无法退出游戏，而在菜单状态

Question

我试图添加退出功能，让玩家退出我的游戏在不同的阶段。我目前有它的设置，使他们可以按下逃生按钮，而在游戏中退出。但是我无法在游戏主菜单或游戏结束菜单中添加相同的功能。

下面是我的简化代码:

// Game State Improvment
        // An enumeration for the different states in the game
        public enum GameState
        {
            GameMenu = 0,
            GamePlay = 1,
            GameOver = 2
        }
        // A variable to hold the current state
        GameState currentGameState;
/// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Update(GameTime gameTime)
        {
            switch (currentGameState)
            {
                case GameState.GameMenu:
                    // commented in order to start the game without a menu
                    if (GamePad.GetState(PlayerIndex.One).Buttons.Start == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Enter))
                    {
                        levelIndex = 0;
                        LoadNextLevel();
                        level.Player.PlayerLives = 3;
                        currentGameState = GameState.GamePlay;
                    }
                    break;
                case GameState.GameOver:
                    if (GamePad.GetState(PlayerIndex.One).Buttons.A == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Enter))
                    {
                        levelIndex = 0;
                        LoadNextLevel();
                        level.Player.PlayerLives = 3;
                        currentGameState = GameState.GamePlay;
                    }
                    //Add your game over update code here...
                    break;
                case GameState.GamePlay:
                    // Handle polling for our input and handling high-level input
                    HandleInput();
                    // update our level, passing down the GameTime along with all of our input states
                    level.Update(gameTime, keyboardState, gamePadState, touchState,
                                 accelerometerState, Window.CurrentOrientation);
                    break;
            }
            // If the ESC key is pressed, skip the rest of the update.
            if (exitKeyPressed() == false)
            {
                base.Update(gameTime);
            }
        }
        bool exitKeyPressed()
        {
            // Check to see whether ESC was pressed on the keyboard or BACK was pressed on the controller.
            if (keyboardState.IsKeyDown(Keys.Escape) || gamePadState.Buttons.Back == ButtonState.Pressed)
            {
                Exit();
                return true;
            }
            return false;
        }
protected override void Draw(GameTime gameTime)
        {
           // Game State Improvment
            switch (currentGameState)
            {
                case GameState.GameMenu:
                    //// Start drawing
                    spriteBatch.Begin();
                    spriteBatch.Draw(mainBackGround, Vector2.Zero, Color.Green);
                    //Stop drawing
                    spriteBatch.End();
                    break;
                case GameState.GameOver:
                    //// Start drawing
                    spriteBatch.Begin();
                    //graphics.GraphicsDevice.Clear(Color.Green);
                    spriteBatch.Draw(gameOverBackGround, Vector2.Zero, Color.Green);
                    //// Stop drawing
                    spriteBatch.End();
                    break;
                case GameState.GamePlay:
                    graphics.GraphicsDevice.Clear(Color.CornflowerBlue);
                    spriteBatch.Begin();
                    level.Draw(gameTime, spriteBatch);
                    DrawHud();
                    spriteBatch.End();
                    break;
            }
            base.Draw(gameTime);
        }

我怎么能让玩家退出游戏时，在GameOver和游戏菜单游戏?

谢谢

Answer 1

在其他两种情况下，您不调用HandleInput。

移动到switch语句的前面