[游戏开发]【Unity】【ARPG开发日志】【51】如何通过GetKey实现GetKeyDown、GetKeyUp

很简单，可以通过记录当前状态和上次状态比对实现。

MyButton

public class MyButton
{
    public bool IsPressing = false;
    public bool OnPressed = false;
    public bool OnReleased = false;

    private bool curState = false;
    private bool lastState = false;

    public void Tick(bool input)
    {
        curState = input;
        IsPressing = curState;

        OnPressed = false;
        OnReleased = false;
        if(curState != lastState)
        {
            if (curState)
            {
                OnPressed = true;
            }
            else
            {
                OnReleased = true;
            }
        }
        lastState = curState;
    }

}

KeyboardInput

 public MyButton ButonRun = new MyButton();
 void Update()
 {
 	ButonRun.Tick(Input.GetKey("left shift"));
	run = ButonRun.IsPressing;  //按住则标记跑步状态
 }