当我试图移动到一个列表中的不同项目时，它会更改不同列表中的项目，但无法弄清楚。当我让它移动第一个列表时，然后当我尝试单击 Enter 以尝试让它切换列表时，它什么也不做。这是代码：
public void Update(GameTime gameTime, Game1 game)
{
keyboard = Keyboard.GetState();
mouse = Mouse.GetState();
//Checks if the up arrow has been pressed and released
if (CheckKeyboard(Keys.Up))
{
if (Selected.Equals("None"))
{
if (selected > 0) selected--;
else selected = (buttonList.Count - 1);
}
else if (Selected.Equals("Play"))
{
}
else if (Selected.Equals("LevelSelect"))
{
//This is what is meant to happen while sChapter1 = 0 but the error is it is
//moving one of the other lists
if (sChapter1 == 0)
{
if (sChapter > 0) sChapter--;
else sChapter = (chapterList.Count - 1);
}
//This is what should happen when enter is pressed on the first chapter
else if (sChapter1 == 1)
{
if (sC1Level > 0) sC1Level--;
else sC1Level = (c1LevelList.Count - 1);
}
//This is what should happen when enter is pressed on the second chapter
else if (sChapter1 == 2)
{
if (sC2Level > 0) sC2Level--;
else sC2Level = (c2LevelList.Count - 1);
}
//This is what should happen when enter is pressed on the third chapter
else if (sChapter1 == 3)
{
if (sC3Level > 0) sC3Level--;
else sC3Level = (c3LevelList.Count - 1);
}
}
}
//Checks if the down arrow is pressed and released
if (CheckKeyboard(Keys.Down))
{
if (Selected.Equals("None"))
{
if (selected < buttonList.Count - 1) selected++;
else selected = 0;
}
else if (Selected.Equals("Play"))
{
}
else if (Selected.Equals("LevelSelect"))
{
//This is what is meant to happen while sChapter1 = 0 but the error is it is
//moving one of the other lists
if (sChapter1 == 0)
{
if (sChapter < chapterList.Count - 1) sChapter++;
else sChapter = 0;
}
//This is what should happen when enter is pressed on the first chapter key
else if (sChapter1 == 1)
{
if (sC1Level < c1LevelList.Count - 1) sC1Level++;
else sC1Level = 0;
}
//This is what should happen when enter is pressed on the second chapter
else if (sChapter1 == 2)
{
if (sC2Level < c2LevelList.Count - 1) sC2Level++;
else sC2Level = 0;
}
//This is what should happen when enter is pressed on the third chapter
else if (sChapter1 == 3)
{
if (sC3Level < c3LevelList.Count - 1) sC3Level++;
else sC3Level = 0;
}
}
}
if (CheckKeyboard(Keys.Enter))
{
//Checks if the selected item is a certain one in the list to
//cause something to happen.
if (selected == buttonList.Count - 1) Game1.GameState = "Menu";
//Sets it to draw the LevelSelect portion of the menu
if (selected == buttonList.Count - 2) Selected = "LevelSelect";
if (selected == buttonList.Count - 3) Selected = "Play";
//Checks what chapter of the games it is on so that it can choose levels within the
//chapter. This should only effect when a chapter is selected and enter is pressed
//but it is effecting whether the chapterlist is being scrolled thru or if the
//levellists are.
if (sChapter == chapterList.Count - 1) sChapter1 = 3;
if (sChapter == chapterList.Count - 2) sChapter1 = 2;
if (sChapter == chapterList.Count - 3) sChapter1 = 1;
}
if (CheckKeyboard(Keys.Back))
{
//Ignore this, it hasn't been used yet
}
prevMouse = mouse;
prevKeyboard = keyboard;
}
public bool CheckKeyboard(Keys key)
{
//Checks if the key has been pressed and released
return (keyboard.IsKeyUp(key) && prevKeyboard.IsKeyDown(key));
}
注意：我弄清楚问题是什么，在我的 CheckKeyboard(Keys.Enter) 中它同时在做这两个。所以它跳过了一个列表，我试过让线程进入睡眠状态，但它仍然在做，有什么建议吗？