Ammo count Xna / Monogame - xna

Question

I'm trying to minus 1 from the Player Ammo every time the spacebar is pressed.
However anytime I press the space bar, it subtracts a lot more then one from the Player Ammo int.
Here's my code:
int player1Ammo = 5;
Retrieve the current state of the keyboard:
KeyboardState keyboardState = Keyboard.GetState();
KeyboardState _previousKeyboardState = keyboardState;
if (Keyboard.GetState().IsKeyDown(Keys.Space))
{
player1Ammo -= 1; FireBullet();
}
How do I fix that issue I'm getting?

Answer 1

In your case if (Keyboard.GetState().IsKeyDown(Keys.Space)) mean not "if Space pressed". It mean "while Space pressed", becouse game call Update method 60 (by default) times per second. You cannot press and release button faster then 1/60 second, so while it pressed each time this expression will be true. And each time it repeat your code.
Do it like that:
class Game1 : Game
{
private bool isKeyPressed;
void Update()
{
KeyboardState keyboardState = Keyboard.GetState();
if (keyboardState.IsKeyDown(Keys.Space))
{
if (!isKeyPressed)
{
isKeyPressed = true;
// do what you need when key pressed
}
}
else if(keyboardState.IsKeyUp(Keys.Space))
{
if (isKeyPressed)
{
isKeyPressed = false;
// do what you need when key released
}
}
}
}
Update
My own solution on BitBucket (write me if link will be broken).
Create instance of CustomKeyInputManager, register keys you want and update it every frame. Check when keys pressed, released, hold and so on.