，我不能讓我的精靈移動

Question

我在XNA一個完整的新手，我目前從本教程學習：第五個步驟完成後運行程序時出現

http://msdn.microsoft.com/en-us/library/bb203893.aspx

的問題。我不認爲這是一個錯字，因爲其他人在評論中指出了同樣的問題。

我的精靈意味着當我的程序運行時自動彈出屏幕，但是即使是0,0像素也不會移動。

using System; 
using System.Collections.Generic; 
using System.Linq; 
using Microsoft.Xna.Framework; 
using Microsoft.Xna.Framework.Audio; 
using Microsoft.Xna.Framework.Content; 
using Microsoft.Xna.Framework.GamerServices; 
using Microsoft.Xna.Framework.Graphics; 
using Microsoft.Xna.Framework.Input; 
using Microsoft.Xna.Framework.Media; 

namespace WindowsGame1 
{ 

public class Game1 : Microsoft.Xna.Framework.Game 
{ 
    GraphicsDeviceManager graphics; 
    SpriteBatch spriteBatch; 

    public Game1() 
    { 
     graphics = new GraphicsDeviceManager(this); 
     Content.RootDirectory = "Content"; 
    } 


    protected override void Initialize() 
    { 


     base.Initialize(); 
    } 

    Texture2D myTexture; 

    Vector2 spritePosition = Vector2.Zero; 

    Vector2 spriteSpeed = new Vector2(50.0f, 50.0f); 

    protected override void LoadContent() 
    { 

     spriteBatch = new SpriteBatch(GraphicsDevice); 
     myTexture = Content.Load<Texture2D>("Main"); 

    } 


    protected override void UnloadContent() 
    { 

    } 


    void UpdateSprite(GameTime gameTime) 
    { 
     //Move the sprite by speed, scaled by elapsed time 

     spritePosition += 
      spriteSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds; 

     int MaxX = 
      graphics.GraphicsDevice.Viewport.Width - myTexture.Width; 
     int MinX = 0; 

     int MaxY = 
      graphics.GraphicsDevice.Viewport.Height - myTexture.Height; 
     int MinY = 0; 

     //Check for bounce. 
     if (spritePosition.X > MaxX) 
     { 
      spriteSpeed.X *= -1; 
      spritePosition.X = MaxX; 

     } 

     else if (spritePosition.X < MinX) 
     { 
      spriteSpeed.X *= -1; 
      spritePosition.X = MinX; 

     } 

     if (spritePosition.Y > MaxY) 
     { 
      spriteSpeed.Y *= -1; 
      spritePosition.Y = MaxY; 
     } 

     else if (spritePosition.Y < MinY) 
     { 
      spriteSpeed.Y *= -1; 
      spritePosition.Y = MinY; 
     } 


    } 


    protected override void Draw(GameTime gameTime) 
    { 
     GraphicsDevice.Clear(Color.CornflowerBlue); 



     spriteBatch.Begin(SpriteSortMode.BackToFront, BlendState.AlphaBlend); 
     spriteBatch.Draw(myTexture, spritePosition, Color.White); 
     spriteBatch.End(); 

     base.Draw(gameTime); 
    } 
    } 
} 

Answer 1

UpdateSprite方法不從任何地方叫...

你應該重寫更新方法，並從那裏打電話給你UpdateSprite方法...

編輯：

此加入你的遊戲類：

protected override void Update(GameTime gameTime) 
{ 
    UpdateSprite(gameTime); 
}