c# - 定时器在自身之上绘制，不清除

Question

有趣的问题!基本上我的 UI 有一个计时器，它从 99 开始倒计时。除了在旧时间之上绘制新时间之外，一切正常。 (之前的时间没有清除)虽然在 GameplayScreens 绘制调用中发生了明显的事情......它只是很奇怪。

这是我的相关函数:

GameplayScreen.cs(或我们常用的 Game1)

public override void Update(GameTime gameTime)
{
    m_GameUI.Update(gameTime);
    m_GameCam.lookAt(m_Hero.Position);//feeds the camera's lookAt function the players vector2 position
    m_GameUI.lookAt(m_GameCam.Position); //Look at the camera's position :D
}

public override void Draw(GameTime gameTime)
{

    ScreenManager.GraphicsDevice.Clear(ClearOptions.Target,
                                       Color.CornflowerBlue, 0, 0);

    SpriteBatch spriteBatch = ScreenManager.SpriteBatch;

    m_BackgroundManager.Draw(spriteBatch, m_GameCam);      
    //Begin the Spritebatch Drawing
    spriteBatch.Begin(SpriteSortMode.Immediate, null,
        null,
        null,
        null,
        null, m_GameCam.ViewMatrix);

    //Call EntityManager.DrawAllEntities()
    EntityManager.Instance.DrawAllEntities(gameTime, spriteBatch);

    //End the spritebatch drawing
    spriteBatch.End();

    spriteBatch.Begin();
    m_GameUI.Draw(gameTime, spriteBatch);
    m_PlayerUI.Draw(gameTime, spriteBatch);
    spriteBatch.End();
 }

GameUI.cs

SpriteFont m_Font;
double m_Timer;

public virtual void Update(GameTime gameTime)
{

    m_Timer -= gameTime.ElapsedGameTime.TotalSeconds;

}

public virtual void Draw(GameTime gameTime, SpriteBatch spriteBatch)
{

    spriteBatch.Draw(UITexture, Position, Color.White);
    spriteBatch.DrawString(m_Font, "" + (int)m_Timer + "", new Vector2(380, 45), Color.White);
}

Answer 1

最终成为一个非常愚蠢的错误，我有一个派生自调用 base.draw() 的 UI 的类，因此更新的时钟和原始值都同时显示在屏幕上。基本上代码设计不好，每个人刚开始都是新手吧？

感谢您的关注:)