0x00000] 在 :0 在 Microsoft.Xna.Framework.OpenTKGamePlatform..克托尔 （Microsoft.Xna.Framework.Game game）[0x00000] in ：0 at Microsoft.Xna.Framework.GamePlatform.Create （Microsoft.Xna.Framework.Game game）[0x00000] in ：0 在Microsoft.Xna.Framework.Game..ctor （） [0x00000] in ：0 在MonoGameTest.Game1..克托尔 （） [0x00023] 在 /Users/sebnabt/Projects/MonoGameTest/MonoGameTest/Game1.cs：38 at MonoGameTest.Program.Main （） [0x00001] in /Users/sebnabt/Projects/MonoGameTest/MonoGameTest/Program.cs：19

和我的代码：

<!-- language: lang-cs -->
region Using Statements
using System; 
using System.Collections.Generic; 
using System.Linq; 
using Microsoft.Xna.Framework; 
using Microsoft.Xna.Framework.Graphics; 
using Microsoft.Xna.Framework.Storage; 
using Microsoft.Xna.Framework.Input;
endregion
namespace MonoGameTest 
{
/// <summary>
/// This is the main type for your game
/// </summary>
public class Game1 : Game
{
 GraphicsDeviceManager graphics;
 SpriteBatch spriteBatch;
 // Maps user keys to display colors
 Dictionary<Keys, Color> key_to_color = new Dictionary<Keys, Color>();
 // these are the colors guessed by the user, so far.
 List<Color>[] player_colors = new List<Color>[10];
 // these are the keys that correspond to a dot color
 List<Keys> color_letters = new List<Keys>();
 Texture2D dot_picture;
 KeyboardState old_keyboard_state;
 int row;        
 public Game1() : base()
 {
     graphics = new GraphicsDeviceManager(this);
     Content.RootDirectory = "Content";
     base.Initialize ();
 } 
 /// <summary>
 /// Allows the game to perform any initialization it needs to before starting to run.
 /// This is where it can query for any required services and load any non-graphic
 /// related content.  Calling base.Initialize will enumerate through any components
 /// and initialize them as well.
 /// </summary>
 /// 
 /// // screen constants
 const int SCREEN_WIDTH = 640;
 const int SCREEN_HEIGHT = 480;

 protected override void Initialize()
 {
     row = 0;
     // back buffer
     graphics.PreferredBackBufferHeight = SCREEN_HEIGHT;
     graphics.PreferredBackBufferWidth = SCREEN_WIDTH;
     graphics.PreferMultiSampling = false;
     graphics.ApplyChanges();
     base.Initialize();
     // initialize the color dictionary
     key_to_color.Add(Keys.R, Color.Red);
     key_to_color.Add(Keys.G, Color.Green);
     key_to_color.Add(Keys.B, Color.Blue);
     key_to_color.Add(Keys.Y, Color.Yellow);
     color_letters = new List<Keys>();
     foreach (Keys letter in key_to_color.Keys)
     {
        color_letters.Add(letter);
     }
  }
  /// <summary>
  /// LoadContent will be called once per game and is the place to load
  /// all of your content.
  /// </summary>
  protected override void LoadContent()
  {
    // Create a new SpriteBatch, which can be used to draw textures.
    spriteBatch = new SpriteBatch(GraphicsDevice);
    // load our textures
    dot_picture = Content.Load<Texture2D>(@"mediaball");
  }
  /// <summary>
  /// Allows the game to run logic such as updating the world,
  /// checking for collisions, gathering input, and playing audio.
  /// </summary>
  /// <param name="gameTime">Provides a snapshot of timing values.</param>
  protected override void Update(GameTime gameTime)
  {
    // get keyboard state once per frame
    KeyboardState keyState = Keyboard.GetState();
    // exit the game?
    if (keyState.IsKeyDown(Keys.Escape))
    {
        this.Exit();
    }
    // erase list of player colors?
    else if (keyState.IsKeyDown(Keys.Space))
    {
        player_colors[this.row].Clear();
    }
    // player pressed a color key?
    else {
        foreach (Keys letter in color_letters)
        {
            if (key_was_released(letter, keyState))
            {
                add_color(letter);  
            }
            if (this.player_colors [row].Count () >= 4) {
                this.row = this.row + 1;
            }
        }
    }

    old_keyboard_state = keyState;
    base.Update(gameTime);
}
protected override void UnloadContent() {
}
bool key_was_released(Keys key, KeyboardState new_state)
{
    return old_keyboard_state.IsKeyDown(key) && 
        new_state.         IsKeyUp  (key);
}
void add_color(Keys key)
{
    Color color = key_to_color[key];
    if (player_colors[this.row].Count() < 4)
    {
        player_colors[this.row].Add(color);
    }
}
/// <summary>
/// This is called when the game should draw itself.
/// </summary>
/// <param name="gameTime">Provides a snapshot of timing values.</param>
protected override void Draw(GameTime gameTime)
{
    graphics.GraphicsDevice.Clear (Color.CornflowerBlue);
    // draw typical sprites
    spriteBatch.Begin ();
    draw_player_colors (spriteBatch);
    spriteBatch.End ();
    base.Draw (gameTime);
}
protected void draw_player_colors(SpriteBatch batch)
{
    for (int current_row = 0; current_row < 10; current_row++) {
        for (int column = 0; column < player_colors[current_row].Count(); column++) {
            int x = 100 + column * 70;
            int y = 100 + column * 70;
            Vector2 loc = new Vector2 (x, y);
            Color c = player_colors[current_row].ElementAt (column);
            batch.Draw (dot_picture, loc, c);
        }
    }
}
}
}

最新错误：

看起来我已经让它稍微工作了一下，但是我现在在基本模板中收到错误：logoTexture = Content.Load<Texture2D>("logo");

错误将在下面

Microsoft.Xna.Framework.Content.ContentLoadException：无法加载 徽标资产作为非内容文件！--->系统异常： 找不到目录。--->系统异常：找不到 路径的一部分 "/Users/sebnabt/Projects/BSMac/BSMac/bin/Debug/BSMac.app/Content/Resources/Content/logo.xnb"。 在System.IO.FileStream..ctor （系统字符串路径， 文件模式， 文件访问访问、文件共享共享、Int32 缓冲区大小、布尔值 匿名，文件选项选项）[0x001c6] in /private/tmp/source/bockbuild-xamarin/profiles/mono-mac-xamarin-no-pcl/build-root/mono-3.2.0/mcs/class/corlib/System.IO/FileStream.cs：266 在System.IO.FileStream..ctor （系统字符串路径， 文件模式， 文件访问访问，文件共享共享） [0x00000] 在 /private/tmp/source/bockbuild-xamarin/profiles/mono-mac-xamarin-no-pcl/build-root/mono-3.2.0/mcs/class/corlib/System.IO/FileStream.cs：132 at at （wrapper remoting-invoke-with-check） System.IO.FileStream：.ctor （string，System.IO.FileMode，System.IO.FileAccess，System.IO.FileShare）
at System.IO.File.OpenRead （System.String path） [0x00000] in /private/tmp/source/bockbuild-xamarin/profiles/mono-mac-xamarin-no-pcl/build-root/mono-3.2.0/mcs/class/corlib/System.IO/File.cs：341 at Microsoft.Xna.Framework.TitleContainer.OpenStream （System.String 名称） [0x00000] 在 ：0 中 在 Microsoft.Xna.Framework.Content.ContentManager.OpenStream （系统字符串资产名称）[0x00000] in ：0 --- 结束 的内部异常堆栈跟踪--- Microsoft.Xna.Framework.Content.ContentManager.OpenStream （系统字符串资产名称）[0x00000] in ：0 在 Microsoft.Xna.Framework.Content.ContentManager.ReadAsset[Texture2D] （System.String assetName， System.Action 1 recordDisposableObject) [0x00000] in <filename unknown>:0 --- End of inner exception stack trace --- at at Microsoft.Xna.Framework.Content.ContentManager.ReadAsset<Microsoft.Xna.Framework.Graphics.Texture2D> (string,System.Action 1） <0x0076b> at Microsoft.Xna.Framework.Content.ContentManager.Load （string） <0x0020b> at BSMac.Game1.LoadContent （） [0x00023] in /Users/sebnabt/Projects/BSMac/BSMac/Game1.cs：70 at at Microsoft.Xna.Framework.Game.Initialize （） at BSMac.Game1.Initialize （） [0x00002] in /Users/sebnabt/Projects/BSMac/BSMac/Game1.cs：57 at at Microsoft.Xna.Framework.Game.DoInitialize （）
at at Microsoft.Xna.Framework.Game.Run （Microsoft.Xna.Framework.GameRunBehavior） at at Microsoft.Xna.Framework.Game.Run （） at BSMac.AppDelegate.DoneLaunch （MonoMac.Foundation.NSObject） [0x00012] in/Users/sebnabt/Projects/BSMac/BSMac/Main.cs：34 at at （包装器动态方法）对象。[BSMac.AppDelegate.Void FinishLaunching（MonoMac.Foundation.NSObject）] （MonoMac.Foundation.NSObject，MonoMac.ObjCRuntime.Selector，MonoMac.Foundation.NSObject） at at （包装器本机到托管） 对象。[BSMac.AppDelegate.Void FinishLaunching（MonoMac.Foundation.NSObject）] （MonoMac.Foundation.NSObject，MonoMac.ObjCRuntime.Selector，MonoMac.Foundation.NSObject） at at （包装器托管到本机） MonoMac.AppKit.NSApplication.NSApplicationMain （int，string[]） <0x00003> at at MonoMac.AppKit.NSApplication.Main （string[]） at BSMac.Program.Main （string[]） [0x0001d] in /Users/sebnabt/Projects/BSMac/BSMac/Main.cs：20 at

Answer 1

你在 Xamarin Studio 中构建吗？ 我相信您遇到了几天前问题中描述的相同问题;看到我的答案：https://stackoverflow.com/a/18798311/793449

回顾一下，Xamarin Studio 正在选择 WindowsGL 框架程序集而不是 mac 程序集。 您应该从最新的源代码（MonoGame.Framework.MacOS项目）自己构建MonoGame，并在游戏中更改引用。